Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

17 files changed, 5782 insertions, 0 deletions

diff --git a/fs/proc/Makefile b/fs/proc/Makefile
new file mode 100644
index 0000000..738b9b6
--- /dev/null
+++ b/fs/proc/Makefile
@@ -0,0 +1,14 @@
+#
+# Makefile for the Linux proc filesystem routines.
+#
+
+obj-$(CONFIG_PROC_FS) += proc.o
+
+proc-y			:= nommu.o task_nommu.o
+proc-$(CONFIG_MMU)	:= mmu.o task_mmu.o
+
+proc-y       += inode.o root.o base.o generic.o array.o \
+		kmsg.o proc_tty.o proc_misc.o
+
+proc-$(CONFIG_PROC_KCORE)	+= kcore.o
+proc-$(CONFIG_PROC_DEVICETREE)	+= proc_devtree.o
diff --git a/fs/proc/array.c b/fs/proc/array.c
new file mode 100644
index 0000000..37668fe
--- /dev/null
+++ b/fs/proc/array.c
@@ -0,0 +1,484 @@
+/*
+ *  linux/fs/proc/array.c
+ *
+ *  Copyright (C) 1992  by Linus Torvalds
+ *  based on ideas by Darren Senn
+ *
+ * Fixes:
+ * Michael. K. Johnson: stat,statm extensions.
+ *                      <johnsonm@stolaf.edu>
+ *
+ * Pauline Middelink :  Made cmdline,envline only break at '\0's, to
+ *                      make sure SET_PROCTITLE works. Also removed
+ *                      bad '!' which forced address recalculation for
+ *                      EVERY character on the current page.
+ *                      <middelin@polyware.iaf.nl>
+ *
+ * Danny ter Haar    :	added cpuinfo
+ *			<dth@cistron.nl>
+ *
+ * Alessandro Rubini :  profile extension.
+ *                      <rubini@ipvvis.unipv.it>
+ *
+ * Jeff Tranter      :  added BogoMips field to cpuinfo
+ *                      <Jeff_Tranter@Mitel.COM>
+ *
+ * Bruno Haible      :  remove 4K limit for the maps file
+ *			<haible@ma2s2.mathematik.uni-karlsruhe.de>
+ *
+ * Yves Arrouye      :  remove removal of trailing spaces in get_array.
+ *			<Yves.Arrouye@marin.fdn.fr>
+ *
+ * Jerome Forissier  :  added per-CPU time information to /proc/stat
+ *                      and /proc/<pid>/cpu extension
+ *                      <forissier@isia.cma.fr>
+ *			- Incorporation and non-SMP safe operation
+ *			of forissier patch in 2.1.78 by
+ *			Hans Marcus <crowbar@concepts.nl>
+ *
+ * aeb@cwi.nl        :  /proc/partitions
+ *
+ *
+ * Alan Cox	     :  security fixes.
+ *			<Alan.Cox@linux.org>
+ *
+ * Al Viro           :  safe handling of mm_struct
+ *
+ * Gerhard Wichert   :  added BIGMEM support
+ * Siemens AG           <Gerhard.Wichert@pdb.siemens.de>
+ *
+ * Al Viro & Jeff Garzik :  moved most of the thing into base.c and
+ *			 :  proc_misc.c. The rest may eventually go into
+ *			 :  base.c too.
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/tty.h>
+#include <linux/string.h>
+#include <linux/mman.h>
+#include <linux/proc_fs.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/signal.h>
+#include <linux/highmem.h>
+#include <linux/file.h>
+#include <linux/times.h>
+#include <linux/cpuset.h>
+
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include "internal.h"
+
+/* Gcc optimizes away "strlen(x)" for constant x */
+#define ADDBUF(buffer, string) \
+do { memcpy(buffer, string, strlen(string)); \
+     buffer += strlen(string); } while (0)
+
+static inline char * task_name(struct task_struct *p, char * buf)
+{
+	int i;
+	char * name;
+	char tcomm[sizeof(p->comm)];
+
+	get_task_comm(tcomm, p);
+
+	ADDBUF(buf, "Name:\t");
+	name = tcomm;
+	i = sizeof(tcomm);
+	do {
+		unsigned char c = *name;
+		name++;
+		i--;
+		*buf = c;
+		if (!c)
+			break;
+		if (c == '\\') {
+			buf[1] = c;
+			buf += 2;
+			continue;
+		}
+		if (c == '\n') {
+			buf[0] = '\\';
+			buf[1] = 'n';
+			buf += 2;
+			continue;
+		}
+		buf++;
+	} while (i);
+	*buf = '\n';
+	return buf+1;
+}
+
+/*
+ * The task state array is a strange "bitmap" of
+ * reasons to sleep. Thus "running" is zero, and
+ * you can test for combinations of others with
+ * simple bit tests.
+ */
+static const char *task_state_array[] = {
+	"R (running)",		/*  0 */
+	"S (sleeping)",		/*  1 */
+	"D (disk sleep)",	/*  2 */
+	"T (stopped)",		/*  4 */
+	"T (tracing stop)",	/*  8 */
+	"Z (zombie)",		/* 16 */
+	"X (dead)"		/* 32 */
+};
+
+static inline const char * get_task_state(struct task_struct *tsk)
+{
+	unsigned int state = (tsk->state & (TASK_RUNNING |
+					    TASK_INTERRUPTIBLE |
+					    TASK_UNINTERRUPTIBLE |
+					    TASK_STOPPED |
+					    TASK_TRACED)) |
+			(tsk->exit_state & (EXIT_ZOMBIE |
+					    EXIT_DEAD));
+	const char **p = &task_state_array[0];
+
+	while (state) {
+		p++;
+		state >>= 1;
+	}
+	return *p;
+}
+
+static inline char * task_state(struct task_struct *p, char *buffer)
+{
+	struct group_info *group_info;
+	int g;
+
+	read_lock(&tasklist_lock);
+	buffer += sprintf(buffer,
+		"State:\t%s\n"
+		"SleepAVG:\t%lu%%\n"
+		"Tgid:\t%d\n"
+		"Pid:\t%d\n"
+		"PPid:\t%d\n"
+		"TracerPid:\t%d\n"
+		"Uid:\t%d\t%d\t%d\t%d\n"
+		"Gid:\t%d\t%d\t%d\t%d\n",
+		get_task_state(p),
+		(p->sleep_avg/1024)*100/(1020000000/1024),
+	       	p->tgid,
+		p->pid, pid_alive(p) ? p->group_leader->real_parent->tgid : 0,
+		pid_alive(p) && p->ptrace ? p->parent->pid : 0,
+		p->uid, p->euid, p->suid, p->fsuid,
+		p->gid, p->egid, p->sgid, p->fsgid);
+	read_unlock(&tasklist_lock);
+	task_lock(p);
+	buffer += sprintf(buffer,
+		"FDSize:\t%d\n"
+		"Groups:\t",
+		p->files ? p->files->max_fds : 0);
+
+	group_info = p->group_info;
+	get_group_info(group_info);
+	task_unlock(p);
+
+	for (g = 0; g < min(group_info->ngroups,NGROUPS_SMALL); g++)
+		buffer += sprintf(buffer, "%d ", GROUP_AT(group_info,g));
+	put_group_info(group_info);
+
+	buffer += sprintf(buffer, "\n");
+	return buffer;
+}
+
+static char * render_sigset_t(const char *header, sigset_t *set, char *buffer)
+{
+	int i, len;
+
+	len = strlen(header);
+	memcpy(buffer, header, len);
+	buffer += len;
+
+	i = _NSIG;
+	do {
+		int x = 0;
+
+		i -= 4;
+		if (sigismember(set, i+1)) x |= 1;
+		if (sigismember(set, i+2)) x |= 2;
+		if (sigismember(set, i+3)) x |= 4;
+		if (sigismember(set, i+4)) x |= 8;
+		*buffer++ = (x < 10 ? '0' : 'a' - 10) + x;
+	} while (i >= 4);
+
+	*buffer++ = '\n';
+	*buffer = 0;
+	return buffer;
+}
+
+static void collect_sigign_sigcatch(struct task_struct *p, sigset_t *ign,
+				    sigset_t *catch)
+{
+	struct k_sigaction *k;
+	int i;
+
+	k = p->sighand->action;
+	for (i = 1; i <= _NSIG; ++i, ++k) {
+		if (k->sa.sa_handler == SIG_IGN)
+			sigaddset(ign, i);
+		else if (k->sa.sa_handler != SIG_DFL)
+			sigaddset(catch, i);
+	}
+}
+
+static inline char * task_sig(struct task_struct *p, char *buffer)
+{
+	sigset_t pending, shpending, blocked, ignored, caught;
+	int num_threads = 0;
+	unsigned long qsize = 0;
+	unsigned long qlim = 0;
+
+	sigemptyset(&pending);
+	sigemptyset(&shpending);
+	sigemptyset(&blocked);
+	sigemptyset(&ignored);
+	sigemptyset(&caught);
+
+	/* Gather all the data with the appropriate locks held */
+	read_lock(&tasklist_lock);
+	if (p->sighand) {
+		spin_lock_irq(&p->sighand->siglock);
+		pending = p->pending.signal;
+		shpending = p->signal->shared_pending.signal;
+		blocked = p->blocked;
+		collect_sigign_sigcatch(p, &ignored, &caught);
+		num_threads = atomic_read(&p->signal->count);
+		qsize = atomic_read(&p->user->sigpending);
+		qlim = p->signal->rlim[RLIMIT_SIGPENDING].rlim_cur;
+		spin_unlock_irq(&p->sighand->siglock);
+	}
+	read_unlock(&tasklist_lock);
+
+	buffer += sprintf(buffer, "Threads:\t%d\n", num_threads);
+	buffer += sprintf(buffer, "SigQ:\t%lu/%lu\n", qsize, qlim);
+
+	/* render them all */
+	buffer = render_sigset_t("SigPnd:\t", &pending, buffer);
+	buffer = render_sigset_t("ShdPnd:\t", &shpending, buffer);
+	buffer = render_sigset_t("SigBlk:\t", &blocked, buffer);
+	buffer = render_sigset_t("SigIgn:\t", &ignored, buffer);
+	buffer = render_sigset_t("SigCgt:\t", &caught, buffer);
+
+	return buffer;
+}
+
+static inline char *task_cap(struct task_struct *p, char *buffer)
+{
+    return buffer + sprintf(buffer, "CapInh:\t%016x\n"
+			    "CapPrm:\t%016x\n"
+			    "CapEff:\t%016x\n",
+			    cap_t(p->cap_inheritable),
+			    cap_t(p->cap_permitted),
+			    cap_t(p->cap_effective));
+}
+
+int proc_pid_status(struct task_struct *task, char * buffer)
+{
+	char * orig = buffer;
+	struct mm_struct *mm = get_task_mm(task);
+
+	buffer = task_name(task, buffer);
+	buffer = task_state(task, buffer);
+ 
+	if (mm) {
+		buffer = task_mem(mm, buffer);
+		mmput(mm);
+	}
+	buffer = task_sig(task, buffer);
+	buffer = task_cap(task, buffer);
+	buffer = cpuset_task_status_allowed(task, buffer);
+#if defined(CONFIG_ARCH_S390)
+	buffer = task_show_regs(task, buffer);
+#endif
+	return buffer - orig;
+}
+
+static int do_task_stat(struct task_struct *task, char * buffer, int whole)
+{
+	unsigned long vsize, eip, esp, wchan = ~0UL;
+	long priority, nice;
+	int tty_pgrp = -1, tty_nr = 0;
+	sigset_t sigign, sigcatch;
+	char state;
+	int res;
+ 	pid_t ppid, pgid = -1, sid = -1;
+	int num_threads = 0;
+	struct mm_struct *mm;
+	unsigned long long start_time;
+	unsigned long cmin_flt = 0, cmaj_flt = 0;
+	unsigned long  min_flt = 0,  maj_flt = 0;
+	cputime_t cutime, cstime, utime, stime;
+	unsigned long rsslim = 0;
+	unsigned long it_real_value = 0;
+	struct task_struct *t;
+	char tcomm[sizeof(task->comm)];
+
+	state = *get_task_state(task);
+	vsize = eip = esp = 0;
+	mm = get_task_mm(task);
+	if (mm) {
+		vsize = task_vsize(mm);
+		eip = KSTK_EIP(task);
+		esp = KSTK_ESP(task);
+	}
+
+	get_task_comm(tcomm, task);
+
+	sigemptyset(&sigign);
+	sigemptyset(&sigcatch);
+	cutime = cstime = utime = stime = cputime_zero;
+	read_lock(&tasklist_lock);
+	if (task->sighand) {
+		spin_lock_irq(&task->sighand->siglock);
+		num_threads = atomic_read(&task->signal->count);
+		collect_sigign_sigcatch(task, &sigign, &sigcatch);
+
+		/* add up live thread stats at the group level */
+		if (whole) {
+			t = task;
+			do {
+				min_flt += t->min_flt;
+				maj_flt += t->maj_flt;
+				utime = cputime_add(utime, t->utime);
+				stime = cputime_add(stime, t->stime);
+				t = next_thread(t);
+			} while (t != task);
+		}
+
+		spin_unlock_irq(&task->sighand->siglock);
+	}
+	if (task->signal) {
+		if (task->signal->tty) {
+			tty_pgrp = task->signal->tty->pgrp;
+			tty_nr = new_encode_dev(tty_devnum(task->signal->tty));
+		}
+		pgid = process_group(task);
+		sid = task->signal->session;
+		cmin_flt = task->signal->cmin_flt;
+		cmaj_flt = task->signal->cmaj_flt;
+		cutime = task->signal->cutime;
+		cstime = task->signal->cstime;
+		rsslim = task->signal->rlim[RLIMIT_RSS].rlim_cur;
+		if (whole) {
+			min_flt += task->signal->min_flt;
+			maj_flt += task->signal->maj_flt;
+			utime = cputime_add(utime, task->signal->utime);
+			stime = cputime_add(stime, task->signal->stime);
+		}
+		it_real_value = task->signal->it_real_value;
+	}
+	ppid = pid_alive(task) ? task->group_leader->real_parent->tgid : 0;
+	read_unlock(&tasklist_lock);
+
+	if (!whole || num_threads<2)
+		wchan = get_wchan(task);
+	if (!whole) {
+		min_flt = task->min_flt;
+		maj_flt = task->maj_flt;
+		utime = task->utime;
+		stime = task->stime;
+	}
+
+	/* scale priority and nice values from timeslices to -20..20 */
+	/* to make it look like a "normal" Unix priority/nice value  */
+	priority = task_prio(task);
+	nice = task_nice(task);
+
+	/* Temporary variable needed for gcc-2.96 */
+	/* convert timespec -> nsec*/
+	start_time = (unsigned long long)task->start_time.tv_sec * NSEC_PER_SEC
+				+ task->start_time.tv_nsec;
+	/* convert nsec -> ticks */
+	start_time = nsec_to_clock_t(start_time);
+
+	res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
+%lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \
+%lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
+		task->pid,
+		tcomm,
+		state,
+		ppid,
+		pgid,
+		sid,
+		tty_nr,
+		tty_pgrp,
+		task->flags,
+		min_flt,
+		cmin_flt,
+		maj_flt,
+		cmaj_flt,
+		cputime_to_clock_t(utime),
+		cputime_to_clock_t(stime),
+		cputime_to_clock_t(cutime),
+		cputime_to_clock_t(cstime),
+		priority,
+		nice,
+		num_threads,
+		jiffies_to_clock_t(it_real_value),
+		start_time,
+		vsize,
+		mm ? get_mm_counter(mm, rss) : 0, /* you might want to shift this left 3 */
+	        rsslim,
+		mm ? mm->start_code : 0,
+		mm ? mm->end_code : 0,
+		mm ? mm->start_stack : 0,
+		esp,
+		eip,
+		/* The signal information here is obsolete.
+		 * It must be decimal for Linux 2.0 compatibility.
+		 * Use /proc/#/status for real-time signals.
+		 */
+		task->pending.signal.sig[0] & 0x7fffffffUL,
+		task->blocked.sig[0] & 0x7fffffffUL,
+		sigign      .sig[0] & 0x7fffffffUL,
+		sigcatch    .sig[0] & 0x7fffffffUL,
+		wchan,
+		0UL,
+		0UL,
+		task->exit_signal,
+		task_cpu(task),
+		task->rt_priority,
+		task->policy);
+	if(mm)
+		mmput(mm);
+	return res;
+}
+
+int proc_tid_stat(struct task_struct *task, char * buffer)
+{
+	return do_task_stat(task, buffer, 0);
+}
+
+int proc_tgid_stat(struct task_struct *task, char * buffer)
+{
+	return do_task_stat(task, buffer, 1);
+}
+
+int proc_pid_statm(struct task_struct *task, char *buffer)
+{
+	int size = 0, resident = 0, shared = 0, text = 0, lib = 0, data = 0;
+	struct mm_struct *mm = get_task_mm(task);
+	
+	if (mm) {
+		size = task_statm(mm, &shared, &text, &data, &resident);
+		mmput(mm);
+	}
+
+	return sprintf(buffer,"%d %d %d %d %d %d %d\n",
+		       size, resident, shared, text, lib, data, 0);
+}
diff --git a/fs/proc/base.c b/fs/proc/base.c
new file mode 100644
index 0000000..dad8ea4
--- /dev/null
+++ b/fs/proc/base.c
@@ -0,0 +1,2056 @@
+/*
+ *  linux/fs/proc/base.c
+ *
+ *  Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ *  proc base directory handling functions
+ *
+ *  1999, Al Viro. Rewritten. Now it covers the whole per-process part.
+ *  Instead of using magical inumbers to determine the kind of object
+ *  we allocate and fill in-core inodes upon lookup. They don't even
+ *  go into icache. We cache the reference to task_struct upon lookup too.
+ *  Eventually it should become a filesystem in its own. We don't use the
+ *  rest of procfs anymore.
+ */
+
+#include <asm/uaccess.h>
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/file.h>
+#include <linux/string.h>
+#include <linux/seq_file.h>
+#include <linux/namei.h>
+#include <linux/namespace.h>
+#include <linux/mm.h>
+#include <linux/smp_lock.h>
+#include <linux/kallsyms.h>
+#include <linux/mount.h>
+#include <linux/security.h>
+#include <linux/ptrace.h>
+#include <linux/seccomp.h>
+#include <linux/cpuset.h>
+#include <linux/audit.h>
+#include "internal.h"
+
+/*
+ * For hysterical raisins we keep the same inumbers as in the old procfs.
+ * Feel free to change the macro below - just keep the range distinct from
+ * inumbers of the rest of procfs (currently those are in 0x0000--0xffff).
+ * As soon as we'll get a separate superblock we will be able to forget
+ * about magical ranges too.
+ */
+
+#define fake_ino(pid,ino) (((pid)<<16)|(ino))
+
+enum pid_directory_inos {
+	PROC_TGID_INO = 2,
+	PROC_TGID_TASK,
+	PROC_TGID_STATUS,
+	PROC_TGID_MEM,
+#ifdef CONFIG_SECCOMP
+	PROC_TGID_SECCOMP,
+#endif
+	PROC_TGID_CWD,
+	PROC_TGID_ROOT,
+	PROC_TGID_EXE,
+	PROC_TGID_FD,
+	PROC_TGID_ENVIRON,
+	PROC_TGID_AUXV,
+	PROC_TGID_CMDLINE,
+	PROC_TGID_STAT,
+	PROC_TGID_STATM,
+	PROC_TGID_MAPS,
+	PROC_TGID_MOUNTS,
+	PROC_TGID_WCHAN,
+#ifdef CONFIG_SCHEDSTATS
+	PROC_TGID_SCHEDSTAT,
+#endif
+#ifdef CONFIG_CPUSETS
+	PROC_TGID_CPUSET,
+#endif
+#ifdef CONFIG_SECURITY
+	PROC_TGID_ATTR,
+	PROC_TGID_ATTR_CURRENT,
+	PROC_TGID_ATTR_PREV,
+	PROC_TGID_ATTR_EXEC,
+	PROC_TGID_ATTR_FSCREATE,
+#endif
+#ifdef CONFIG_AUDITSYSCALL
+	PROC_TGID_LOGINUID,
+#endif
+	PROC_TGID_FD_DIR,
+	PROC_TGID_OOM_SCORE,
+	PROC_TGID_OOM_ADJUST,
+	PROC_TID_INO,
+	PROC_TID_STATUS,
+	PROC_TID_MEM,
+#ifdef CONFIG_SECCOMP
+	PROC_TID_SECCOMP,
+#endif
+	PROC_TID_CWD,
+	PROC_TID_ROOT,
+	PROC_TID_EXE,
+	PROC_TID_FD,
+	PROC_TID_ENVIRON,
+	PROC_TID_AUXV,
+	PROC_TID_CMDLINE,
+	PROC_TID_STAT,
+	PROC_TID_STATM,
+	PROC_TID_MAPS,
+	PROC_TID_MOUNTS,
+	PROC_TID_WCHAN,
+#ifdef CONFIG_SCHEDSTATS
+	PROC_TID_SCHEDSTAT,
+#endif
+#ifdef CONFIG_CPUSETS
+	PROC_TID_CPUSET,
+#endif
+#ifdef CONFIG_SECURITY
+	PROC_TID_ATTR,
+	PROC_TID_ATTR_CURRENT,
+	PROC_TID_ATTR_PREV,
+	PROC_TID_ATTR_EXEC,
+	PROC_TID_ATTR_FSCREATE,
+#endif
+#ifdef CONFIG_AUDITSYSCALL
+	PROC_TID_LOGINUID,
+#endif
+	PROC_TID_FD_DIR = 0x8000,	/* 0x8000-0xffff */
+	PROC_TID_OOM_SCORE,
+	PROC_TID_OOM_ADJUST,
+};
+
+struct pid_entry {
+	int type;
+	int len;
+	char *name;
+	mode_t mode;
+};
+
+#define E(type,name,mode) {(type),sizeof(name)-1,(name),(mode)}
+
+static struct pid_entry tgid_base_stuff[] = {
+	E(PROC_TGID_TASK,      "task",    S_IFDIR|S_IRUGO|S_IXUGO),
+	E(PROC_TGID_FD,        "fd",      S_IFDIR|S_IRUSR|S_IXUSR),
+	E(PROC_TGID_ENVIRON,   "environ", S_IFREG|S_IRUSR),
+	E(PROC_TGID_AUXV,      "auxv",	  S_IFREG|S_IRUSR),
+	E(PROC_TGID_STATUS,    "status",  S_IFREG|S_IRUGO),
+	E(PROC_TGID_CMDLINE,   "cmdline", S_IFREG|S_IRUGO),
+	E(PROC_TGID_STAT,      "stat",    S_IFREG|S_IRUGO),
+	E(PROC_TGID_STATM,     "statm",   S_IFREG|S_IRUGO),
+	E(PROC_TGID_MAPS,      "maps",    S_IFREG|S_IRUGO),
+	E(PROC_TGID_MEM,       "mem",     S_IFREG|S_IRUSR|S_IWUSR),
+#ifdef CONFIG_SECCOMP
+	E(PROC_TGID_SECCOMP,   "seccomp", S_IFREG|S_IRUSR|S_IWUSR),
+#endif
+	E(PROC_TGID_CWD,       "cwd",     S_IFLNK|S_IRWXUGO),
+	E(PROC_TGID_ROOT,      "root",    S_IFLNK|S_IRWXUGO),
+	E(PROC_TGID_EXE,       "exe",     S_IFLNK|S_IRWXUGO),
+	E(PROC_TGID_MOUNTS,    "mounts",  S_IFREG|S_IRUGO),
+#ifdef CONFIG_SECURITY
+	E(PROC_TGID_ATTR,      "attr",    S_IFDIR|S_IRUGO|S_IXUGO),
+#endif
+#ifdef CONFIG_KALLSYMS
+	E(PROC_TGID_WCHAN,     "wchan",   S_IFREG|S_IRUGO),
+#endif
+#ifdef CONFIG_SCHEDSTATS
+	E(PROC_TGID_SCHEDSTAT, "schedstat", S_IFREG|S_IRUGO),
+#endif
+#ifdef CONFIG_CPUSETS
+	E(PROC_TGID_CPUSET,    "cpuset",  S_IFREG|S_IRUGO),
+#endif
+	E(PROC_TGID_OOM_SCORE, "oom_score",S_IFREG|S_IRUGO),
+	E(PROC_TGID_OOM_ADJUST,"oom_adj", S_IFREG|S_IRUGO|S_IWUSR),
+#ifdef CONFIG_AUDITSYSCALL
+	E(PROC_TGID_LOGINUID, "loginuid", S_IFREG|S_IWUSR|S_IRUGO),
+#endif
+	{0,0,NULL,0}
+};
+static struct pid_entry tid_base_stuff[] = {
+	E(PROC_TID_FD,         "fd",      S_IFDIR|S_IRUSR|S_IXUSR),
+	E(PROC_TID_ENVIRON,    "environ", S_IFREG|S_IRUSR),
+	E(PROC_TID_AUXV,       "auxv",	  S_IFREG|S_IRUSR),
+	E(PROC_TID_STATUS,     "status",  S_IFREG|S_IRUGO),
+	E(PROC_TID_CMDLINE,    "cmdline", S_IFREG|S_IRUGO),
+	E(PROC_TID_STAT,       "stat",    S_IFREG|S_IRUGO),
+	E(PROC_TID_STATM,      "statm",   S_IFREG|S_IRUGO),
+	E(PROC_TID_MAPS,       "maps",    S_IFREG|S_IRUGO),
+	E(PROC_TID_MEM,        "mem",     S_IFREG|S_IRUSR|S_IWUSR),
+#ifdef CONFIG_SECCOMP
+	E(PROC_TID_SECCOMP,    "seccomp", S_IFREG|S_IRUSR|S_IWUSR),
+#endif
+	E(PROC_TID_CWD,        "cwd",     S_IFLNK|S_IRWXUGO),
+	E(PROC_TID_ROOT,       "root",    S_IFLNK|S_IRWXUGO),
+	E(PROC_TID_EXE,        "exe",     S_IFLNK|S_IRWXUGO),
+	E(PROC_TID_MOUNTS,     "mounts",  S_IFREG|S_IRUGO),
+#ifdef CONFIG_SECURITY
+	E(PROC_TID_ATTR,       "attr",    S_IFDIR|S_IRUGO|S_IXUGO),
+#endif
+#ifdef CONFIG_KALLSYMS
+	E(PROC_TID_WCHAN,      "wchan",   S_IFREG|S_IRUGO),
+#endif
+#ifdef CONFIG_SCHEDSTATS
+	E(PROC_TID_SCHEDSTAT, "schedstat",S_IFREG|S_IRUGO),
+#endif
+#ifdef CONFIG_CPUSETS
+	E(PROC_TID_CPUSET,     "cpuset",  S_IFREG|S_IRUGO),
+#endif
+	E(PROC_TID_OOM_SCORE,  "oom_score",S_IFREG|S_IRUGO),
+	E(PROC_TID_OOM_ADJUST, "oom_adj", S_IFREG|S_IRUGO|S_IWUSR),
+#ifdef CONFIG_AUDITSYSCALL
+	E(PROC_TID_LOGINUID, "loginuid", S_IFREG|S_IWUSR|S_IRUGO),
+#endif
+	{0,0,NULL,0}
+};
+
+#ifdef CONFIG_SECURITY
+static struct pid_entry tgid_attr_stuff[] = {
+	E(PROC_TGID_ATTR_CURRENT,  "current",  S_IFREG|S_IRUGO|S_IWUGO),
+	E(PROC_TGID_ATTR_PREV,     "prev",     S_IFREG|S_IRUGO),
+	E(PROC_TGID_ATTR_EXEC,     "exec",     S_IFREG|S_IRUGO|S_IWUGO),
+	E(PROC_TGID_ATTR_FSCREATE, "fscreate", S_IFREG|S_IRUGO|S_IWUGO),
+	{0,0,NULL,0}
+};
+static struct pid_entry tid_attr_stuff[] = {
+	E(PROC_TID_ATTR_CURRENT,   "current",  S_IFREG|S_IRUGO|S_IWUGO),
+	E(PROC_TID_ATTR_PREV,      "prev",     S_IFREG|S_IRUGO),
+	E(PROC_TID_ATTR_EXEC,      "exec",     S_IFREG|S_IRUGO|S_IWUGO),
+	E(PROC_TID_ATTR_FSCREATE,  "fscreate", S_IFREG|S_IRUGO|S_IWUGO),
+	{0,0,NULL,0}
+};
+#endif
+
+#undef E
+
+static int proc_fd_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+	struct task_struct *task = proc_task(inode);
+	struct files_struct *files;
+	struct file *file;
+	int fd = proc_type(inode) - PROC_TID_FD_DIR;
+
+	files = get_files_struct(task);
+	if (files) {
+		spin_lock(&files->file_lock);
+		file = fcheck_files(files, fd);
+		if (file) {
+			*mnt = mntget(file->f_vfsmnt);
+			*dentry = dget(file->f_dentry);
+			spin_unlock(&files->file_lock);
+			put_files_struct(files);
+			return 0;
+		}
+		spin_unlock(&files->file_lock);
+		put_files_struct(files);
+	}
+	return -ENOENT;
+}
+
+static int proc_cwd_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+	struct fs_struct *fs;
+	int result = -ENOENT;
+	task_lock(proc_task(inode));
+	fs = proc_task(inode)->fs;
+	if(fs)
+		atomic_inc(&fs->count);
+	task_unlock(proc_task(inode));
+	if (fs) {
+		read_lock(&fs->lock);
+		*mnt = mntget(fs->pwdmnt);
+		*dentry = dget(fs->pwd);
+		read_unlock(&fs->lock);
+		result = 0;
+		put_fs_struct(fs);
+	}
+	return result;
+}
+
+static int proc_root_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+	struct fs_struct *fs;
+	int result = -ENOENT;
+	task_lock(proc_task(inode));
+	fs = proc_task(inode)->fs;
+	if(fs)
+		atomic_inc(&fs->count);
+	task_unlock(proc_task(inode));
+	if (fs) {
+		read_lock(&fs->lock);
+		*mnt = mntget(fs->rootmnt);
+		*dentry = dget(fs->root);
+		read_unlock(&fs->lock);
+		result = 0;
+		put_fs_struct(fs);
+	}
+	return result;
+}
+
+#define MAY_PTRACE(task) \
+	(task == current || \
+	(task->parent == current && \
+	(task->ptrace & PT_PTRACED) && \
+	 (task->state == TASK_STOPPED || task->state == TASK_TRACED) && \
+	 security_ptrace(current,task) == 0))
+
+static int may_ptrace_attach(struct task_struct *task)
+{
+	int retval = 0;
+
+	task_lock(task);
+
+	if (!task->mm)
+		goto out;
+	if (((current->uid != task->euid) ||
+	     (current->uid != task->suid) ||
+	     (current->uid != task->uid) ||
+	     (current->gid != task->egid) ||
+	     (current->gid != task->sgid) ||
+	     (current->gid != task->gid)) && !capable(CAP_SYS_PTRACE))
+		goto out;
+	rmb();
+	if (!task->mm->dumpable && !capable(CAP_SYS_PTRACE))
+		goto out;
+	if (security_ptrace(current, task))
+		goto out;
+
+	retval = 1;
+out:
+	task_unlock(task);
+	return retval;
+}
+
+static int proc_pid_environ(struct task_struct *task, char * buffer)
+{
+	int res = 0;
+	struct mm_struct *mm = get_task_mm(task);
+	if (mm) {
+		unsigned int len = mm->env_end - mm->env_start;
+		if (len > PAGE_SIZE)
+			len = PAGE_SIZE;
+		res = access_process_vm(task, mm->env_start, buffer, len, 0);
+		if (!may_ptrace_attach(task))
+			res = -ESRCH;
+		mmput(mm);
+	}
+	return res;
+}
+
+static int proc_pid_cmdline(struct task_struct *task, char * buffer)
+{
+	int res = 0;
+	unsigned int len;
+	struct mm_struct *mm = get_task_mm(task);
+	if (!mm)
+		goto out;
+	if (!mm->arg_end)
+		goto out_mm;	/* Shh! No looking before we're done */
+
+ 	len = mm->arg_end - mm->arg_start;
+ 
+	if (len > PAGE_SIZE)
+		len = PAGE_SIZE;
+ 
+	res = access_process_vm(task, mm->arg_start, buffer, len, 0);
+
+	// If the nul at the end of args has been overwritten, then
+	// assume application is using setproctitle(3).
+	if (res > 0 && buffer[res-1] != '\0' && len < PAGE_SIZE) {
+		len = strnlen(buffer, res);
+		if (len < res) {
+		    res = len;
+		} else {
+			len = mm->env_end - mm->env_start;
+			if (len > PAGE_SIZE - res)
+				len = PAGE_SIZE - res;
+			res += access_process_vm(task, mm->env_start, buffer+res, len, 0);
+			res = strnlen(buffer, res);
+		}
+	}
+out_mm:
+	mmput(mm);
+out:
+	return res;
+}
+
+static int proc_pid_auxv(struct task_struct *task, char *buffer)
+{
+	int res = 0;
+	struct mm_struct *mm = get_task_mm(task);
+	if (mm) {
+		unsigned int nwords = 0;
+		do
+			nwords += 2;
+		while (mm->saved_auxv[nwords - 2] != 0); /* AT_NULL */
+		res = nwords * sizeof(mm->saved_auxv[0]);
+		if (res > PAGE_SIZE)
+			res = PAGE_SIZE;
+		memcpy(buffer, mm->saved_auxv, res);
+		mmput(mm);
+	}
+	return res;
+}
+
+
+#ifdef CONFIG_KALLSYMS
+/*
+ * Provides a wchan file via kallsyms in a proper one-value-per-file format.
+ * Returns the resolved symbol.  If that fails, simply return the address.
+ */
+static int proc_pid_wchan(struct task_struct *task, char *buffer)
+{
+	char *modname;
+	const char *sym_name;
+	unsigned long wchan, size, offset;
+	char namebuf[KSYM_NAME_LEN+1];
+
+	wchan = get_wchan(task);
+
+	sym_name = kallsyms_lookup(wchan, &size, &offset, &modname, namebuf);
+	if (sym_name)
+		return sprintf(buffer, "%s", sym_name);
+	return sprintf(buffer, "%lu", wchan);
+}
+#endif /* CONFIG_KALLSYMS */
+
+#ifdef CONFIG_SCHEDSTATS
+/*
+ * Provides /proc/PID/schedstat
+ */
+static int proc_pid_schedstat(struct task_struct *task, char *buffer)
+{
+	return sprintf(buffer, "%lu %lu %lu\n",
+			task->sched_info.cpu_time,
+			task->sched_info.run_delay,
+			task->sched_info.pcnt);
+}
+#endif
+
+/* The badness from the OOM killer */
+unsigned long badness(struct task_struct *p, unsigned long uptime);
+static int proc_oom_score(struct task_struct *task, char *buffer)
+{
+	unsigned long points;
+	struct timespec uptime;
+
+	do_posix_clock_monotonic_gettime(&uptime);
+	points = badness(task, uptime.tv_sec);
+	return sprintf(buffer, "%lu\n", points);
+}
+
+/************************************************************************/
+/*                       Here the fs part begins                        */
+/************************************************************************/
+
+/* permission checks */
+
+static int proc_check_root(struct inode *inode)
+{
+	struct dentry *de, *base, *root;
+	struct vfsmount *our_vfsmnt, *vfsmnt, *mnt;
+	int res = 0;
+
+	if (proc_root_link(inode, &root, &vfsmnt)) /* Ewww... */
+		return -ENOENT;
+	read_lock(&current->fs->lock);
+	our_vfsmnt = mntget(current->fs->rootmnt);
+	base = dget(current->fs->root);
+	read_unlock(&current->fs->lock);
+
+	spin_lock(&vfsmount_lock);
+	de = root;
+	mnt = vfsmnt;
+
+	while (vfsmnt != our_vfsmnt) {
+		if (vfsmnt == vfsmnt->mnt_parent)
+			goto out;
+		de = vfsmnt->mnt_mountpoint;
+		vfsmnt = vfsmnt->mnt_parent;
+	}
+
+	if (!is_subdir(de, base))
+		goto out;
+	spin_unlock(&vfsmount_lock);
+
+exit:
+	dput(base);
+	mntput(our_vfsmnt);
+	dput(root);
+	mntput(mnt);
+	return res;
+out:
+	spin_unlock(&vfsmount_lock);
+	res = -EACCES;
+	goto exit;
+}
+
+static int proc_permission(struct inode *inode, int mask, struct nameidata *nd)
+{
+	if (generic_permission(inode, mask, NULL) != 0)
+		return -EACCES;
+	return proc_check_root(inode);
+}
+
+extern struct seq_operations proc_pid_maps_op;
+static int maps_open(struct inode *inode, struct file *file)
+{
+	struct task_struct *task = proc_task(inode);
+	int ret = seq_open(file, &proc_pid_maps_op);
+	if (!ret) {
+		struct seq_file *m = file->private_data;
+		m->private = task;
+	}
+	return ret;
+}
+
+static struct file_operations proc_maps_operations = {
+	.open		= maps_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+extern struct seq_operations mounts_op;
+static int mounts_open(struct inode *inode, struct file *file)
+{
+	struct task_struct *task = proc_task(inode);
+	int ret = seq_open(file, &mounts_op);
+
+	if (!ret) {
+		struct seq_file *m = file->private_data;
+		struct namespace *namespace;
+		task_lock(task);
+		namespace = task->namespace;
+		if (namespace)
+			get_namespace(namespace);
+		task_unlock(task);
+
+		if (namespace)
+			m->private = namespace;
+		else {
+			seq_release(inode, file);
+			ret = -EINVAL;
+		}
+	}
+	return ret;
+}
+
+static int mounts_release(struct inode *inode, struct file *file)
+{
+	struct seq_file *m = file->private_data;
+	struct namespace *namespace = m->private;
+	put_namespace(namespace);
+	return seq_release(inode, file);
+}
+
+static struct file_operations proc_mounts_operations = {
+	.open		= mounts_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= mounts_release,
+};
+
+#define PROC_BLOCK_SIZE	(3*1024)		/* 4K page size but our output routines use some slack for overruns */
+
+static ssize_t proc_info_read(struct file * file, char __user * buf,
+			  size_t count, loff_t *ppos)
+{
+	struct inode * inode = file->f_dentry->d_inode;
+	unsigned long page;
+	ssize_t length;
+	struct task_struct *task = proc_task(inode);
+
+	if (count > PROC_BLOCK_SIZE)
+		count = PROC_BLOCK_SIZE;
+	if (!(page = __get_free_page(GFP_KERNEL)))
+		return -ENOMEM;
+
+	length = PROC_I(inode)->op.proc_read(task, (char*)page);
+
+	if (length >= 0)
+		length = simple_read_from_buffer(buf, count, ppos, (char *)page, length);
+	free_page(page);
+	return length;
+}
+
+static struct file_operations proc_info_file_operations = {
+	.read		= proc_info_read,
+};
+
+static int mem_open(struct inode* inode, struct file* file)
+{
+	file->private_data = (void*)((long)current->self_exec_id);
+	return 0;
+}
+
+static ssize_t mem_read(struct file * file, char __user * buf,
+			size_t count, loff_t *ppos)
+{
+	struct task_struct *task = proc_task(file->f_dentry->d_inode);
+	char *page;
+	unsigned long src = *ppos;
+	int ret = -ESRCH;
+	struct mm_struct *mm;
+
+	if (!MAY_PTRACE(task) || !may_ptrace_attach(task))
+		goto out;
+
+	ret = -ENOMEM;
+	page = (char *)__get_free_page(GFP_USER);
+	if (!page)
+		goto out;
+
+	ret = 0;
+ 
+	mm = get_task_mm(task);
+	if (!mm)
+		goto out_free;
+
+	ret = -EIO;
+ 
+	if (file->private_data != (void*)((long)current->self_exec_id))
+		goto out_put;
+
+	ret = 0;
+ 
+	while (count > 0) {
+		int this_len, retval;
+
+		this_len = (count > PAGE_SIZE) ? PAGE_SIZE : count;
+		retval = access_process_vm(task, src, page, this_len, 0);
+		if (!retval || !MAY_PTRACE(task) || !may_ptrace_attach(task)) {
+			if (!ret)
+				ret = -EIO;
+			break;
+		}
+
+		if (copy_to_user(buf, page, retval)) {
+			ret = -EFAULT;
+			break;
+		}
+ 
+		ret += retval;
+		src += retval;
+		buf += retval;
+		count -= retval;
+	}
+	*ppos = src;
+
+out_put:
+	mmput(mm);
+out_free:
+	free_page((unsigned long) page);
+out:
+	return ret;
+}
+
+#define mem_write NULL
+
+#ifndef mem_write
+/* This is a security hazard */
+static ssize_t mem_write(struct file * file, const char * buf,
+			 size_t count, loff_t *ppos)
+{
+	int copied = 0;
+	char *page;
+	struct task_struct *task = proc_task(file->f_dentry->d_inode);
+	unsigned long dst = *ppos;
+
+	if (!MAY_PTRACE(task) || !may_ptrace_attach(task))
+		return -ESRCH;
+
+	page = (char *)__get_free_page(GFP_USER);
+	if (!page)
+		return -ENOMEM;
+
+	while (count > 0) {
+		int this_len, retval;
+
+		this_len = (count > PAGE_SIZE) ? PAGE_SIZE : count;
+		if (copy_from_user(page, buf, this_len)) {
+			copied = -EFAULT;
+			break;
+		}
+		retval = access_process_vm(task, dst, page, this_len, 1);
+		if (!retval) {
+			if (!copied)
+				copied = -EIO;
+			break;
+		}
+		copied += retval;
+		buf += retval;
+		dst += retval;
+		count -= retval;			
+	}
+	*ppos = dst;
+	free_page((unsigned long) page);
+	return copied;
+}
+#endif
+
+static loff_t mem_lseek(struct file * file, loff_t offset, int orig)
+{
+	switch (orig) {
+	case 0:
+		file->f_pos = offset;
+		break;
+	case 1:
+		file->f_pos += offset;
+		break;
+	default:
+		return -EINVAL;
+	}
+	force_successful_syscall_return();
+	return file->f_pos;
+}
+
+static struct file_operations proc_mem_operations = {
+	.llseek		= mem_lseek,
+	.read		= mem_read,
+	.write		= mem_write,
+	.open		= mem_open,
+};
+
+static ssize_t oom_adjust_read(struct file *file, char __user *buf,
+				size_t count, loff_t *ppos)
+{
+	struct task_struct *task = proc_task(file->f_dentry->d_inode);
+	char buffer[8];
+	size_t len;
+	int oom_adjust = task->oomkilladj;
+	loff_t __ppos = *ppos;
+
+	len = sprintf(buffer, "%i\n", oom_adjust);
+	if (__ppos >= len)
+		return 0;
+	if (count > len-__ppos)
+		count = len-__ppos;
+	if (copy_to_user(buf, buffer + __ppos, count))
+		return -EFAULT;
+	*ppos = __ppos + count;
+	return count;
+}
+
+static ssize_t oom_adjust_write(struct file *file, const char __user *buf,
+				size_t count, loff_t *ppos)
+{
+	struct task_struct *task = proc_task(file->f_dentry->d_inode);
+	char buffer[8], *end;
+	int oom_adjust;
+
+	if (!capable(CAP_SYS_RESOURCE))
+		return -EPERM;
+	memset(buffer, 0, 8);
+	if (count > 6)
+		count = 6;
+	if (copy_from_user(buffer, buf, count))
+		return -EFAULT;
+	oom_adjust = simple_strtol(buffer, &end, 0);
+	if (oom_adjust < -16 || oom_adjust > 15)
+		return -EINVAL;
+	if (*end == '\n')
+		end++;
+	task->oomkilladj = oom_adjust;
+	if (end - buffer == 0)
+		return -EIO;
+	return end - buffer;
+}
+
+static struct file_operations proc_oom_adjust_operations = {
+	.read		= oom_adjust_read,
+	.write		= oom_adjust_write,
+};
+
+static struct inode_operations proc_mem_inode_operations = {
+	.permission	= proc_permission,
+};
+
+#ifdef CONFIG_AUDITSYSCALL
+#define TMPBUFLEN 21
+static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
+				  size_t count, loff_t *ppos)
+{
+	struct inode * inode = file->f_dentry->d_inode;
+	struct task_struct *task = proc_task(inode);
+	ssize_t length;
+	char tmpbuf[TMPBUFLEN];
+
+	length = scnprintf(tmpbuf, TMPBUFLEN, "%u",
+				audit_get_loginuid(task->audit_context));
+	return simple_read_from_buffer(buf, count, ppos, tmpbuf, length);
+}
+
+static ssize_t proc_loginuid_write(struct file * file, const char __user * buf,
+				   size_t count, loff_t *ppos)
+{
+	struct inode * inode = file->f_dentry->d_inode;
+	char *page, *tmp;
+	ssize_t length;
+	struct task_struct *task = proc_task(inode);
+	uid_t loginuid;
+
+	if (!capable(CAP_AUDIT_CONTROL))
+		return -EPERM;
+
+	if (current != task)
+		return -EPERM;
+
+	if (count > PAGE_SIZE)
+		count = PAGE_SIZE;
+
+	if (*ppos != 0) {
+		/* No partial writes. */
+		return -EINVAL;
+	}
+	page = (char*)__get_free_page(GFP_USER);
+	if (!page)
+		return -ENOMEM;
+	length = -EFAULT;
+	if (copy_from_user(page, buf, count))
+		goto out_free_page;
+
+	loginuid = simple_strtoul(page, &tmp, 10);
+	if (tmp == page) {
+		length = -EINVAL;
+		goto out_free_page;
+
+	}
+	length = audit_set_loginuid(task->audit_context, loginuid);
+	if (likely(length == 0))
+		length = count;
+
+out_free_page:
+	free_page((unsigned long) page);
+	return length;
+}
+
+static struct file_operations proc_loginuid_operations = {
+	.read		= proc_loginuid_read,
+	.write		= proc_loginuid_write,
+};
+#endif
+
+#ifdef CONFIG_SECCOMP
+static ssize_t seccomp_read(struct file *file, char __user *buf,
+			    size_t count, loff_t *ppos)
+{
+	struct task_struct *tsk = proc_task(file->f_dentry->d_inode);
+	char __buf[20];
+	loff_t __ppos = *ppos;
+	size_t len;
+
+	/* no need to print the trailing zero, so use only len */
+	len = sprintf(__buf, "%u\n", tsk->seccomp.mode);
+	if (__ppos >= len)
+		return 0;
+	if (count > len - __ppos)
+		count = len - __ppos;
+	if (copy_to_user(buf, __buf + __ppos, count))
+		return -EFAULT;
+	*ppos = __ppos + count;
+	return count;
+}
+
+static ssize_t seccomp_write(struct file *file, const char __user *buf,
+			     size_t count, loff_t *ppos)
+{
+	struct task_struct *tsk = proc_task(file->f_dentry->d_inode);
+	char __buf[20], *end;
+	unsigned int seccomp_mode;
+
+	/* can set it only once to be even more secure */
+	if (unlikely(tsk->seccomp.mode))
+		return -EPERM;
+
+	memset(__buf, 0, sizeof(__buf));
+	count = min(count, sizeof(__buf) - 1);
+	if (copy_from_user(__buf, buf, count))
+		return -EFAULT;
+	seccomp_mode = simple_strtoul(__buf, &end, 0);
+	if (*end == '\n')
+		end++;
+	if (seccomp_mode && seccomp_mode <= NR_SECCOMP_MODES) {
+		tsk->seccomp.mode = seccomp_mode;
+		set_tsk_thread_flag(tsk, TIF_SECCOMP);
+	} else
+		return -EINVAL;
+	if (unlikely(!(end - __buf)))
+		return -EIO;
+	return end - __buf;
+}
+
+static struct file_operations proc_seccomp_operations = {
+	.read		= seccomp_read,
+	.write		= seccomp_write,
+};
+#endif /* CONFIG_SECCOMP */
+
+static int proc_pid_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+	struct inode *inode = dentry->d_inode;
+	int error = -EACCES;
+
+	/* We don't need a base pointer in the /proc filesystem */
+	path_release(nd);
+
+	if (current->fsuid != inode->i_uid && !capable(CAP_DAC_OVERRIDE))
+		goto out;
+	error = proc_check_root(inode);
+	if (error)
+		goto out;
+
+	error = PROC_I(inode)->op.proc_get_link(inode, &nd->dentry, &nd->mnt);
+	nd->last_type = LAST_BIND;
+out:
+	return error;
+}
+
+static int do_proc_readlink(struct dentry *dentry, struct vfsmount *mnt,
+			    char __user *buffer, int buflen)
+{
+	struct inode * inode;
+	char *tmp = (char*)__get_free_page(GFP_KERNEL), *path;
+	int len;
+
+	if (!tmp)
+		return -ENOMEM;
+		
+	inode = dentry->d_inode;
+	path = d_path(dentry, mnt, tmp, PAGE_SIZE);
+	len = PTR_ERR(path);
+	if (IS_ERR(path))
+		goto out;
+	len = tmp + PAGE_SIZE - 1 - path;
+
+	if (len > buflen)
+		len = buflen;
+	if (copy_to_user(buffer, path, len))
+		len = -EFAULT;
+ out:
+	free_page((unsigned long)tmp);
+	return len;
+}
+
+static int proc_pid_readlink(struct dentry * dentry, char __user * buffer, int buflen)
+{
+	int error = -EACCES;
+	struct inode *inode = dentry->d_inode;
+	struct dentry *de;
+	struct vfsmount *mnt = NULL;
+
+	lock_kernel();
+
+	if (current->fsuid != inode->i_uid && !capable(CAP_DAC_OVERRIDE))
+		goto out;
+	error = proc_check_root(inode);
+	if (error)
+		goto out;
+
+	error = PROC_I(inode)->op.proc_get_link(inode, &de, &mnt);
+	if (error)
+		goto out;
+
+	error = do_proc_readlink(de, mnt, buffer, buflen);
+	dput(de);
+	mntput(mnt);
+out:
+	unlock_kernel();
+	return error;
+}
+
+static struct inode_operations proc_pid_link_inode_operations = {
+	.readlink	= proc_pid_readlink,
+	.follow_link	= proc_pid_follow_link
+};
+
+#define NUMBUF 10
+
+static int proc_readfd(struct file * filp, void * dirent, filldir_t filldir)
+{
+	struct inode *inode = filp->f_dentry->d_inode;
+	struct task_struct *p = proc_task(inode);
+	unsigned int fd, tid, ino;
+	int retval;
+	char buf[NUMBUF];
+	struct files_struct * files;
+
+	retval = -ENOENT;
+	if (!pid_alive(p))
+		goto out;
+	retval = 0;
+	tid = p->pid;
+
+	fd = filp->f_pos;
+	switch (fd) {
+		case 0:
+			if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
+				goto out;
+			filp->f_pos++;
+		case 1:
+			ino = fake_ino(tid, PROC_TID_INO);
+			if (filldir(dirent, "..", 2, 1, ino, DT_DIR) < 0)
+				goto out;
+			filp->f_pos++;
+		default:
+			files = get_files_struct(p);
+			if (!files)
+				goto out;
+			spin_lock(&files->file_lock);
+			for (fd = filp->f_pos-2;
+			     fd < files->max_fds;
+			     fd++, filp->f_pos++) {
+				unsigned int i,j;
+
+				if (!fcheck_files(files, fd))
+					continue;
+				spin_unlock(&files->file_lock);
+
+				j = NUMBUF;
+				i = fd;
+				do {
+					j--;
+					buf[j] = '0' + (i % 10);
+					i /= 10;
+				} while (i);
+
+				ino = fake_ino(tid, PROC_TID_FD_DIR + fd);
+				if (filldir(dirent, buf+j, NUMBUF-j, fd+2, ino, DT_LNK) < 0) {
+					spin_lock(&files->file_lock);
+					break;
+				}
+				spin_lock(&files->file_lock);
+			}
+			spin_unlock(&files->file_lock);
+			put_files_struct(files);
+	}
+out:
+	return retval;
+}
+
+static int proc_pident_readdir(struct file *filp,
+		void *dirent, filldir_t filldir,
+		struct pid_entry *ents, unsigned int nents)
+{
+	int i;
+	int pid;
+	struct dentry *dentry = filp->f_dentry;
+	struct inode *inode = dentry->d_inode;
+	struct pid_entry *p;
+	ino_t ino;
+	int ret;
+
+	ret = -ENOENT;
+	if (!pid_alive(proc_task(inode)))
+		goto out;
+
+	ret = 0;
+	pid = proc_task(inode)->pid;
+	i = filp->f_pos;
+	switch (i) {
+	case 0:
+		ino = inode->i_ino;
+		if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
+			goto out;
+		i++;
+		filp->f_pos++;
+		/* fall through */
+	case 1:
+		ino = parent_ino(dentry);
+		if (filldir(dirent, "..", 2, i, ino, DT_DIR) < 0)
+			goto out;
+		i++;
+		filp->f_pos++;
+		/* fall through */
+	default:
+		i -= 2;
+		if (i >= nents) {
+			ret = 1;
+			goto out;
+		}
+		p = ents + i;
+		while (p->name) {
+			if (filldir(dirent, p->name, p->len, filp->f_pos,
+				    fake_ino(pid, p->type), p->mode >> 12) < 0)
+				goto out;
+			filp->f_pos++;
+			p++;
+		}
+	}
+
+	ret = 1;
+out:
+	return ret;
+}
+
+static int proc_tgid_base_readdir(struct file * filp,
+			     void * dirent, filldir_t filldir)
+{
+	return proc_pident_readdir(filp,dirent,filldir,
+				   tgid_base_stuff,ARRAY_SIZE(tgid_base_stuff));
+}
+
+static int proc_tid_base_readdir(struct file * filp,
+			     void * dirent, filldir_t filldir)
+{
+	return proc_pident_readdir(filp,dirent,filldir,
+				   tid_base_stuff,ARRAY_SIZE(tid_base_stuff));
+}
+
+/* building an inode */
+
+static int task_dumpable(struct task_struct *task)
+{
+	int dumpable = 0;
+	struct mm_struct *mm;
+
+	task_lock(task);
+	mm = task->mm;
+	if (mm)
+		dumpable = mm->dumpable;
+	task_unlock(task);
+	return dumpable;
+}
+
+
+static struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task, int ino)
+{
+	struct inode * inode;
+	struct proc_inode *ei;
+
+	/* We need a new inode */
+	
+	inode = new_inode(sb);
+	if (!inode)
+		goto out;
+
+	/* Common stuff */
+	ei = PROC_I(inode);
+	ei->task = NULL;
+	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+	inode->i_ino = fake_ino(task->pid, ino);
+
+	if (!pid_alive(task))
+		goto out_unlock;
+
+	/*
+	 * grab the reference to task.
+	 */
+	get_task_struct(task);
+	ei->task = task;
+	ei->type = ino;
+	inode->i_uid = 0;
+	inode->i_gid = 0;
+	if (ino == PROC_TGID_INO || ino == PROC_TID_INO || task_dumpable(task)) {
+		inode->i_uid = task->euid;
+		inode->i_gid = task->egid;
+	}
+	security_task_to_inode(task, inode);
+
+out:
+	return inode;
+
+out_unlock:
+	ei->pde = NULL;
+	iput(inode);
+	return NULL;
+}
+
+/* dentry stuff */
+
+/*
+ *	Exceptional case: normally we are not allowed to unhash a busy
+ * directory. In this case, however, we can do it - no aliasing problems
+ * due to the way we treat inodes.
+ *
+ * Rewrite the inode's ownerships here because the owning task may have
+ * performed a setuid(), etc.
+ */
+static int pid_revalidate(struct dentry *dentry, struct nameidata *nd)
+{
+	struct inode *inode = dentry->d_inode;
+	struct task_struct *task = proc_task(inode);
+	if (pid_alive(task)) {
+		if (proc_type(inode) == PROC_TGID_INO || proc_type(inode) == PROC_TID_INO || task_dumpable(task)) {
+			inode->i_uid = task->euid;
+			inode->i_gid = task->egid;
+		} else {
+			inode->i_uid = 0;
+			inode->i_gid = 0;
+		}
+		security_task_to_inode(task, inode);
+		return 1;
+	}
+	d_drop(dentry);
+	return 0;
+}
+
+static int tid_fd_revalidate(struct dentry *dentry, struct nameidata *nd)
+{
+	struct inode *inode = dentry->d_inode;
+	struct task_struct *task = proc_task(inode);
+	int fd = proc_type(inode) - PROC_TID_FD_DIR;
+	struct files_struct *files;
+
+	files = get_files_struct(task);
+	if (files) {
+		spin_lock(&files->file_lock);
+		if (fcheck_files(files, fd)) {
+			spin_unlock(&files->file_lock);
+			put_files_struct(files);
+			if (task_dumpable(task)) {
+				inode->i_uid = task->euid;
+				inode->i_gid = task->egid;
+			} else {
+				inode->i_uid = 0;
+				inode->i_gid = 0;
+			}
+			security_task_to_inode(task, inode);
+			return 1;
+		}
+		spin_unlock(&files->file_lock);
+		put_files_struct(files);
+	}
+	d_drop(dentry);
+	return 0;
+}
+
+static void pid_base_iput(struct dentry *dentry, struct inode *inode)
+{
+	struct task_struct *task = proc_task(inode);
+	spin_lock(&task->proc_lock);
+	if (task->proc_dentry == dentry)
+		task->proc_dentry = NULL;
+	spin_unlock(&task->proc_lock);
+	iput(inode);
+}
+
+static int pid_delete_dentry(struct dentry * dentry)
+{
+	/* Is the task we represent dead?
+	 * If so, then don't put the dentry on the lru list,
+	 * kill it immediately.
+	 */
+	return !pid_alive(proc_task(dentry->d_inode));
+}
+
+static struct dentry_operations tid_fd_dentry_operations =
+{
+	.d_revalidate	= tid_fd_revalidate,
+	.d_delete	= pid_delete_dentry,
+};
+
+static struct dentry_operations pid_dentry_operations =
+{
+	.d_revalidate	= pid_revalidate,
+	.d_delete	= pid_delete_dentry,
+};
+
+static struct dentry_operations pid_base_dentry_operations =
+{
+	.d_revalidate	= pid_revalidate,
+	.d_iput		= pid_base_iput,
+	.d_delete	= pid_delete_dentry,
+};
+
+/* Lookups */
+
+static unsigned name_to_int(struct dentry *dentry)
+{
+	const char *name = dentry->d_name.name;
+	int len = dentry->d_name.len;
+	unsigned n = 0;
+
+	if (len > 1 && *name == '0')
+		goto out;
+	while (len-- > 0) {
+		unsigned c = *name++ - '0';
+		if (c > 9)
+			goto out;
+		if (n >= (~0U-9)/10)
+			goto out;
+		n *= 10;
+		n += c;
+	}
+	return n;
+out:
+	return ~0U;
+}
+
+/* SMP-safe */
+static struct dentry *proc_lookupfd(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+{
+	struct task_struct *task = proc_task(dir);
+	unsigned fd = name_to_int(dentry);
+	struct file * file;
+	struct files_struct * files;
+	struct inode *inode;
+	struct proc_inode *ei;
+
+	if (fd == ~0U)
+		goto out;
+	if (!pid_alive(task))
+		goto out;
+
+	inode = proc_pid_make_inode(dir->i_sb, task, PROC_TID_FD_DIR+fd);
+	if (!inode)
+		goto out;
+	ei = PROC_I(inode);
+	files = get_files_struct(task);
+	if (!files)
+		goto out_unlock;
+	inode->i_mode = S_IFLNK;
+	spin_lock(&files->file_lock);
+	file = fcheck_files(files, fd);
+	if (!file)
+		goto out_unlock2;
+	if (file->f_mode & 1)
+		inode->i_mode |= S_IRUSR | S_IXUSR;
+	if (file->f_mode & 2)
+		inode->i_mode |= S_IWUSR | S_IXUSR;
+	spin_unlock(&files->file_lock);
+	put_files_struct(files);
+	inode->i_op = &proc_pid_link_inode_operations;
+	inode->i_size = 64;
+	ei->op.proc_get_link = proc_fd_link;
+	dentry->d_op = &tid_fd_dentry_operations;
+	d_add(dentry, inode);
+	return NULL;
+
+out_unlock2:
+	spin_unlock(&files->file_lock);
+	put_files_struct(files);
+out_unlock:
+	iput(inode);
+out:
+	return ERR_PTR(-ENOENT);
+}
+
+static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldir);
+static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd);
+
+static struct file_operations proc_fd_operations = {
+	.read		= generic_read_dir,
+	.readdir	= proc_readfd,
+};
+
+static struct file_operations proc_task_operations = {
+	.read		= generic_read_dir,
+	.readdir	= proc_task_readdir,
+};
+
+/*
+ * proc directories can do almost nothing..
+ */
+static struct inode_operations proc_fd_inode_operations = {
+	.lookup		= proc_lookupfd,
+	.permission	= proc_permission,
+};
+
+static struct inode_operations proc_task_inode_operations = {
+	.lookup		= proc_task_lookup,
+	.permission	= proc_permission,
+};
+
+#ifdef CONFIG_SECURITY
+static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
+				  size_t count, loff_t *ppos)
+{
+	struct inode * inode = file->f_dentry->d_inode;
+	unsigned long page;
+	ssize_t length;
+	struct task_struct *task = proc_task(inode);
+
+	if (count > PAGE_SIZE)
+		count = PAGE_SIZE;
+	if (!(page = __get_free_page(GFP_KERNEL)))
+		return -ENOMEM;
+
+	length = security_getprocattr(task, 
+				      (char*)file->f_dentry->d_name.name, 
+				      (void*)page, count);
+	if (length >= 0)
+		length = simple_read_from_buffer(buf, count, ppos, (char *)page, length);
+	free_page(page);
+	return length;
+}
+
+static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
+				   size_t count, loff_t *ppos)
+{ 
+	struct inode * inode = file->f_dentry->d_inode;
+	char *page; 
+	ssize_t length; 
+	struct task_struct *task = proc_task(inode); 
+
+	if (count > PAGE_SIZE) 
+		count = PAGE_SIZE; 
+	if (*ppos != 0) {
+		/* No partial writes. */
+		return -EINVAL;
+	}
+	page = (char*)__get_free_page(GFP_USER); 
+	if (!page) 
+		return -ENOMEM;
+	length = -EFAULT; 
+	if (copy_from_user(page, buf, count)) 
+		goto out;
+
+	length = security_setprocattr(task, 
+				      (char*)file->f_dentry->d_name.name, 
+				      (void*)page, count);
+out:
+	free_page((unsigned long) page);
+	return length;
+} 
+
+static struct file_operations proc_pid_attr_operations = {
+	.read		= proc_pid_attr_read,
+	.write		= proc_pid_attr_write,
+};
+
+static struct file_operations proc_tid_attr_operations;
+static struct inode_operations proc_tid_attr_inode_operations;
+static struct file_operations proc_tgid_attr_operations;
+static struct inode_operations proc_tgid_attr_inode_operations;
+#endif
+
+/* SMP-safe */
+static struct dentry *proc_pident_lookup(struct inode *dir, 
+					 struct dentry *dentry,
+					 struct pid_entry *ents)
+{
+	struct inode *inode;
+	int error;
+	struct task_struct *task = proc_task(dir);
+	struct pid_entry *p;
+	struct proc_inode *ei;
+
+	error = -ENOENT;
+	inode = NULL;
+
+	if (!pid_alive(task))
+		goto out;
+
+	for (p = ents; p->name; p++) {
+		if (p->len != dentry->d_name.len)
+			continue;
+		if (!memcmp(dentry->d_name.name, p->name, p->len))
+			break;
+	}
+	if (!p->name)
+		goto out;
+
+	error = -EINVAL;
+	inode = proc_pid_make_inode(dir->i_sb, task, p->type);
+	if (!inode)
+		goto out;
+
+	ei = PROC_I(inode);
+	inode->i_mode = p->mode;
+	/*
+	 * Yes, it does not scale. And it should not. Don't add
+	 * new entries into /proc/<tgid>/ without very good reasons.
+	 */
+	switch(p->type) {
+		case PROC_TGID_TASK:
+			inode->i_nlink = 3;
+			inode->i_op = &proc_task_inode_operations;
+			inode->i_fop = &proc_task_operations;
+			break;
+		case PROC_TID_FD:
+		case PROC_TGID_FD:
+			inode->i_nlink = 2;
+			inode->i_op = &proc_fd_inode_operations;
+			inode->i_fop = &proc_fd_operations;
+			break;
+		case PROC_TID_EXE:
+		case PROC_TGID_EXE:
+			inode->i_op = &proc_pid_link_inode_operations;
+			ei->op.proc_get_link = proc_exe_link;
+			break;
+		case PROC_TID_CWD:
+		case PROC_TGID_CWD:
+			inode->i_op = &proc_pid_link_inode_operations;
+			ei->op.proc_get_link = proc_cwd_link;
+			break;
+		case PROC_TID_ROOT:
+		case PROC_TGID_ROOT:
+			inode->i_op = &proc_pid_link_inode_operations;
+			ei->op.proc_get_link = proc_root_link;
+			break;
+		case PROC_TID_ENVIRON:
+		case PROC_TGID_ENVIRON:
+			inode->i_fop = &proc_info_file_operations;
+			ei->op.proc_read = proc_pid_environ;
+			break;
+		case PROC_TID_AUXV:
+		case PROC_TGID_AUXV:
+			inode->i_fop = &proc_info_file_operations;
+			ei->op.proc_read = proc_pid_auxv;
+			break;
+		case PROC_TID_STATUS:
+		case PROC_TGID_STATUS:
+			inode->i_fop = &proc_info_file_operations;
+			ei->op.proc_read = proc_pid_status;
+			break;
+		case PROC_TID_STAT:
+			inode->i_fop = &proc_info_file_operations;
+			ei->op.proc_read = proc_tid_stat;
+			break;
+		case PROC_TGID_STAT:
+			inode->i_fop = &proc_info_file_operations;
+			ei->op.proc_read = proc_tgid_stat;
+			break;
+		case PROC_TID_CMDLINE:
+		case PROC_TGID_CMDLINE:
+			inode->i_fop = &proc_info_file_operations;
+			ei->op.proc_read = proc_pid_cmdline;
+			break;
+		case PROC_TID_STATM:
+		case PROC_TGID_STATM:
+			inode->i_fop = &proc_info_file_operations;
+			ei->op.proc_read = proc_pid_statm;
+			break;
+		case PROC_TID_MAPS:
+		case PROC_TGID_MAPS:
+			inode->i_fop = &proc_maps_operations;
+			break;
+		case PROC_TID_MEM:
+		case PROC_TGID_MEM:
+			inode->i_op = &proc_mem_inode_operations;
+			inode->i_fop = &proc_mem_operations;
+			break;
+#ifdef CONFIG_SECCOMP
+		case PROC_TID_SECCOMP:
+		case PROC_TGID_SECCOMP:
+			inode->i_fop = &proc_seccomp_operations;
+			break;
+#endif /* CONFIG_SECCOMP */
+		case PROC_TID_MOUNTS:
+		case PROC_TGID_MOUNTS:
+			inode->i_fop = &proc_mounts_operations;
+			break;
+#ifdef CONFIG_SECURITY
+		case PROC_TID_ATTR:
+			inode->i_nlink = 2;
+			inode->i_op = &proc_tid_attr_inode_operations;
+			inode->i_fop = &proc_tid_attr_operations;
+			break;
+		case PROC_TGID_ATTR:
+			inode->i_nlink = 2;
+			inode->i_op = &proc_tgid_attr_inode_operations;
+			inode->i_fop = &proc_tgid_attr_operations;
+			break;
+		case PROC_TID_ATTR_CURRENT:
+		case PROC_TGID_ATTR_CURRENT:
+		case PROC_TID_ATTR_PREV:
+		case PROC_TGID_ATTR_PREV:
+		case PROC_TID_ATTR_EXEC:
+		case PROC_TGID_ATTR_EXEC:
+		case PROC_TID_ATTR_FSCREATE:
+		case PROC_TGID_ATTR_FSCREATE:
+			inode->i_fop = &proc_pid_attr_operations;
+			break;
+#endif
+#ifdef CONFIG_KALLSYMS
+		case PROC_TID_WCHAN:
+		case PROC_TGID_WCHAN:
+			inode->i_fop = &proc_info_file_operations;
+			ei->op.proc_read = proc_pid_wchan;
+			break;
+#endif
+#ifdef CONFIG_SCHEDSTATS
+		case PROC_TID_SCHEDSTAT:
+		case PROC_TGID_SCHEDSTAT:
+			inode->i_fop = &proc_info_file_operations;
+			ei->op.proc_read = proc_pid_schedstat;
+			break;
+#endif
+#ifdef CONFIG_CPUSETS
+		case PROC_TID_CPUSET:
+		case PROC_TGID_CPUSET:
+			inode->i_fop = &proc_cpuset_operations;
+			break;
+#endif
+		case PROC_TID_OOM_SCORE:
+		case PROC_TGID_OOM_SCORE:
+			inode->i_fop = &proc_info_file_operations;
+			ei->op.proc_read = proc_oom_score;
+			break;
+		case PROC_TID_OOM_ADJUST:
+		case PROC_TGID_OOM_ADJUST:
+			inode->i_fop = &proc_oom_adjust_operations;
+			break;
+#ifdef CONFIG_AUDITSYSCALL
+		case PROC_TID_LOGINUID:
+		case PROC_TGID_LOGINUID:
+			inode->i_fop = &proc_loginuid_operations;
+			break;
+#endif
+		default:
+			printk("procfs: impossible type (%d)",p->type);
+			iput(inode);
+			return ERR_PTR(-EINVAL);
+	}
+	dentry->d_op = &pid_dentry_operations;
+	d_add(dentry, inode);
+	return NULL;
+
+out:
+	return ERR_PTR(error);
+}
+
+static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
+	return proc_pident_lookup(dir, dentry, tgid_base_stuff);
+}
+
+static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd){
+	return proc_pident_lookup(dir, dentry, tid_base_stuff);
+}
+
+static struct file_operations proc_tgid_base_operations = {
+	.read		= generic_read_dir,
+	.readdir	= proc_tgid_base_readdir,
+};
+
+static struct file_operations proc_tid_base_operations = {
+	.read		= generic_read_dir,
+	.readdir	= proc_tid_base_readdir,
+};
+
+static struct inode_operations proc_tgid_base_inode_operations = {
+	.lookup		= proc_tgid_base_lookup,
+};
+
+static struct inode_operations proc_tid_base_inode_operations = {
+	.lookup		= proc_tid_base_lookup,
+};
+
+#ifdef CONFIG_SECURITY
+static int proc_tgid_attr_readdir(struct file * filp,
+			     void * dirent, filldir_t filldir)
+{
+	return proc_pident_readdir(filp,dirent,filldir,
+				   tgid_attr_stuff,ARRAY_SIZE(tgid_attr_stuff));
+}
+
+static int proc_tid_attr_readdir(struct file * filp,
+			     void * dirent, filldir_t filldir)
+{
+	return proc_pident_readdir(filp,dirent,filldir,
+				   tid_attr_stuff,ARRAY_SIZE(tid_attr_stuff));
+}
+
+static struct file_operations proc_tgid_attr_operations = {
+	.read		= generic_read_dir,
+	.readdir	= proc_tgid_attr_readdir,
+};
+
+static struct file_operations proc_tid_attr_operations = {
+	.read		= generic_read_dir,
+	.readdir	= proc_tid_attr_readdir,
+};
+
+static struct dentry *proc_tgid_attr_lookup(struct inode *dir,
+				struct dentry *dentry, struct nameidata *nd)
+{
+	return proc_pident_lookup(dir, dentry, tgid_attr_stuff);
+}
+
+static struct dentry *proc_tid_attr_lookup(struct inode *dir,
+				struct dentry *dentry, struct nameidata *nd)
+{
+	return proc_pident_lookup(dir, dentry, tid_attr_stuff);
+}
+
+static struct inode_operations proc_tgid_attr_inode_operations = {
+	.lookup		= proc_tgid_attr_lookup,
+};
+
+static struct inode_operations proc_tid_attr_inode_operations = {
+	.lookup		= proc_tid_attr_lookup,
+};
+#endif
+
+/*
+ * /proc/self:
+ */
+static int proc_self_readlink(struct dentry *dentry, char __user *buffer,
+			      int buflen)
+{
+	char tmp[30];
+	sprintf(tmp, "%d", current->tgid);
+	return vfs_readlink(dentry,buffer,buflen,tmp);
+}
+
+static int proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+	char tmp[30];
+	sprintf(tmp, "%d", current->tgid);
+	return vfs_follow_link(nd,tmp);
+}	
+
+static struct inode_operations proc_self_inode_operations = {
+	.readlink	= proc_self_readlink,
+	.follow_link	= proc_self_follow_link,
+};
+
+/**
+ * proc_pid_unhash -  Unhash /proc/<pid> entry from the dcache.
+ * @p: task that should be flushed.
+ *
+ * Drops the /proc/<pid> dcache entry from the hash chains.
+ *
+ * Dropping /proc/<pid> entries and detach_pid must be synchroneous,
+ * otherwise e.g. /proc/<pid>/exe might point to the wrong executable,
+ * if the pid value is immediately reused. This is enforced by
+ * - caller must acquire spin_lock(p->proc_lock)
+ * - must be called before detach_pid()
+ * - proc_pid_lookup acquires proc_lock, and checks that
+ *   the target is not dead by looking at the attach count
+ *   of PIDTYPE_PID.
+ */
+
+struct dentry *proc_pid_unhash(struct task_struct *p)
+{
+	struct dentry *proc_dentry;
+
+	proc_dentry = p->proc_dentry;
+	if (proc_dentry != NULL) {
+
+		spin_lock(&dcache_lock);
+		spin_lock(&proc_dentry->d_lock);
+		if (!d_unhashed(proc_dentry)) {
+			dget_locked(proc_dentry);
+			__d_drop(proc_dentry);
+			spin_unlock(&proc_dentry->d_lock);
+		} else {
+			spin_unlock(&proc_dentry->d_lock);
+			proc_dentry = NULL;
+		}
+		spin_unlock(&dcache_lock);
+	}
+	return proc_dentry;
+}
+
+/**
+ * proc_pid_flush - recover memory used by stale /proc/<pid>/x entries
+ * @proc_entry: directoy to prune.
+ *
+ * Shrink the /proc directory that was used by the just killed thread.
+ */
+	
+void proc_pid_flush(struct dentry *proc_dentry)
+{
+	might_sleep();
+	if(proc_dentry != NULL) {
+		shrink_dcache_parent(proc_dentry);
+		dput(proc_dentry);
+	}
+}
+
+/* SMP-safe */
+struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+{
+	struct task_struct *task;
+	struct inode *inode;
+	struct proc_inode *ei;
+	unsigned tgid;
+	int died;
+
+	if (dentry->d_name.len == 4 && !memcmp(dentry->d_name.name,"self",4)) {
+		inode = new_inode(dir->i_sb);
+		if (!inode)
+			return ERR_PTR(-ENOMEM);
+		ei = PROC_I(inode);
+		inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+		inode->i_ino = fake_ino(0, PROC_TGID_INO);
+		ei->pde = NULL;
+		inode->i_mode = S_IFLNK|S_IRWXUGO;
+		inode->i_uid = inode->i_gid = 0;
+		inode->i_size = 64;
+		inode->i_op = &proc_self_inode_operations;
+		d_add(dentry, inode);
+		return NULL;
+	}
+	tgid = name_to_int(dentry);
+	if (tgid == ~0U)
+		goto out;
+
+	read_lock(&tasklist_lock);
+	task = find_task_by_pid(tgid);
+	if (task)
+		get_task_struct(task);
+	read_unlock(&tasklist_lock);
+	if (!task)
+		goto out;
+
+	inode = proc_pid_make_inode(dir->i_sb, task, PROC_TGID_INO);
+
+
+	if (!inode) {
+		put_task_struct(task);
+		goto out;
+	}
+	inode->i_mode = S_IFDIR|S_IRUGO|S_IXUGO;
+	inode->i_op = &proc_tgid_base_inode_operations;
+	inode->i_fop = &proc_tgid_base_operations;
+	inode->i_nlink = 3;
+	inode->i_flags|=S_IMMUTABLE;
+
+	dentry->d_op = &pid_base_dentry_operations;
+
+	died = 0;
+	d_add(dentry, inode);
+	spin_lock(&task->proc_lock);
+	task->proc_dentry = dentry;
+	if (!pid_alive(task)) {
+		dentry = proc_pid_unhash(task);
+		died = 1;
+	}
+	spin_unlock(&task->proc_lock);
+
+	put_task_struct(task);
+	if (died) {
+		proc_pid_flush(dentry);
+		goto out;
+	}
+	return NULL;
+out:
+	return ERR_PTR(-ENOENT);
+}
+
+/* SMP-safe */
+static struct dentry *proc_task_lookup(struct inode *dir, struct dentry * dentry, struct nameidata *nd)
+{
+	struct task_struct *task;
+	struct task_struct *leader = proc_task(dir);
+	struct inode *inode;
+	unsigned tid;
+
+	tid = name_to_int(dentry);
+	if (tid == ~0U)
+		goto out;
+
+	read_lock(&tasklist_lock);
+	task = find_task_by_pid(tid);
+	if (task)
+		get_task_struct(task);
+	read_unlock(&tasklist_lock);
+	if (!task)
+		goto out;
+	if (leader->tgid != task->tgid)
+		goto out_drop_task;
+
+	inode = proc_pid_make_inode(dir->i_sb, task, PROC_TID_INO);
+
+
+	if (!inode)
+		goto out_drop_task;
+	inode->i_mode = S_IFDIR|S_IRUGO|S_IXUGO;
+	inode->i_op = &proc_tid_base_inode_operations;
+	inode->i_fop = &proc_tid_base_operations;
+	inode->i_nlink = 3;
+	inode->i_flags|=S_IMMUTABLE;
+
+	dentry->d_op = &pid_base_dentry_operations;
+
+	d_add(dentry, inode);
+
+	put_task_struct(task);
+	return NULL;
+out_drop_task:
+	put_task_struct(task);
+out:
+	return ERR_PTR(-ENOENT);
+}
+
+#define PROC_NUMBUF 10
+#define PROC_MAXPIDS 20
+
+/*
+ * Get a few tgid's to return for filldir - we need to hold the
+ * tasklist lock while doing this, and we must release it before
+ * we actually do the filldir itself, so we use a temp buffer..
+ */
+static int get_tgid_list(int index, unsigned long version, unsigned int *tgids)
+{
+	struct task_struct *p;
+	int nr_tgids = 0;
+
+	index--;
+	read_lock(&tasklist_lock);
+	p = NULL;
+	if (version) {
+		p = find_task_by_pid(version);
+		if (p && !thread_group_leader(p))
+			p = NULL;
+	}
+
+	if (p)
+		index = 0;
+	else
+		p = next_task(&init_task);
+
+	for ( ; p != &init_task; p = next_task(p)) {
+		int tgid = p->pid;
+		if (!pid_alive(p))
+			continue;
+		if (--index >= 0)
+			continue;
+		tgids[nr_tgids] = tgid;
+		nr_tgids++;
+		if (nr_tgids >= PROC_MAXPIDS)
+			break;
+	}
+	read_unlock(&tasklist_lock);
+	return nr_tgids;
+}
+
+/*
+ * Get a few tid's to return for filldir - we need to hold the
+ * tasklist lock while doing this, and we must release it before
+ * we actually do the filldir itself, so we use a temp buffer..
+ */
+static int get_tid_list(int index, unsigned int *tids, struct inode *dir)
+{
+	struct task_struct *leader_task = proc_task(dir);
+	struct task_struct *task = leader_task;
+	int nr_tids = 0;
+
+	index -= 2;
+	read_lock(&tasklist_lock);
+	/*
+	 * The starting point task (leader_task) might be an already
+	 * unlinked task, which cannot be used to access the task-list
+	 * via next_thread().
+	 */
+	if (pid_alive(task)) do {
+		int tid = task->pid;
+
+		if (--index >= 0)
+			continue;
+		tids[nr_tids] = tid;
+		nr_tids++;
+		if (nr_tids >= PROC_MAXPIDS)
+			break;
+	} while ((task = next_thread(task)) != leader_task);
+	read_unlock(&tasklist_lock);
+	return nr_tids;
+}
+
+/* for the /proc/ directory itself, after non-process stuff has been done */
+int proc_pid_readdir(struct file * filp, void * dirent, filldir_t filldir)
+{
+	unsigned int tgid_array[PROC_MAXPIDS];
+	char buf[PROC_NUMBUF];
+	unsigned int nr = filp->f_pos - FIRST_PROCESS_ENTRY;
+	unsigned int nr_tgids, i;
+	int next_tgid;
+
+	if (!nr) {
+		ino_t ino = fake_ino(0,PROC_TGID_INO);
+		if (filldir(dirent, "self", 4, filp->f_pos, ino, DT_LNK) < 0)
+			return 0;
+		filp->f_pos++;
+		nr++;
+	}
+
+	/* f_version caches the tgid value that the last readdir call couldn't
+	 * return. lseek aka telldir automagically resets f_version to 0.
+	 */
+	next_tgid = filp->f_version;
+	filp->f_version = 0;
+	for (;;) {
+		nr_tgids = get_tgid_list(nr, next_tgid, tgid_array);
+		if (!nr_tgids) {
+			/* no more entries ! */
+			break;
+		}
+		next_tgid = 0;
+
+		/* do not use the last found pid, reserve it for next_tgid */
+		if (nr_tgids == PROC_MAXPIDS) {
+			nr_tgids--;
+			next_tgid = tgid_array[nr_tgids];
+		}
+
+		for (i=0;i<nr_tgids;i++) {
+			int tgid = tgid_array[i];
+			ino_t ino = fake_ino(tgid,PROC_TGID_INO);
+			unsigned long j = PROC_NUMBUF;
+
+			do
+				buf[--j] = '0' + (tgid % 10);
+			while ((tgid /= 10) != 0);
+
+			if (filldir(dirent, buf+j, PROC_NUMBUF-j, filp->f_pos, ino, DT_DIR) < 0) {
+				/* returning this tgid failed, save it as the first
+				 * pid for the next readir call */
+				filp->f_version = tgid_array[i];
+				goto out;
+			}
+			filp->f_pos++;
+			nr++;
+		}
+	}
+out:
+	return 0;
+}
+
+/* for the /proc/TGID/task/ directories */
+static int proc_task_readdir(struct file * filp, void * dirent, filldir_t filldir)
+{
+	unsigned int tid_array[PROC_MAXPIDS];
+	char buf[PROC_NUMBUF];
+	unsigned int nr_tids, i;
+	struct dentry *dentry = filp->f_dentry;
+	struct inode *inode = dentry->d_inode;
+	int retval = -ENOENT;
+	ino_t ino;
+	unsigned long pos = filp->f_pos;  /* avoiding "long long" filp->f_pos */
+
+	if (!pid_alive(proc_task(inode)))
+		goto out;
+	retval = 0;
+
+	switch (pos) {
+	case 0:
+		ino = inode->i_ino;
+		if (filldir(dirent, ".", 1, pos, ino, DT_DIR) < 0)
+			goto out;
+		pos++;
+		/* fall through */
+	case 1:
+		ino = parent_ino(dentry);
+		if (filldir(dirent, "..", 2, pos, ino, DT_DIR) < 0)
+			goto out;
+		pos++;
+		/* fall through */
+	}
+
+	nr_tids = get_tid_list(pos, tid_array, inode);
+
+	for (i = 0; i < nr_tids; i++) {
+		unsigned long j = PROC_NUMBUF;
+		int tid = tid_array[i];
+
+		ino = fake_ino(tid,PROC_TID_INO);
+
+		do
+			buf[--j] = '0' + (tid % 10);
+		while ((tid /= 10) != 0);
+
+		if (filldir(dirent, buf+j, PROC_NUMBUF-j, pos, ino, DT_DIR) < 0)
+			break;
+		pos++;
+	}
+out:
+	filp->f_pos = pos;
+	return retval;
+}
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
new file mode 100644
index 0000000..6c6315d
--- /dev/null
+++ b/fs/proc/generic.c
@@ -0,0 +1,705 @@
+/*
+ * proc/fs/generic.c --- generic routines for the proc-fs
+ *
+ * This file contains generic proc-fs routines for handling
+ * directories and files.
+ * 
+ * Copyright (C) 1991, 1992 Linus Torvalds.
+ * Copyright (C) 1997 Theodore Ts'o
+ */
+
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/module.h>
+#include <linux/mount.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <linux/idr.h>
+#include <linux/namei.h>
+#include <linux/bitops.h>
+#include <asm/uaccess.h>
+
+static ssize_t proc_file_read(struct file *file, char __user *buf,
+			      size_t nbytes, loff_t *ppos);
+static ssize_t proc_file_write(struct file *file, const char __user *buffer,
+			       size_t count, loff_t *ppos);
+static loff_t proc_file_lseek(struct file *, loff_t, int);
+
+int proc_match(int len, const char *name, struct proc_dir_entry *de)
+{
+	if (de->namelen != len)
+		return 0;
+	return !memcmp(name, de->name, len);
+}
+
+static struct file_operations proc_file_operations = {
+	.llseek		= proc_file_lseek,
+	.read		= proc_file_read,
+	.write		= proc_file_write,
+};
+
+/* buffer size is one page but our output routines use some slack for overruns */
+#define PROC_BLOCK_SIZE	(PAGE_SIZE - 1024)
+
+static ssize_t
+proc_file_read(struct file *file, char __user *buf, size_t nbytes,
+	       loff_t *ppos)
+{
+	struct inode * inode = file->f_dentry->d_inode;
+	char 	*page;
+	ssize_t	retval=0;
+	int	eof=0;
+	ssize_t	n, count;
+	char	*start;
+	struct proc_dir_entry * dp;
+
+	dp = PDE(inode);
+	if (!(page = (char*) __get_free_page(GFP_KERNEL)))
+		return -ENOMEM;
+
+	while ((nbytes > 0) && !eof) {
+		count = min_t(size_t, PROC_BLOCK_SIZE, nbytes);
+
+		start = NULL;
+		if (dp->get_info) {
+			/* Handle old net routines */
+			n = dp->get_info(page, &start, *ppos, count);
+			if (n < count)
+				eof = 1;
+		} else if (dp->read_proc) {
+			/*
+			 * How to be a proc read function
+			 * ------------------------------
+			 * Prototype:
+			 *    int f(char *buffer, char **start, off_t offset,
+			 *          int count, int *peof, void *dat)
+			 *
+			 * Assume that the buffer is "count" bytes in size.
+			 *
+			 * If you know you have supplied all the data you
+			 * have, set *peof.
+			 *
+			 * You have three ways to return data:
+			 * 0) Leave *start = NULL.  (This is the default.)
+			 *    Put the data of the requested offset at that
+			 *    offset within the buffer.  Return the number (n)
+			 *    of bytes there are from the beginning of the
+			 *    buffer up to the last byte of data.  If the
+			 *    number of supplied bytes (= n - offset) is 
+			 *    greater than zero and you didn't signal eof
+			 *    and the reader is prepared to take more data
+			 *    you will be called again with the requested
+			 *    offset advanced by the number of bytes 
+			 *    absorbed.  This interface is useful for files
+			 *    no larger than the buffer.
+			 * 1) Set *start = an unsigned long value less than
+			 *    the buffer address but greater than zero.
+			 *    Put the data of the requested offset at the
+			 *    beginning of the buffer.  Return the number of
+			 *    bytes of data placed there.  If this number is
+			 *    greater than zero and you didn't signal eof
+			 *    and the reader is prepared to take more data
+			 *    you will be called again with the requested
+			 *    offset advanced by *start.  This interface is
+			 *    useful when you have a large file consisting
+			 *    of a series of blocks which you want to count
+			 *    and return as wholes.
+			 *    (Hack by Paul.Russell@rustcorp.com.au)
+			 * 2) Set *start = an address within the buffer.
+			 *    Put the data of the requested offset at *start.
+			 *    Return the number of bytes of data placed there.
+			 *    If this number is greater than zero and you
+			 *    didn't signal eof and the reader is prepared to
+			 *    take more data you will be called again with the
+			 *    requested offset advanced by the number of bytes
+			 *    absorbed.
+			 */
+			n = dp->read_proc(page, &start, *ppos,
+					  count, &eof, dp->data);
+		} else
+			break;
+
+		if (n == 0)   /* end of file */
+			break;
+		if (n < 0) {  /* error */
+			if (retval == 0)
+				retval = n;
+			break;
+		}
+
+		if (start == NULL) {
+			if (n > PAGE_SIZE) {
+				printk(KERN_ERR
+				       "proc_file_read: Apparent buffer overflow!\n");
+				n = PAGE_SIZE;
+			}
+			n -= *ppos;
+			if (n <= 0)
+				break;
+			if (n > count)
+				n = count;
+			start = page + *ppos;
+		} else if (start < page) {
+			if (n > PAGE_SIZE) {
+				printk(KERN_ERR
+				       "proc_file_read: Apparent buffer overflow!\n");
+				n = PAGE_SIZE;
+			}
+			if (n > count) {
+				/*
+				 * Don't reduce n because doing so might
+				 * cut off part of a data block.
+				 */
+				printk(KERN_WARNING
+				       "proc_file_read: Read count exceeded\n");
+			}
+		} else /* start >= page */ {
+			unsigned long startoff = (unsigned long)(start - page);
+			if (n > (PAGE_SIZE - startoff)) {
+				printk(KERN_ERR
+				       "proc_file_read: Apparent buffer overflow!\n");
+				n = PAGE_SIZE - startoff;
+			}
+			if (n > count)
+				n = count;
+		}
+		
+ 		n -= copy_to_user(buf, start < page ? page : start, n);
+		if (n == 0) {
+			if (retval == 0)
+				retval = -EFAULT;
+			break;
+		}
+
+		*ppos += start < page ? (unsigned long)start : n;
+		nbytes -= n;
+		buf += n;
+		retval += n;
+	}
+	free_page((unsigned long) page);
+	return retval;
+}
+
+static ssize_t
+proc_file_write(struct file *file, const char __user *buffer,
+		size_t count, loff_t *ppos)
+{
+	struct inode *inode = file->f_dentry->d_inode;
+	struct proc_dir_entry * dp;
+	
+	dp = PDE(inode);
+
+	if (!dp->write_proc)
+		return -EIO;
+
+	/* FIXME: does this routine need ppos?  probably... */
+	return dp->write_proc(file, buffer, count, dp->data);
+}
+
+
+static loff_t
+proc_file_lseek(struct file *file, loff_t offset, int orig)
+{
+    lock_kernel();
+
+    switch (orig) {
+    case 0:
+	if (offset < 0)
+	    goto out;
+	file->f_pos = offset;
+	unlock_kernel();
+	return(file->f_pos);
+    case 1:
+	if (offset + file->f_pos < 0)
+	    goto out;
+	file->f_pos += offset;
+	unlock_kernel();
+	return(file->f_pos);
+    case 2:
+	goto out;
+    default:
+	goto out;
+    }
+
+out:
+    unlock_kernel();
+    return -EINVAL;
+}
+
+static int proc_notify_change(struct dentry *dentry, struct iattr *iattr)
+{
+	struct inode *inode = dentry->d_inode;
+	struct proc_dir_entry *de = PDE(inode);
+	int error;
+
+	error = inode_change_ok(inode, iattr);
+	if (error)
+		goto out;
+
+	error = inode_setattr(inode, iattr);
+	if (error)
+		goto out;
+	
+	de->uid = inode->i_uid;
+	de->gid = inode->i_gid;
+	de->mode = inode->i_mode;
+out:
+	return error;
+}
+
+static struct inode_operations proc_file_inode_operations = {
+	.setattr	= proc_notify_change,
+};
+
+/*
+ * This function parses a name such as "tty/driver/serial", and
+ * returns the struct proc_dir_entry for "/proc/tty/driver", and
+ * returns "serial" in residual.
+ */
+static int xlate_proc_name(const char *name,
+			   struct proc_dir_entry **ret, const char **residual)
+{
+	const char     		*cp = name, *next;
+	struct proc_dir_entry	*de;
+	int			len;
+
+	de = &proc_root;
+	while (1) {
+		next = strchr(cp, '/');
+		if (!next)
+			break;
+
+		len = next - cp;
+		for (de = de->subdir; de ; de = de->next) {
+			if (proc_match(len, cp, de))
+				break;
+		}
+		if (!de)
+			return -ENOENT;
+		cp += len + 1;
+	}
+	*residual = cp;
+	*ret = de;
+	return 0;
+}
+
+static DEFINE_IDR(proc_inum_idr);
+static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */
+
+#define PROC_DYNAMIC_FIRST 0xF0000000UL
+
+/*
+ * Return an inode number between PROC_DYNAMIC_FIRST and
+ * 0xffffffff, or zero on failure.
+ */
+static unsigned int get_inode_number(void)
+{
+	int i, inum = 0;
+	int error;
+
+retry:
+	if (idr_pre_get(&proc_inum_idr, GFP_KERNEL) == 0)
+		return 0;
+
+	spin_lock(&proc_inum_lock);
+	error = idr_get_new(&proc_inum_idr, NULL, &i);
+	spin_unlock(&proc_inum_lock);
+	if (error == -EAGAIN)
+		goto retry;
+	else if (error)
+		return 0;
+
+	inum = (i & MAX_ID_MASK) + PROC_DYNAMIC_FIRST;
+
+	/* inum will never be more than 0xf0ffffff, so no check
+	 * for overflow.
+	 */
+
+	return inum;
+}
+
+static void release_inode_number(unsigned int inum)
+{
+	int id = (inum - PROC_DYNAMIC_FIRST) | ~MAX_ID_MASK;
+
+	spin_lock(&proc_inum_lock);
+	idr_remove(&proc_inum_idr, id);
+	spin_unlock(&proc_inum_lock);
+}
+
+static int proc_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+	nd_set_link(nd, PDE(dentry->d_inode)->data);
+	return 0;
+}
+
+static struct inode_operations proc_link_inode_operations = {
+	.readlink	= generic_readlink,
+	.follow_link	= proc_follow_link,
+};
+
+/*
+ * As some entries in /proc are volatile, we want to 
+ * get rid of unused dentries.  This could be made 
+ * smarter: we could keep a "volatile" flag in the 
+ * inode to indicate which ones to keep.
+ */
+static int proc_delete_dentry(struct dentry * dentry)
+{
+	return 1;
+}
+
+static struct dentry_operations proc_dentry_operations =
+{
+	.d_delete	= proc_delete_dentry,
+};
+
+/*
+ * Don't create negative dentries here, return -ENOENT by hand
+ * instead.
+ */
+struct dentry *proc_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+{
+	struct inode *inode = NULL;
+	struct proc_dir_entry * de;
+	int error = -ENOENT;
+
+	lock_kernel();
+	de = PDE(dir);
+	if (de) {
+		for (de = de->subdir; de ; de = de->next) {
+			if (de->namelen != dentry->d_name.len)
+				continue;
+			if (!memcmp(dentry->d_name.name, de->name, de->namelen)) {
+				unsigned int ino = de->low_ino;
+
+				error = -EINVAL;
+				inode = proc_get_inode(dir->i_sb, ino, de);
+				break;
+			}
+		}
+	}
+	unlock_kernel();
+
+	if (inode) {
+		dentry->d_op = &proc_dentry_operations;
+		d_add(dentry, inode);
+		return NULL;
+	}
+	return ERR_PTR(error);
+}
+
+/*
+ * This returns non-zero if at EOF, so that the /proc
+ * root directory can use this and check if it should
+ * continue with the <pid> entries..
+ *
+ * Note that the VFS-layer doesn't care about the return
+ * value of the readdir() call, as long as it's non-negative
+ * for success..
+ */
+int proc_readdir(struct file * filp,
+	void * dirent, filldir_t filldir)
+{
+	struct proc_dir_entry * de;
+	unsigned int ino;
+	int i;
+	struct inode *inode = filp->f_dentry->d_inode;
+	int ret = 0;
+
+	lock_kernel();
+
+	ino = inode->i_ino;
+	de = PDE(inode);
+	if (!de) {
+		ret = -EINVAL;
+		goto out;
+	}
+	i = filp->f_pos;
+	switch (i) {
+		case 0:
+			if (filldir(dirent, ".", 1, i, ino, DT_DIR) < 0)
+				goto out;
+			i++;
+			filp->f_pos++;
+			/* fall through */
+		case 1:
+			if (filldir(dirent, "..", 2, i,
+				    parent_ino(filp->f_dentry),
+				    DT_DIR) < 0)
+				goto out;
+			i++;
+			filp->f_pos++;
+			/* fall through */
+		default:
+			de = de->subdir;
+			i -= 2;
+			for (;;) {
+				if (!de) {
+					ret = 1;
+					goto out;
+				}
+				if (!i)
+					break;
+				de = de->next;
+				i--;
+			}
+
+			do {
+				if (filldir(dirent, de->name, de->namelen, filp->f_pos,
+					    de->low_ino, de->mode >> 12) < 0)
+					goto out;
+				filp->f_pos++;
+				de = de->next;
+			} while (de);
+	}
+	ret = 1;
+out:	unlock_kernel();
+	return ret;	
+}
+
+/*
+ * These are the generic /proc directory operations. They
+ * use the in-memory "struct proc_dir_entry" tree to parse
+ * the /proc directory.
+ */
+static struct file_operations proc_dir_operations = {
+	.read			= generic_read_dir,
+	.readdir		= proc_readdir,
+};
+
+/*
+ * proc directories can do almost nothing..
+ */
+static struct inode_operations proc_dir_inode_operations = {
+	.lookup		= proc_lookup,
+	.setattr	= proc_notify_change,
+};
+
+static int proc_register(struct proc_dir_entry * dir, struct proc_dir_entry * dp)
+{
+	unsigned int i;
+	
+	i = get_inode_number();
+	if (i == 0)
+		return -EAGAIN;
+	dp->low_ino = i;
+	dp->next = dir->subdir;
+	dp->parent = dir;
+	dir->subdir = dp;
+	if (S_ISDIR(dp->mode)) {
+		if (dp->proc_iops == NULL) {
+			dp->proc_fops = &proc_dir_operations;
+			dp->proc_iops = &proc_dir_inode_operations;
+		}
+		dir->nlink++;
+	} else if (S_ISLNK(dp->mode)) {
+		if (dp->proc_iops == NULL)
+			dp->proc_iops = &proc_link_inode_operations;
+	} else if (S_ISREG(dp->mode)) {
+		if (dp->proc_fops == NULL)
+			dp->proc_fops = &proc_file_operations;
+		if (dp->proc_iops == NULL)
+			dp->proc_iops = &proc_file_inode_operations;
+	}
+	return 0;
+}
+
+/*
+ * Kill an inode that got unregistered..
+ */
+static void proc_kill_inodes(struct proc_dir_entry *de)
+{
+	struct list_head *p;
+	struct super_block *sb = proc_mnt->mnt_sb;
+
+	/*
+	 * Actually it's a partial revoke().
+	 */
+	file_list_lock();
+	list_for_each(p, &sb->s_files) {
+		struct file * filp = list_entry(p, struct file, f_list);
+		struct dentry * dentry = filp->f_dentry;
+		struct inode * inode;
+		struct file_operations *fops;
+
+		if (dentry->d_op != &proc_dentry_operations)
+			continue;
+		inode = dentry->d_inode;
+		if (PDE(inode) != de)
+			continue;
+		fops = filp->f_op;
+		filp->f_op = NULL;
+		fops_put(fops);
+	}
+	file_list_unlock();
+}
+
+static struct proc_dir_entry *proc_create(struct proc_dir_entry **parent,
+					  const char *name,
+					  mode_t mode,
+					  nlink_t nlink)
+{
+	struct proc_dir_entry *ent = NULL;
+	const char *fn = name;
+	int len;
+
+	/* make sure name is valid */
+	if (!name || !strlen(name)) goto out;
+
+	if (!(*parent) && xlate_proc_name(name, parent, &fn) != 0)
+		goto out;
+
+	/* At this point there must not be any '/' characters beyond *fn */
+	if (strchr(fn, '/'))
+		goto out;
+
+	len = strlen(fn);
+
+	ent = kmalloc(sizeof(struct proc_dir_entry) + len + 1, GFP_KERNEL);
+	if (!ent) goto out;
+
+	memset(ent, 0, sizeof(struct proc_dir_entry));
+	memcpy(((char *) ent) + sizeof(struct proc_dir_entry), fn, len + 1);
+	ent->name = ((char *) ent) + sizeof(*ent);
+	ent->namelen = len;
+	ent->mode = mode;
+	ent->nlink = nlink;
+ out:
+	return ent;
+}
+
+struct proc_dir_entry *proc_symlink(const char *name,
+		struct proc_dir_entry *parent, const char *dest)
+{
+	struct proc_dir_entry *ent;
+
+	ent = proc_create(&parent,name,
+			  (S_IFLNK | S_IRUGO | S_IWUGO | S_IXUGO),1);
+
+	if (ent) {
+		ent->data = kmalloc((ent->size=strlen(dest))+1, GFP_KERNEL);
+		if (ent->data) {
+			strcpy((char*)ent->data,dest);
+			if (proc_register(parent, ent) < 0) {
+				kfree(ent->data);
+				kfree(ent);
+				ent = NULL;
+			}
+		} else {
+			kfree(ent);
+			ent = NULL;
+		}
+	}
+	return ent;
+}
+
+struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
+		struct proc_dir_entry *parent)
+{
+	struct proc_dir_entry *ent;
+
+	ent = proc_create(&parent, name, S_IFDIR | mode, 2);
+	if (ent) {
+		ent->proc_fops = &proc_dir_operations;
+		ent->proc_iops = &proc_dir_inode_operations;
+
+		if (proc_register(parent, ent) < 0) {
+			kfree(ent);
+			ent = NULL;
+		}
+	}
+	return ent;
+}
+
+struct proc_dir_entry *proc_mkdir(const char *name,
+		struct proc_dir_entry *parent)
+{
+	return proc_mkdir_mode(name, S_IRUGO | S_IXUGO, parent);
+}
+
+struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
+					 struct proc_dir_entry *parent)
+{
+	struct proc_dir_entry *ent;
+	nlink_t nlink;
+
+	if (S_ISDIR(mode)) {
+		if ((mode & S_IALLUGO) == 0)
+			mode |= S_IRUGO | S_IXUGO;
+		nlink = 2;
+	} else {
+		if ((mode & S_IFMT) == 0)
+			mode |= S_IFREG;
+		if ((mode & S_IALLUGO) == 0)
+			mode |= S_IRUGO;
+		nlink = 1;
+	}
+
+	ent = proc_create(&parent,name,mode,nlink);
+	if (ent) {
+		if (S_ISDIR(mode)) {
+			ent->proc_fops = &proc_dir_operations;
+			ent->proc_iops = &proc_dir_inode_operations;
+		}
+		if (proc_register(parent, ent) < 0) {
+			kfree(ent);
+			ent = NULL;
+		}
+	}
+	return ent;
+}
+
+void free_proc_entry(struct proc_dir_entry *de)
+{
+	unsigned int ino = de->low_ino;
+
+	if (ino < PROC_DYNAMIC_FIRST)
+		return;
+
+	release_inode_number(ino);
+
+	if (S_ISLNK(de->mode) && de->data)
+		kfree(de->data);
+	kfree(de);
+}
+
+/*
+ * Remove a /proc entry and free it if it's not currently in use.
+ * If it is in use, we set the 'deleted' flag.
+ */
+void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
+{
+	struct proc_dir_entry **p;
+	struct proc_dir_entry *de;
+	const char *fn = name;
+	int len;
+
+	if (!parent && xlate_proc_name(name, &parent, &fn) != 0)
+		goto out;
+	len = strlen(fn);
+	for (p = &parent->subdir; *p; p=&(*p)->next ) {
+		if (!proc_match(len, fn, *p))
+			continue;
+		de = *p;
+		*p = de->next;
+		de->next = NULL;
+		if (S_ISDIR(de->mode))
+			parent->nlink--;
+		proc_kill_inodes(de);
+		de->nlink = 0;
+		WARN_ON(de->subdir);
+		if (!atomic_read(&de->count))
+			free_proc_entry(de);
+		else {
+			de->deleted = 1;
+			printk("remove_proc_entry: %s/%s busy, count=%d\n",
+				parent->name, de->name, atomic_read(&de->count));
+		}
+		break;
+	}
+out:
+	return;
+}
diff --git a/fs/proc/inode-alloc.txt b/fs/proc/inode-alloc.txt
new file mode 100644
index 0000000..77212f9
--- /dev/null
+++ b/fs/proc/inode-alloc.txt
@@ -0,0 +1,14 @@
+Current inode allocations in the proc-fs (hex-numbers):
+
+  00000000		reserved
+  00000001-00000fff	static entries	(goners)
+       001		root-ino
+
+  00001000-00001fff	unused
+  0001xxxx-7fffxxxx	pid-dir entries for pid 1-7fff
+  80000000-efffffff	unused
+  f0000000-ffffffff	dynamic entries
+
+Goal:
+	a) once we'll split the thing into several virtual filesystems we
+	will get rid of magical ranges (and this file, BTW).
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
new file mode 100644
index 0000000..133c286
--- /dev/null
+++ b/fs/proc/inode.c
@@ -0,0 +1,218 @@
+/*
+ *  linux/fs/proc/inode.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ */
+
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/stat.h>
+#include <linux/file.h>
+#include <linux/limits.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/smp_lock.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+extern void free_proc_entry(struct proc_dir_entry *);
+
+static inline struct proc_dir_entry * de_get(struct proc_dir_entry *de)
+{
+	if (de)
+		atomic_inc(&de->count);
+	return de;
+}
+
+/*
+ * Decrements the use count and checks for deferred deletion.
+ */
+static void de_put(struct proc_dir_entry *de)
+{
+	if (de) {	
+		lock_kernel();		
+		if (!atomic_read(&de->count)) {
+			printk("de_put: entry %s already free!\n", de->name);
+			unlock_kernel();
+			return;
+		}
+
+		if (atomic_dec_and_test(&de->count)) {
+			if (de->deleted) {
+				printk("de_put: deferred delete of %s\n",
+					de->name);
+				free_proc_entry(de);
+			}
+		}		
+		unlock_kernel();
+	}
+}
+
+/*
+ * Decrement the use count of the proc_dir_entry.
+ */
+static void proc_delete_inode(struct inode *inode)
+{
+	struct proc_dir_entry *de;
+	struct task_struct *tsk;
+
+	/* Let go of any associated process */
+	tsk = PROC_I(inode)->task;
+	if (tsk)
+		put_task_struct(tsk);
+
+	/* Let go of any associated proc directory entry */
+	de = PROC_I(inode)->pde;
+	if (de) {
+		if (de->owner)
+			module_put(de->owner);
+		de_put(de);
+	}
+	clear_inode(inode);
+}
+
+struct vfsmount *proc_mnt;
+
+static void proc_read_inode(struct inode * inode)
+{
+	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+}
+
+static kmem_cache_t * proc_inode_cachep;
+
+static struct inode *proc_alloc_inode(struct super_block *sb)
+{
+	struct proc_inode *ei;
+	struct inode *inode;
+
+	ei = (struct proc_inode *)kmem_cache_alloc(proc_inode_cachep, SLAB_KERNEL);
+	if (!ei)
+		return NULL;
+	ei->task = NULL;
+	ei->type = 0;
+	ei->op.proc_get_link = NULL;
+	ei->pde = NULL;
+	inode = &ei->vfs_inode;
+	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+	return inode;
+}
+
+static void proc_destroy_inode(struct inode *inode)
+{
+	kmem_cache_free(proc_inode_cachep, PROC_I(inode));
+}
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+	struct proc_inode *ei = (struct proc_inode *) foo;
+
+	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+	    SLAB_CTOR_CONSTRUCTOR)
+		inode_init_once(&ei->vfs_inode);
+}
+ 
+int __init proc_init_inodecache(void)
+{
+	proc_inode_cachep = kmem_cache_create("proc_inode_cache",
+					     sizeof(struct proc_inode),
+					     0, SLAB_RECLAIM_ACCOUNT,
+					     init_once, NULL);
+	if (proc_inode_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+static int proc_remount(struct super_block *sb, int *flags, char *data)
+{
+	*flags |= MS_NODIRATIME;
+	return 0;
+}
+
+static struct super_operations proc_sops = { 
+	.alloc_inode	= proc_alloc_inode,
+	.destroy_inode	= proc_destroy_inode,
+	.read_inode	= proc_read_inode,
+	.drop_inode	= generic_delete_inode,
+	.delete_inode	= proc_delete_inode,
+	.statfs		= simple_statfs,
+	.remount_fs	= proc_remount,
+};
+
+struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
+				struct proc_dir_entry *de)
+{
+	struct inode * inode;
+
+	/*
+	 * Increment the use count so the dir entry can't disappear.
+	 */
+	de_get(de);
+
+	WARN_ON(de && de->deleted);
+
+	inode = iget(sb, ino);
+	if (!inode)
+		goto out_fail;
+	
+	PROC_I(inode)->pde = de;
+	if (de) {
+		if (de->mode) {
+			inode->i_mode = de->mode;
+			inode->i_uid = de->uid;
+			inode->i_gid = de->gid;
+		}
+		if (de->size)
+			inode->i_size = de->size;
+		if (de->nlink)
+			inode->i_nlink = de->nlink;
+		if (!try_module_get(de->owner))
+			goto out_fail;
+		if (de->proc_iops)
+			inode->i_op = de->proc_iops;
+		if (de->proc_fops)
+			inode->i_fop = de->proc_fops;
+	}
+
+out:
+	return inode;
+
+out_fail:
+	de_put(de);
+	goto out;
+}			
+
+int proc_fill_super(struct super_block *s, void *data, int silent)
+{
+	struct inode * root_inode;
+
+	s->s_flags |= MS_NODIRATIME;
+	s->s_blocksize = 1024;
+	s->s_blocksize_bits = 10;
+	s->s_magic = PROC_SUPER_MAGIC;
+	s->s_op = &proc_sops;
+	s->s_time_gran = 1;
+	
+	root_inode = proc_get_inode(s, PROC_ROOT_INO, &proc_root);
+	if (!root_inode)
+		goto out_no_root;
+	/*
+	 * Fixup the root inode's nlink value
+	 */
+	root_inode->i_nlink += nr_processes();
+	root_inode->i_uid = 0;
+	root_inode->i_gid = 0;
+	s->s_root = d_alloc_root(root_inode);
+	if (!s->s_root)
+		goto out_no_root;
+	return 0;
+
+out_no_root:
+	printk("proc_read_super: get root inode failed\n");
+	iput(root_inode);
+	return -ENOMEM;
+}
+MODULE_LICENSE("GPL");
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
new file mode 100644
index 0000000..3e55198
--- /dev/null
+++ b/fs/proc/internal.h
@@ -0,0 +1,48 @@
+/* internal.h: internal procfs definitions
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/proc_fs.h>
+
+struct vmalloc_info {
+	unsigned long	used;
+	unsigned long	largest_chunk;
+};
+
+#ifdef CONFIG_MMU
+#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
+extern void get_vmalloc_info(struct vmalloc_info *vmi);
+#else
+
+#define VMALLOC_TOTAL 0UL
+#define get_vmalloc_info(vmi)			\
+do {						\
+	(vmi)->used = 0;			\
+	(vmi)->largest_chunk = 0;		\
+} while(0)
+
+#endif
+
+extern void create_seq_entry(char *name, mode_t mode, struct file_operations *f);
+extern int proc_exe_link(struct inode *, struct dentry **, struct vfsmount **);
+extern int proc_tid_stat(struct task_struct *,  char *);
+extern int proc_tgid_stat(struct task_struct *, char *);
+extern int proc_pid_status(struct task_struct *, char *);
+extern int proc_pid_statm(struct task_struct *, char *);
+
+static inline struct task_struct *proc_task(struct inode *inode)
+{
+	return PROC_I(inode)->task;
+}
+
+static inline int proc_type(struct inode *inode)
+{
+	return PROC_I(inode)->type;
+}
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
new file mode 100644
index 0000000..1c7da98
--- /dev/null
+++ b/fs/proc/kcore.c
@@ -0,0 +1,404 @@
+/*
+ *	fs/proc/kcore.c kernel ELF core dumper
+ *
+ *	Modelled on fs/exec.c:aout_core_dump()
+ *	Jeremy Fitzhardinge <jeremy@sw.oz.au>
+ *	ELF version written by David Howells <David.Howells@nexor.co.uk>
+ *	Modified and incorporated into 2.3.x by Tigran Aivazian <tigran@veritas.com>
+ *	Support to dump vmalloc'd areas (ELF only), Tigran Aivazian <tigran@veritas.com>
+ *	Safe accesses to vmalloc/direct-mapped discontiguous areas, Kanoj Sarcar <kanoj@sgi.com>
+ */
+
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <linux/proc_fs.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/elf.h>
+#include <linux/elfcore.h>
+#include <linux/vmalloc.h>
+#include <linux/highmem.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+
+static int open_kcore(struct inode * inode, struct file * filp)
+{
+	return capable(CAP_SYS_RAWIO) ? 0 : -EPERM;
+}
+
+static ssize_t read_kcore(struct file *, char __user *, size_t, loff_t *);
+
+struct file_operations proc_kcore_operations = {
+	.read		= read_kcore,
+	.open		= open_kcore,
+};
+
+#ifndef kc_vaddr_to_offset
+#define	kc_vaddr_to_offset(v) ((v) - PAGE_OFFSET)
+#endif
+#ifndef	kc_offset_to_vaddr
+#define	kc_offset_to_vaddr(o) ((o) + PAGE_OFFSET)
+#endif
+
+#define roundup(x, y)  ((((x)+((y)-1))/(y))*(y))
+
+/* An ELF note in memory */
+struct memelfnote
+{
+	const char *name;
+	int type;
+	unsigned int datasz;
+	void *data;
+};
+
+static struct kcore_list *kclist;
+static DEFINE_RWLOCK(kclist_lock);
+
+void
+kclist_add(struct kcore_list *new, void *addr, size_t size)
+{
+	new->addr = (unsigned long)addr;
+	new->size = size;
+
+	write_lock(&kclist_lock);
+	new->next = kclist;
+	kclist = new;
+	write_unlock(&kclist_lock);
+}
+
+static size_t get_kcore_size(int *nphdr, size_t *elf_buflen)
+{
+	size_t try, size;
+	struct kcore_list *m;
+
+	*nphdr = 1; /* PT_NOTE */
+	size = 0;
+
+	for (m=kclist; m; m=m->next) {
+		try = kc_vaddr_to_offset((size_t)m->addr + m->size);
+		if (try > size)
+			size = try;
+		*nphdr = *nphdr + 1;
+	}
+	*elf_buflen =	sizeof(struct elfhdr) + 
+			(*nphdr + 2)*sizeof(struct elf_phdr) + 
+			3 * (sizeof(struct elf_note) + 4) +
+			sizeof(struct elf_prstatus) +
+			sizeof(struct elf_prpsinfo) +
+			sizeof(struct task_struct);
+	*elf_buflen = PAGE_ALIGN(*elf_buflen);
+	return size + *elf_buflen;
+}
+
+
+/*****************************************************************************/
+/*
+ * determine size of ELF note
+ */
+static int notesize(struct memelfnote *en)
+{
+	int sz;
+
+	sz = sizeof(struct elf_note);
+	sz += roundup(strlen(en->name), 4);
+	sz += roundup(en->datasz, 4);
+
+	return sz;
+} /* end notesize() */
+
+/*****************************************************************************/
+/*
+ * store a note in the header buffer
+ */
+static char *storenote(struct memelfnote *men, char *bufp)
+{
+	struct elf_note en;
+
+#define DUMP_WRITE(addr,nr) do { memcpy(bufp,addr,nr); bufp += nr; } while(0)
+
+	en.n_namesz = strlen(men->name);
+	en.n_descsz = men->datasz;
+	en.n_type = men->type;
+
+	DUMP_WRITE(&en, sizeof(en));
+	DUMP_WRITE(men->name, en.n_namesz);
+
+	/* XXX - cast from long long to long to avoid need for libgcc.a */
+	bufp = (char*) roundup((unsigned long)bufp,4);
+	DUMP_WRITE(men->data, men->datasz);
+	bufp = (char*) roundup((unsigned long)bufp,4);
+
+#undef DUMP_WRITE
+
+	return bufp;
+} /* end storenote() */
+
+/*
+ * store an ELF coredump header in the supplied buffer
+ * nphdr is the number of elf_phdr to insert
+ */
+static void elf_kcore_store_hdr(char *bufp, int nphdr, int dataoff)
+{
+	struct elf_prstatus prstatus;	/* NT_PRSTATUS */
+	struct elf_prpsinfo prpsinfo;	/* NT_PRPSINFO */
+	struct elf_phdr *nhdr, *phdr;
+	struct elfhdr *elf;
+	struct memelfnote notes[3];
+	off_t offset = 0;
+	struct kcore_list *m;
+
+	/* setup ELF header */
+	elf = (struct elfhdr *) bufp;
+	bufp += sizeof(struct elfhdr);
+	offset += sizeof(struct elfhdr);
+	memcpy(elf->e_ident, ELFMAG, SELFMAG);
+	elf->e_ident[EI_CLASS]	= ELF_CLASS;
+	elf->e_ident[EI_DATA]	= ELF_DATA;
+	elf->e_ident[EI_VERSION]= EV_CURRENT;
+	elf->e_ident[EI_OSABI] = ELF_OSABI;
+	memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
+	elf->e_type	= ET_CORE;
+	elf->e_machine	= ELF_ARCH;
+	elf->e_version	= EV_CURRENT;
+	elf->e_entry	= 0;
+	elf->e_phoff	= sizeof(struct elfhdr);
+	elf->e_shoff	= 0;
+#if defined(CONFIG_H8300)
+	elf->e_flags	= ELF_FLAGS;
+#else
+	elf->e_flags	= 0;
+#endif
+	elf->e_ehsize	= sizeof(struct elfhdr);
+	elf->e_phentsize= sizeof(struct elf_phdr);
+	elf->e_phnum	= nphdr;
+	elf->e_shentsize= 0;
+	elf->e_shnum	= 0;
+	elf->e_shstrndx	= 0;
+
+	/* setup ELF PT_NOTE program header */
+	nhdr = (struct elf_phdr *) bufp;
+	bufp += sizeof(struct elf_phdr);
+	offset += sizeof(struct elf_phdr);
+	nhdr->p_type	= PT_NOTE;
+	nhdr->p_offset	= 0;
+	nhdr->p_vaddr	= 0;
+	nhdr->p_paddr	= 0;
+	nhdr->p_filesz	= 0;
+	nhdr->p_memsz	= 0;
+	nhdr->p_flags	= 0;
+	nhdr->p_align	= 0;
+
+	/* setup ELF PT_LOAD program header for every area */
+	for (m=kclist; m; m=m->next) {
+		phdr = (struct elf_phdr *) bufp;
+		bufp += sizeof(struct elf_phdr);
+		offset += sizeof(struct elf_phdr);
+
+		phdr->p_type	= PT_LOAD;
+		phdr->p_flags	= PF_R|PF_W|PF_X;
+		phdr->p_offset	= kc_vaddr_to_offset(m->addr) + dataoff;
+		phdr->p_vaddr	= (size_t)m->addr;
+		phdr->p_paddr	= 0;
+		phdr->p_filesz	= phdr->p_memsz	= m->size;
+		phdr->p_align	= PAGE_SIZE;
+	}
+
+	/*
+	 * Set up the notes in similar form to SVR4 core dumps made
+	 * with info from their /proc.
+	 */
+	nhdr->p_offset	= offset;
+
+	/* set up the process status */
+	notes[0].name = "CORE";
+	notes[0].type = NT_PRSTATUS;
+	notes[0].datasz = sizeof(struct elf_prstatus);
+	notes[0].data = &prstatus;
+
+	memset(&prstatus, 0, sizeof(struct elf_prstatus));
+
+	nhdr->p_filesz	= notesize(&notes[0]);
+	bufp = storenote(&notes[0], bufp);
+
+	/* set up the process info */
+	notes[1].name	= "CORE";
+	notes[1].type	= NT_PRPSINFO;
+	notes[1].datasz	= sizeof(struct elf_prpsinfo);
+	notes[1].data	= &prpsinfo;
+
+	memset(&prpsinfo, 0, sizeof(struct elf_prpsinfo));
+	prpsinfo.pr_state	= 0;
+	prpsinfo.pr_sname	= 'R';
+	prpsinfo.pr_zomb	= 0;
+
+	strcpy(prpsinfo.pr_fname, "vmlinux");
+	strncpy(prpsinfo.pr_psargs, saved_command_line, ELF_PRARGSZ);
+
+	nhdr->p_filesz	+= notesize(&notes[1]);
+	bufp = storenote(&notes[1], bufp);
+
+	/* set up the task structure */
+	notes[2].name	= "CORE";
+	notes[2].type	= NT_TASKSTRUCT;
+	notes[2].datasz	= sizeof(struct task_struct);
+	notes[2].data	= current;
+
+	nhdr->p_filesz	+= notesize(&notes[2]);
+	bufp = storenote(&notes[2], bufp);
+
+} /* end elf_kcore_store_hdr() */
+
+/*****************************************************************************/
+/*
+ * read from the ELF header and then kernel memory
+ */
+static ssize_t
+read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
+{
+	ssize_t acc = 0;
+	size_t size, tsz;
+	size_t elf_buflen;
+	int nphdr;
+	unsigned long start;
+
+	read_lock(&kclist_lock);
+	proc_root_kcore->size = size = get_kcore_size(&nphdr, &elf_buflen);
+	if (buflen == 0 || *fpos >= size) {
+		read_unlock(&kclist_lock);
+		return 0;
+	}
+
+	/* trim buflen to not go beyond EOF */
+	if (buflen > size - *fpos)
+		buflen = size - *fpos;
+
+	/* construct an ELF core header if we'll need some of it */
+	if (*fpos < elf_buflen) {
+		char * elf_buf;
+
+		tsz = elf_buflen - *fpos;
+		if (buflen < tsz)
+			tsz = buflen;
+		elf_buf = kmalloc(elf_buflen, GFP_ATOMIC);
+		if (!elf_buf) {
+			read_unlock(&kclist_lock);
+			return -ENOMEM;
+		}
+		memset(elf_buf, 0, elf_buflen);
+		elf_kcore_store_hdr(elf_buf, nphdr, elf_buflen);
+		read_unlock(&kclist_lock);
+		if (copy_to_user(buffer, elf_buf + *fpos, tsz)) {
+			kfree(elf_buf);
+			return -EFAULT;
+		}
+		kfree(elf_buf);
+		buflen -= tsz;
+		*fpos += tsz;
+		buffer += tsz;
+		acc += tsz;
+
+		/* leave now if filled buffer already */
+		if (buflen == 0)
+			return acc;
+	} else
+		read_unlock(&kclist_lock);
+
+	/*
+	 * Check to see if our file offset matches with any of
+	 * the addresses in the elf_phdr on our list.
+	 */
+	start = kc_offset_to_vaddr(*fpos - elf_buflen);
+	if ((tsz = (PAGE_SIZE - (start & ~PAGE_MASK))) > buflen)
+		tsz = buflen;
+		
+	while (buflen) {
+		struct kcore_list *m;
+
+		read_lock(&kclist_lock);
+		for (m=kclist; m; m=m->next) {
+			if (start >= m->addr && start < (m->addr+m->size))
+				break;
+		}
+		read_unlock(&kclist_lock);
+
+		if (m == NULL) {
+			if (clear_user(buffer, tsz))
+				return -EFAULT;
+		} else if ((start >= VMALLOC_START) && (start < VMALLOC_END)) {
+			char * elf_buf;
+			struct vm_struct *m;
+			unsigned long curstart = start;
+			unsigned long cursize = tsz;
+
+			elf_buf = kmalloc(tsz, GFP_KERNEL);
+			if (!elf_buf)
+				return -ENOMEM;
+			memset(elf_buf, 0, tsz);
+
+			read_lock(&vmlist_lock);
+			for (m=vmlist; m && cursize; m=m->next) {
+				unsigned long vmstart;
+				unsigned long vmsize;
+				unsigned long msize = m->size - PAGE_SIZE;
+
+				if (((unsigned long)m->addr + msize) < 
+								curstart)
+					continue;
+				if ((unsigned long)m->addr > (curstart + 
+								cursize))
+					break;
+				vmstart = (curstart < (unsigned long)m->addr ? 
+					(unsigned long)m->addr : curstart);
+				if (((unsigned long)m->addr + msize) > 
+							(curstart + cursize))
+					vmsize = curstart + cursize - vmstart;
+				else
+					vmsize = (unsigned long)m->addr + 
+							msize - vmstart;
+				curstart = vmstart + vmsize;
+				cursize -= vmsize;
+				/* don't dump ioremap'd stuff! (TA) */
+				if (m->flags & VM_IOREMAP)
+					continue;
+				memcpy(elf_buf + (vmstart - start),
+					(char *)vmstart, vmsize);
+			}
+			read_unlock(&vmlist_lock);
+			if (copy_to_user(buffer, elf_buf, tsz)) {
+				kfree(elf_buf);
+				return -EFAULT;
+			}
+			kfree(elf_buf);
+		} else {
+			if (kern_addr_valid(start)) {
+				unsigned long n;
+
+				n = copy_to_user(buffer, (char *)start, tsz);
+				/*
+				 * We cannot distingush between fault on source
+				 * and fault on destination. When this happens
+				 * we clear too and hope it will trigger the
+				 * EFAULT again.
+				 */
+				if (n) { 
+					if (clear_user(buffer + tsz - n,
+								tsz - n))
+						return -EFAULT;
+				}
+			} else {
+				if (clear_user(buffer, tsz))
+					return -EFAULT;
+			}
+		}
+		buflen -= tsz;
+		*fpos += tsz;
+		buffer += tsz;
+		acc += tsz;
+		start += tsz;
+		tsz = (buflen > PAGE_SIZE ? PAGE_SIZE : buflen);
+	}
+
+	return acc;
+}
diff --git a/fs/proc/kmsg.c b/fs/proc/kmsg.c
new file mode 100644
index 0000000..10d37bf
--- /dev/null
+++ b/fs/proc/kmsg.c
@@ -0,0 +1,55 @@
+/*
+ *  linux/fs/proc/kmsg.c
+ *
+ *  Copyright (C) 1992  by Linus Torvalds
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/poll.h>
+#include <linux/fs.h>
+
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+extern wait_queue_head_t log_wait;
+
+extern int do_syslog(int type, char __user *bug, int count);
+
+static int kmsg_open(struct inode * inode, struct file * file)
+{
+	return do_syslog(1,NULL,0);
+}
+
+static int kmsg_release(struct inode * inode, struct file * file)
+{
+	(void) do_syslog(0,NULL,0);
+	return 0;
+}
+
+static ssize_t kmsg_read(struct file *file, char __user *buf,
+			 size_t count, loff_t *ppos)
+{
+	if ((file->f_flags & O_NONBLOCK) && !do_syslog(9, NULL, 0))
+		return -EAGAIN;
+	return do_syslog(2, buf, count);
+}
+
+static unsigned int kmsg_poll(struct file *file, poll_table *wait)
+{
+	poll_wait(file, &log_wait, wait);
+	if (do_syslog(9, NULL, 0))
+		return POLLIN | POLLRDNORM;
+	return 0;
+}
+
+
+struct file_operations proc_kmsg_operations = {
+	.read		= kmsg_read,
+	.poll		= kmsg_poll,
+	.open		= kmsg_open,
+	.release	= kmsg_release,
+};
diff --git a/fs/proc/mmu.c b/fs/proc/mmu.c
new file mode 100644
index 0000000..a704103
--- /dev/null
+++ b/fs/proc/mmu.c
@@ -0,0 +1,67 @@
+/* mmu.c: mmu memory info files
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mman.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/seq_file.h>
+#include <linux/hugetlb.h>
+#include <linux/vmalloc.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/tlb.h>
+#include <asm/div64.h>
+#include "internal.h"
+
+void get_vmalloc_info(struct vmalloc_info *vmi)
+{
+	struct vm_struct *vma;
+	unsigned long free_area_size;
+	unsigned long prev_end;
+
+	vmi->used = 0;
+
+	if (!vmlist) {
+		vmi->largest_chunk = VMALLOC_TOTAL;
+	}
+	else {
+		vmi->largest_chunk = 0;
+
+		prev_end = VMALLOC_START;
+
+		read_lock(&vmlist_lock);
+
+		for (vma = vmlist; vma; vma = vma->next) {
+			vmi->used += vma->size;
+
+			free_area_size = (unsigned long) vma->addr - prev_end;
+			if (vmi->largest_chunk < free_area_size)
+				vmi->largest_chunk = free_area_size;
+
+			prev_end = vma->size + (unsigned long) vma->addr;
+		}
+
+		if (VMALLOC_END - prev_end > vmi->largest_chunk)
+			vmi->largest_chunk = VMALLOC_END - prev_end;
+
+		read_unlock(&vmlist_lock);
+	}
+}
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
new file mode 100644
index 0000000..f3bf016
--- /dev/null
+++ b/fs/proc/nommu.c
@@ -0,0 +1,135 @@
+/* nommu.c: mmu-less memory info files
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mman.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/seq_file.h>
+#include <linux/hugetlb.h>
+#include <linux/vmalloc.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/tlb.h>
+#include <asm/div64.h>
+#include "internal.h"
+
+/*
+ * display a list of all the VMAs the kernel knows about
+ * - nommu kernals have a single flat list
+ */
+static int nommu_vma_list_show(struct seq_file *m, void *v)
+{
+	struct vm_area_struct *vma;
+	unsigned long ino = 0;
+	struct file *file;
+	dev_t dev = 0;
+	int flags, len;
+
+	vma = rb_entry((struct rb_node *) v, struct vm_area_struct, vm_rb);
+
+	flags = vma->vm_flags;
+	file = vma->vm_file;
+
+	if (file) {
+		struct inode *inode = vma->vm_file->f_dentry->d_inode;
+		dev = inode->i_sb->s_dev;
+		ino = inode->i_ino;
+	}
+
+	seq_printf(m,
+		   "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
+		   vma->vm_start,
+		   vma->vm_end,
+		   flags & VM_READ ? 'r' : '-',
+		   flags & VM_WRITE ? 'w' : '-',
+		   flags & VM_EXEC ? 'x' : '-',
+		   flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p',
+		   vma->vm_pgoff << PAGE_SHIFT,
+		   MAJOR(dev), MINOR(dev), ino, &len);
+
+	if (file) {
+		len = 25 + sizeof(void *) * 6 - len;
+		if (len < 1)
+			len = 1;
+		seq_printf(m, "%*c", len, ' ');
+		seq_path(m, file->f_vfsmnt, file->f_dentry, "");
+	}
+
+	seq_putc(m, '\n');
+	return 0;
+}
+
+static void *nommu_vma_list_start(struct seq_file *m, loff_t *_pos)
+{
+	struct rb_node *_rb;
+	loff_t pos = *_pos;
+	void *next = NULL;
+
+	down_read(&nommu_vma_sem);
+
+	for (_rb = rb_first(&nommu_vma_tree); _rb; _rb = rb_next(_rb)) {
+		if (pos == 0) {
+			next = _rb;
+			break;
+		}
+	}
+
+	return next;
+}
+
+static void nommu_vma_list_stop(struct seq_file *m, void *v)
+{
+	up_read(&nommu_vma_sem);
+}
+
+static void *nommu_vma_list_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	(*pos)++;
+	return rb_next((struct rb_node *) v);
+}
+
+static struct seq_operations proc_nommu_vma_list_seqop = {
+	.start	= nommu_vma_list_start,
+	.next	= nommu_vma_list_next,
+	.stop	= nommu_vma_list_stop,
+	.show	= nommu_vma_list_show
+};
+
+static int proc_nommu_vma_list_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &proc_nommu_vma_list_seqop);
+}
+
+static struct file_operations proc_nommu_vma_list_operations = {
+	.open    = proc_nommu_vma_list_open,
+	.read    = seq_read,
+	.llseek  = seq_lseek,
+	.release = seq_release,
+};
+
+static int __init proc_nommu_init(void)
+{
+	create_seq_entry("maps", S_IRUGO, &proc_nommu_vma_list_operations);
+	return 0;
+}
+
+module_init(proc_nommu_init);
diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
new file mode 100644
index 0000000..67423c6
--- /dev/null
+++ b/fs/proc/proc_devtree.c
@@ -0,0 +1,165 @@
+/*
+ * proc_devtree.c - handles /proc/device-tree
+ *
+ * Copyright 1997 Paul Mackerras
+ */
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <asm/prom.h>
+#include <asm/uaccess.h>
+
+#ifndef HAVE_ARCH_DEVTREE_FIXUPS
+static inline void set_node_proc_entry(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+
+static void inline set_node_name_link(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+
+static void inline set_node_addr_link(struct device_node *np, struct proc_dir_entry *de)
+{
+}
+#endif
+
+static struct proc_dir_entry *proc_device_tree;
+
+/*
+ * Supply data on a read from /proc/device-tree/node/property.
+ */
+static int property_read_proc(char *page, char **start, off_t off,
+			      int count, int *eof, void *data)
+{
+	struct property *pp = data;
+	int n;
+
+	if (off >= pp->length) {
+		*eof = 1;
+		return 0;
+	}
+	n = pp->length - off;
+	if (n > count)
+		n = count;
+	else
+		*eof = 1;
+	memcpy(page, pp->value + off, n);
+	*start = page;
+	return n;
+}
+
+/*
+ * For a node with a name like "gc@10", we make symlinks called "gc"
+ * and "@10" to it.
+ */
+
+/*
+ * Process a node, adding entries for its children and its properties.
+ */
+void proc_device_tree_add_node(struct device_node *np, struct proc_dir_entry *de)
+{
+	struct property *pp;
+	struct proc_dir_entry *ent;
+	struct device_node *child, *sib;
+	const char *p, *at;
+	int l;
+	struct proc_dir_entry *list, **lastp, *al;
+
+	set_node_proc_entry(np, de);
+	lastp = &list;
+	for (pp = np->properties; pp != 0; pp = pp->next) {
+		/*
+		 * Unfortunately proc_register puts each new entry
+		 * at the beginning of the list.  So we rearrange them.
+		 */
+		ent = create_proc_read_entry(pp->name, strncmp(pp->name, "security-", 9) ?
+					     S_IRUGO : S_IRUSR, de, property_read_proc, pp);
+		if (ent == 0)
+			break;
+		if (!strncmp(pp->name, "security-", 9))
+		     ent->size = 0; /* don't leak number of password chars */
+		else
+		     ent->size = pp->length;
+		*lastp = ent;
+		lastp = &ent->next;
+	}
+	child = NULL;
+	while ((child = of_get_next_child(np, child))) {
+		p = strrchr(child->full_name, '/');
+		if (!p)
+			p = child->full_name;
+		else
+			++p;
+		/* chop off '@0' if the name ends with that */
+		l = strlen(p);
+		if (l > 2 && p[l-2] == '@' && p[l-1] == '0')
+			l -= 2;
+		ent = proc_mkdir(p, de);
+		if (ent == 0)
+			break;
+		*lastp = ent;
+		lastp = &ent->next;
+		proc_device_tree_add_node(child, ent);
+
+		/*
+		 * If we left the address part on the name, consider
+		 * adding symlinks from the name and address parts.
+		 */
+		if (p[l] != 0 || (at = strchr(p, '@')) == 0)
+			continue;
+
+		/*
+		 * If this is the first node with a given name property,
+		 * add a symlink with the name property as its name.
+		 */
+		sib = NULL;
+		while ((sib = of_get_next_child(np, sib)) && sib != child)
+			if (sib->name && strcmp(sib->name, child->name) == 0)
+				break;
+		if (sib == child && strncmp(p, child->name, l) != 0) {
+			al = proc_symlink(child->name, de, ent->name);
+			if (al == 0) {
+				of_node_put(sib);
+				break;
+			}
+			set_node_name_link(child, al);
+			*lastp = al;
+			lastp = &al->next;
+		}
+		of_node_put(sib);
+		/*
+		 * Add another directory with the @address part as its name.
+		 */
+		al = proc_symlink(at, de, ent->name);
+		if (al == 0)
+			break;
+		set_node_addr_link(child, al);
+		*lastp = al;
+		lastp = &al->next;
+	}
+	of_node_put(child);
+	*lastp = NULL;
+	de->subdir = list;
+}
+
+/*
+ * Called on initialization to set up the /proc/device-tree subtree
+ */
+void proc_device_tree_init(void)
+{
+	struct device_node *root;
+	if ( !have_of )
+		return;
+	proc_device_tree = proc_mkdir("device-tree", NULL);
+	if (proc_device_tree == 0)
+		return;
+	root = of_find_node_by_path("/");
+	if (root == 0) {
+		printk(KERN_ERR "/proc/device-tree: can't find root\n");
+		return;
+	}
+	proc_device_tree_add_node(root, proc_device_tree);
+	of_node_put(root);
+}
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c
new file mode 100644
index 0000000..1d75d6a
--- /dev/null
+++ b/fs/proc/proc_misc.c
@@ -0,0 +1,615 @@
+/*
+ *  linux/fs/proc/proc_misc.c
+ *
+ *  linux/fs/proc/array.c
+ *  Copyright (C) 1992  by Linus Torvalds
+ *  based on ideas by Darren Senn
+ *
+ *  This used to be the part of array.c. See the rest of history and credits
+ *  there. I took this into a separate file and switched the thing to generic
+ *  proc_file_inode_operations, leaving in array.c only per-process stuff.
+ *  Inumbers allocation made dynamic (via create_proc_entry()).  AV, May 1999.
+ *
+ * Changes:
+ * Fulton Green      :  Encapsulated position metric calculations.
+ *			<kernel@FultonGreen.com>
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/tty.h>
+#include <linux/string.h>
+#include <linux/mman.h>
+#include <linux/proc_fs.h>
+#include <linux/ioport.h>
+#include <linux/config.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/signal.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/smp_lock.h>
+#include <linux/seq_file.h>
+#include <linux/times.h>
+#include <linux/profile.h>
+#include <linux/blkdev.h>
+#include <linux/hugetlb.h>
+#include <linux/jiffies.h>
+#include <linux/sysrq.h>
+#include <linux/vmalloc.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/tlb.h>
+#include <asm/div64.h>
+#include "internal.h"
+
+#define LOAD_INT(x) ((x) >> FSHIFT)
+#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
+/*
+ * Warning: stuff below (imported functions) assumes that its output will fit
+ * into one page. For some of those functions it may be wrong. Moreover, we
+ * have a way to deal with that gracefully. Right now I used straightforward
+ * wrappers, but this needs further analysis wrt potential overflows.
+ */
+extern int get_hardware_list(char *);
+extern int get_stram_list(char *);
+extern int get_chrdev_list(char *);
+extern int get_filesystem_list(char *);
+extern int get_exec_domain_list(char *);
+extern int get_dma_list(char *);
+extern int get_locks_status (char *, char **, off_t, int);
+
+static int proc_calc_metrics(char *page, char **start, off_t off,
+				 int count, int *eof, int len)
+{
+	if (len <= off+count) *eof = 1;
+	*start = page + off;
+	len -= off;
+	if (len>count) len = count;
+	if (len<0) len = 0;
+	return len;
+}
+
+static int loadavg_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	int a, b, c;
+	int len;
+
+	a = avenrun[0] + (FIXED_1/200);
+	b = avenrun[1] + (FIXED_1/200);
+	c = avenrun[2] + (FIXED_1/200);
+	len = sprintf(page,"%d.%02d %d.%02d %d.%02d %ld/%d %d\n",
+		LOAD_INT(a), LOAD_FRAC(a),
+		LOAD_INT(b), LOAD_FRAC(b),
+		LOAD_INT(c), LOAD_FRAC(c),
+		nr_running(), nr_threads, last_pid);
+	return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+static int uptime_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	struct timespec uptime;
+	struct timespec idle;
+	int len;
+	cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
+
+	do_posix_clock_monotonic_gettime(&uptime);
+	cputime_to_timespec(idletime, &idle);
+	len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
+			(unsigned long) uptime.tv_sec,
+			(uptime.tv_nsec / (NSEC_PER_SEC / 100)),
+			(unsigned long) idle.tv_sec,
+			(idle.tv_nsec / (NSEC_PER_SEC / 100)));
+
+	return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+static int meminfo_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	struct sysinfo i;
+	int len;
+	struct page_state ps;
+	unsigned long inactive;
+	unsigned long active;
+	unsigned long free;
+	unsigned long committed;
+	unsigned long allowed;
+	struct vmalloc_info vmi;
+
+	get_page_state(&ps);
+	get_zone_counts(&active, &inactive, &free);
+
+/*
+ * display in kilobytes.
+ */
+#define K(x) ((x) << (PAGE_SHIFT - 10))
+	si_meminfo(&i);
+	si_swapinfo(&i);
+	committed = atomic_read(&vm_committed_space);
+	allowed = ((totalram_pages - hugetlb_total_pages())
+		* sysctl_overcommit_ratio / 100) + total_swap_pages;
+
+	get_vmalloc_info(&vmi);
+
+	/*
+	 * Tagged format, for easy grepping and expansion.
+	 */
+	len = sprintf(page,
+		"MemTotal:     %8lu kB\n"
+		"MemFree:      %8lu kB\n"
+		"Buffers:      %8lu kB\n"
+		"Cached:       %8lu kB\n"
+		"SwapCached:   %8lu kB\n"
+		"Active:       %8lu kB\n"
+		"Inactive:     %8lu kB\n"
+		"HighTotal:    %8lu kB\n"
+		"HighFree:     %8lu kB\n"
+		"LowTotal:     %8lu kB\n"
+		"LowFree:      %8lu kB\n"
+		"SwapTotal:    %8lu kB\n"
+		"SwapFree:     %8lu kB\n"
+		"Dirty:        %8lu kB\n"
+		"Writeback:    %8lu kB\n"
+		"Mapped:       %8lu kB\n"
+		"Slab:         %8lu kB\n"
+		"CommitLimit:  %8lu kB\n"
+		"Committed_AS: %8lu kB\n"
+		"PageTables:   %8lu kB\n"
+		"VmallocTotal: %8lu kB\n"
+		"VmallocUsed:  %8lu kB\n"
+		"VmallocChunk: %8lu kB\n",
+		K(i.totalram),
+		K(i.freeram),
+		K(i.bufferram),
+		K(get_page_cache_size()-total_swapcache_pages-i.bufferram),
+		K(total_swapcache_pages),
+		K(active),
+		K(inactive),
+		K(i.totalhigh),
+		K(i.freehigh),
+		K(i.totalram-i.totalhigh),
+		K(i.freeram-i.freehigh),
+		K(i.totalswap),
+		K(i.freeswap),
+		K(ps.nr_dirty),
+		K(ps.nr_writeback),
+		K(ps.nr_mapped),
+		K(ps.nr_slab),
+		K(allowed),
+		K(committed),
+		K(ps.nr_page_table_pages),
+		(unsigned long)VMALLOC_TOTAL >> 10,
+		vmi.used >> 10,
+		vmi.largest_chunk >> 10
+		);
+
+		len += hugetlb_report_meminfo(page + len);
+
+	return proc_calc_metrics(page, start, off, count, eof, len);
+#undef K
+}
+
+extern struct seq_operations fragmentation_op;
+static int fragmentation_open(struct inode *inode, struct file *file)
+{
+	(void)inode;
+	return seq_open(file, &fragmentation_op);
+}
+
+static struct file_operations fragmentation_file_operations = {
+	.open		= fragmentation_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+static int version_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	int len;
+
+	strcpy(page, linux_banner);
+	len = strlen(page);
+	return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+extern struct seq_operations cpuinfo_op;
+static int cpuinfo_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &cpuinfo_op);
+}
+static struct file_operations proc_cpuinfo_operations = {
+	.open		= cpuinfo_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+extern struct seq_operations vmstat_op;
+static int vmstat_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &vmstat_op);
+}
+static struct file_operations proc_vmstat_file_operations = {
+	.open		= vmstat_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+#ifdef CONFIG_PROC_HARDWARE
+static int hardware_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	int len = get_hardware_list(page);
+	return proc_calc_metrics(page, start, off, count, eof, len);
+}
+#endif
+
+#ifdef CONFIG_STRAM_PROC
+static int stram_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	int len = get_stram_list(page);
+	return proc_calc_metrics(page, start, off, count, eof, len);
+}
+#endif
+
+extern struct seq_operations partitions_op;
+static int partitions_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &partitions_op);
+}
+static struct file_operations proc_partitions_operations = {
+	.open		= partitions_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+extern struct seq_operations diskstats_op;
+static int diskstats_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &diskstats_op);
+}
+static struct file_operations proc_diskstats_operations = {
+	.open		= diskstats_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+#ifdef CONFIG_MODULES
+extern struct seq_operations modules_op;
+static int modules_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &modules_op);
+}
+static struct file_operations proc_modules_operations = {
+	.open		= modules_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+#endif
+
+extern struct seq_operations slabinfo_op;
+extern ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
+static int slabinfo_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &slabinfo_op);
+}
+static struct file_operations proc_slabinfo_operations = {
+	.open		= slabinfo_open,
+	.read		= seq_read,
+	.write		= slabinfo_write,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+static int show_stat(struct seq_file *p, void *v)
+{
+	int i;
+	unsigned long jif;
+	cputime64_t user, nice, system, idle, iowait, irq, softirq, steal;
+	u64 sum = 0;
+
+	user = nice = system = idle = iowait =
+		irq = softirq = steal = cputime64_zero;
+	jif = - wall_to_monotonic.tv_sec;
+	if (wall_to_monotonic.tv_nsec)
+		--jif;
+
+	for_each_cpu(i) {
+		int j;
+
+		user = cputime64_add(user, kstat_cpu(i).cpustat.user);
+		nice = cputime64_add(nice, kstat_cpu(i).cpustat.nice);
+		system = cputime64_add(system, kstat_cpu(i).cpustat.system);
+		idle = cputime64_add(idle, kstat_cpu(i).cpustat.idle);
+		iowait = cputime64_add(iowait, kstat_cpu(i).cpustat.iowait);
+		irq = cputime64_add(irq, kstat_cpu(i).cpustat.irq);
+		softirq = cputime64_add(softirq, kstat_cpu(i).cpustat.softirq);
+		steal = cputime64_add(steal, kstat_cpu(i).cpustat.steal);
+		for (j = 0 ; j < NR_IRQS ; j++)
+			sum += kstat_cpu(i).irqs[j];
+	}
+
+	seq_printf(p, "cpu  %llu %llu %llu %llu %llu %llu %llu %llu\n",
+		(unsigned long long)cputime64_to_clock_t(user),
+		(unsigned long long)cputime64_to_clock_t(nice),
+		(unsigned long long)cputime64_to_clock_t(system),
+		(unsigned long long)cputime64_to_clock_t(idle),
+		(unsigned long long)cputime64_to_clock_t(iowait),
+		(unsigned long long)cputime64_to_clock_t(irq),
+		(unsigned long long)cputime64_to_clock_t(softirq),
+		(unsigned long long)cputime64_to_clock_t(steal));
+	for_each_online_cpu(i) {
+
+		/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
+		user = kstat_cpu(i).cpustat.user;
+		nice = kstat_cpu(i).cpustat.nice;
+		system = kstat_cpu(i).cpustat.system;
+		idle = kstat_cpu(i).cpustat.idle;
+		iowait = kstat_cpu(i).cpustat.iowait;
+		irq = kstat_cpu(i).cpustat.irq;
+		softirq = kstat_cpu(i).cpustat.softirq;
+		steal = kstat_cpu(i).cpustat.steal;
+		seq_printf(p, "cpu%d %llu %llu %llu %llu %llu %llu %llu %llu\n",
+			i,
+			(unsigned long long)cputime64_to_clock_t(user),
+			(unsigned long long)cputime64_to_clock_t(nice),
+			(unsigned long long)cputime64_to_clock_t(system),
+			(unsigned long long)cputime64_to_clock_t(idle),
+			(unsigned long long)cputime64_to_clock_t(iowait),
+			(unsigned long long)cputime64_to_clock_t(irq),
+			(unsigned long long)cputime64_to_clock_t(softirq),
+			(unsigned long long)cputime64_to_clock_t(steal));
+	}
+	seq_printf(p, "intr %llu", (unsigned long long)sum);
+
+#if !defined(CONFIG_PPC64) && !defined(CONFIG_ALPHA)
+	for (i = 0; i < NR_IRQS; i++)
+		seq_printf(p, " %u", kstat_irqs(i));
+#endif
+
+	seq_printf(p,
+		"\nctxt %llu\n"
+		"btime %lu\n"
+		"processes %lu\n"
+		"procs_running %lu\n"
+		"procs_blocked %lu\n",
+		nr_context_switches(),
+		(unsigned long)jif,
+		total_forks,
+		nr_running(),
+		nr_iowait());
+
+	return 0;
+}
+
+static int stat_open(struct inode *inode, struct file *file)
+{
+	unsigned size = 4096 * (1 + num_possible_cpus() / 32);
+	char *buf;
+	struct seq_file *m;
+	int res;
+
+	/* don't ask for more than the kmalloc() max size, currently 128 KB */
+	if (size > 128 * 1024)
+		size = 128 * 1024;
+	buf = kmalloc(size, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	res = single_open(file, show_stat, NULL);
+	if (!res) {
+		m = file->private_data;
+		m->buf = buf;
+		m->size = size;
+	} else
+		kfree(buf);
+	return res;
+}
+static struct file_operations proc_stat_operations = {
+	.open		= stat_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static int devices_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	int len = get_chrdev_list(page);
+	len += get_blkdev_list(page+len);
+	return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+/*
+ * /proc/interrupts
+ */
+static void *int_seq_start(struct seq_file *f, loff_t *pos)
+{
+	return (*pos <= NR_IRQS) ? pos : NULL;
+}
+
+static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
+{
+	(*pos)++;
+	if (*pos > NR_IRQS)
+		return NULL;
+	return pos;
+}
+
+static void int_seq_stop(struct seq_file *f, void *v)
+{
+	/* Nothing to do */
+}
+
+
+extern int show_interrupts(struct seq_file *f, void *v); /* In arch code */
+static struct seq_operations int_seq_ops = {
+	.start = int_seq_start,
+	.next  = int_seq_next,
+	.stop  = int_seq_stop,
+	.show  = show_interrupts
+};
+
+static int interrupts_open(struct inode *inode, struct file *filp)
+{
+	return seq_open(filp, &int_seq_ops);
+}
+
+static struct file_operations proc_interrupts_operations = {
+	.open		= interrupts_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+static int filesystems_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	int len = get_filesystem_list(page);
+	return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+static int cmdline_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	int len;
+
+	len = sprintf(page, "%s\n", saved_command_line);
+	return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+static int locks_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	int len = get_locks_status(page, start, off, count);
+
+	if (len < count)
+		*eof = 1;
+	return len;
+}
+
+static int execdomains_read_proc(char *page, char **start, off_t off,
+				 int count, int *eof, void *data)
+{
+	int len = get_exec_domain_list(page);
+	return proc_calc_metrics(page, start, off, count, eof, len);
+}
+
+#ifdef CONFIG_MAGIC_SYSRQ
+/*
+ * writing 'C' to /proc/sysrq-trigger is like sysrq-C
+ */
+static ssize_t write_sysrq_trigger(struct file *file, const char __user *buf,
+				   size_t count, loff_t *ppos)
+{
+	if (count) {
+		char c;
+
+		if (get_user(c, buf))
+			return -EFAULT;
+		__handle_sysrq(c, NULL, NULL, 0);
+	}
+	return count;
+}
+
+static struct file_operations proc_sysrq_trigger_operations = {
+	.write		= write_sysrq_trigger,
+};
+#endif
+
+struct proc_dir_entry *proc_root_kcore;
+
+void create_seq_entry(char *name, mode_t mode, struct file_operations *f)
+{
+	struct proc_dir_entry *entry;
+	entry = create_proc_entry(name, mode, NULL);
+	if (entry)
+		entry->proc_fops = f;
+}
+
+void __init proc_misc_init(void)
+{
+	struct proc_dir_entry *entry;
+	static struct {
+		char *name;
+		int (*read_proc)(char*,char**,off_t,int,int*,void*);
+	} *p, simple_ones[] = {
+		{"loadavg",     loadavg_read_proc},
+		{"uptime",	uptime_read_proc},
+		{"meminfo",	meminfo_read_proc},
+		{"version",	version_read_proc},
+#ifdef CONFIG_PROC_HARDWARE
+		{"hardware",	hardware_read_proc},
+#endif
+#ifdef CONFIG_STRAM_PROC
+		{"stram",	stram_read_proc},
+#endif
+		{"devices",	devices_read_proc},
+		{"filesystems",	filesystems_read_proc},
+		{"cmdline",	cmdline_read_proc},
+		{"locks",	locks_read_proc},
+		{"execdomains",	execdomains_read_proc},
+		{NULL,}
+	};
+	for (p = simple_ones; p->name; p++)
+		create_proc_read_entry(p->name, 0, NULL, p->read_proc, NULL);
+
+	proc_symlink("mounts", NULL, "self/mounts");
+
+	/* And now for trickier ones */
+	entry = create_proc_entry("kmsg", S_IRUSR, &proc_root);
+	if (entry)
+		entry->proc_fops = &proc_kmsg_operations;
+	create_seq_entry("cpuinfo", 0, &proc_cpuinfo_operations);
+	create_seq_entry("partitions", 0, &proc_partitions_operations);
+	create_seq_entry("stat", 0, &proc_stat_operations);
+	create_seq_entry("interrupts", 0, &proc_interrupts_operations);
+	create_seq_entry("slabinfo",S_IWUSR|S_IRUGO,&proc_slabinfo_operations);
+	create_seq_entry("buddyinfo",S_IRUGO, &fragmentation_file_operations);
+	create_seq_entry("vmstat",S_IRUGO, &proc_vmstat_file_operations);
+	create_seq_entry("diskstats", 0, &proc_diskstats_operations);
+#ifdef CONFIG_MODULES
+	create_seq_entry("modules", 0, &proc_modules_operations);
+#endif
+#ifdef CONFIG_SCHEDSTATS
+	create_seq_entry("schedstat", 0, &proc_schedstat_operations);
+#endif
+#ifdef CONFIG_PROC_KCORE
+	proc_root_kcore = create_proc_entry("kcore", S_IRUSR, NULL);
+	if (proc_root_kcore) {
+		proc_root_kcore->proc_fops = &proc_kcore_operations;
+		proc_root_kcore->size =
+				(size_t)high_memory - PAGE_OFFSET + PAGE_SIZE;
+	}
+#endif
+#ifdef CONFIG_MAGIC_SYSRQ
+	entry = create_proc_entry("sysrq-trigger", S_IWUSR, NULL);
+	if (entry)
+		entry->proc_fops = &proc_sysrq_trigger_operations;
+#endif
+#ifdef CONFIG_PPC32
+	{
+		extern struct file_operations ppc_htab_operations;
+		entry = create_proc_entry("ppc_htab", S_IRUGO|S_IWUSR, NULL);
+		if (entry)
+			entry->proc_fops = &ppc_htab_operations;
+	}
+#endif
+}
diff --git a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c
new file mode 100644
index 0000000..15c4455
--- /dev/null
+++ b/fs/proc/proc_tty.c
@@ -0,0 +1,242 @@
+/*
+ * proc_tty.c -- handles /proc/tty
+ *
+ * Copyright 1997, Theodore Ts'o
+ */
+
+#include <asm/uaccess.h>
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/tty.h>
+#include <linux/seq_file.h>
+#include <linux/bitops.h>
+
+static int tty_ldiscs_read_proc(char *page, char **start, off_t off,
+				int count, int *eof, void *data);
+
+/*
+ * The /proc/tty directory inodes...
+ */
+static struct proc_dir_entry *proc_tty_ldisc, *proc_tty_driver;
+
+/*
+ * This is the handler for /proc/tty/drivers
+ */
+static void show_tty_range(struct seq_file *m, struct tty_driver *p,
+	dev_t from, int num)
+{
+	seq_printf(m, "%-20s ", p->driver_name ? p->driver_name : "unknown");
+	seq_printf(m, "/dev/%-8s ", p->name);
+	if (p->num > 1) {
+		seq_printf(m, "%3d %d-%d ", MAJOR(from), MINOR(from),
+			MINOR(from) + num - 1);
+	} else {
+		seq_printf(m, "%3d %7d ", MAJOR(from), MINOR(from));
+	}
+	switch (p->type) {
+	case TTY_DRIVER_TYPE_SYSTEM:
+		seq_printf(m, "system");
+		if (p->subtype == SYSTEM_TYPE_TTY)
+			seq_printf(m, ":/dev/tty");
+		else if (p->subtype == SYSTEM_TYPE_SYSCONS)
+			seq_printf(m, ":console");
+		else if (p->subtype == SYSTEM_TYPE_CONSOLE)
+			seq_printf(m, ":vtmaster");
+		break;
+	case TTY_DRIVER_TYPE_CONSOLE:
+		seq_printf(m, "console");
+		break;
+	case TTY_DRIVER_TYPE_SERIAL:
+		seq_printf(m, "serial");
+		break;
+	case TTY_DRIVER_TYPE_PTY:
+		if (p->subtype == PTY_TYPE_MASTER)
+			seq_printf(m, "pty:master");
+		else if (p->subtype == PTY_TYPE_SLAVE)
+			seq_printf(m, "pty:slave");
+		else
+			seq_printf(m, "pty");
+		break;
+	default:
+		seq_printf(m, "type:%d.%d", p->type, p->subtype);
+	}
+	seq_putc(m, '\n');
+}
+
+static int show_tty_driver(struct seq_file *m, void *v)
+{
+	struct tty_driver *p = v;
+	dev_t from = MKDEV(p->major, p->minor_start);
+	dev_t to = from + p->num;
+
+	if (&p->tty_drivers == tty_drivers.next) {
+		/* pseudo-drivers first */
+		seq_printf(m, "%-20s /dev/%-8s ", "/dev/tty", "tty");
+		seq_printf(m, "%3d %7d ", TTYAUX_MAJOR, 0);
+		seq_printf(m, "system:/dev/tty\n");
+		seq_printf(m, "%-20s /dev/%-8s ", "/dev/console", "console");
+		seq_printf(m, "%3d %7d ", TTYAUX_MAJOR, 1);
+		seq_printf(m, "system:console\n");
+#ifdef CONFIG_UNIX98_PTYS
+		seq_printf(m, "%-20s /dev/%-8s ", "/dev/ptmx", "ptmx");
+		seq_printf(m, "%3d %7d ", TTYAUX_MAJOR, 2);
+		seq_printf(m, "system\n");
+#endif
+#ifdef CONFIG_VT
+		seq_printf(m, "%-20s /dev/%-8s ", "/dev/vc/0", "vc/0");
+		seq_printf(m, "%3d %7d ", TTY_MAJOR, 0);
+		seq_printf(m, "system:vtmaster\n");
+#endif
+	}
+
+	while (MAJOR(from) < MAJOR(to)) {
+		dev_t next = MKDEV(MAJOR(from)+1, 0);
+		show_tty_range(m, p, from, next - from);
+		from = next;
+	}
+	if (from != to)
+		show_tty_range(m, p, from, to - from);
+	return 0;
+}
+
+/* iterator */
+static void *t_start(struct seq_file *m, loff_t *pos)
+{
+	struct list_head *p;
+	loff_t l = *pos;
+	list_for_each(p, &tty_drivers)
+		if (!l--)
+			return list_entry(p, struct tty_driver, tty_drivers);
+	return NULL;
+}
+
+static void *t_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	struct list_head *p = ((struct tty_driver *)v)->tty_drivers.next;
+	(*pos)++;
+	return p==&tty_drivers ? NULL :
+			list_entry(p, struct tty_driver, tty_drivers);
+}
+
+static void t_stop(struct seq_file *m, void *v)
+{
+}
+
+static struct seq_operations tty_drivers_op = {
+	.start	= t_start,
+	.next	= t_next,
+	.stop	= t_stop,
+	.show	= show_tty_driver
+};
+
+static int tty_drivers_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &tty_drivers_op);
+}
+
+static struct file_operations proc_tty_drivers_operations = {
+	.open		= tty_drivers_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+/*
+ * This is the handler for /proc/tty/ldiscs
+ */
+static int tty_ldiscs_read_proc(char *page, char **start, off_t off,
+				int count, int *eof, void *data)
+{
+	int	i;
+	int	len = 0;
+	off_t	begin = 0;
+	struct tty_ldisc *ld;
+	
+	for (i=0; i < NR_LDISCS; i++) {
+		ld = tty_ldisc_get(i);
+		if (ld == NULL)
+			continue;
+		len += sprintf(page+len, "%-10s %2d\n",
+			       ld->name ? ld->name : "???", i);
+		tty_ldisc_put(i);
+		if (len+begin > off+count)
+			break;
+		if (len+begin < off) {
+			begin += len;
+			len = 0;
+		}
+	}
+	if (i >= NR_LDISCS)
+		*eof = 1;
+	if (off >= len+begin)
+		return 0;
+	*start = page + (off-begin);
+	return ((count < begin+len-off) ? count : begin+len-off);
+}
+
+/*
+ * This function is called by tty_register_driver() to handle
+ * registering the driver's /proc handler into /proc/tty/driver/<foo>
+ */
+void proc_tty_register_driver(struct tty_driver *driver)
+{
+	struct proc_dir_entry *ent;
+		
+	if ((!driver->read_proc && !driver->write_proc) ||
+	    !driver->driver_name ||
+	    driver->proc_entry)
+		return;
+
+	ent = create_proc_entry(driver->driver_name, 0, proc_tty_driver);
+	if (!ent)
+		return;
+	ent->read_proc = driver->read_proc;
+	ent->write_proc = driver->write_proc;
+	ent->owner = driver->owner;
+	ent->data = driver;
+
+	driver->proc_entry = ent;
+}
+
+/*
+ * This function is called by tty_unregister_driver()
+ */
+void proc_tty_unregister_driver(struct tty_driver *driver)
+{
+	struct proc_dir_entry *ent;
+
+	ent = driver->proc_entry;
+	if (!ent)
+		return;
+		
+	remove_proc_entry(driver->driver_name, proc_tty_driver);
+	
+	driver->proc_entry = NULL;
+}
+
+/*
+ * Called by proc_root_init() to initialize the /proc/tty subtree
+ */
+void __init proc_tty_init(void)
+{
+	struct proc_dir_entry *entry;
+	if (!proc_mkdir("tty", NULL))
+		return;
+	proc_tty_ldisc = proc_mkdir("tty/ldisc", NULL);
+	/*
+	 * /proc/tty/driver/serial reveals the exact character counts for
+	 * serial links which is just too easy to abuse for inferring
+	 * password lengths and inter-keystroke timings during password
+	 * entry.
+	 */
+	proc_tty_driver = proc_mkdir_mode("tty/driver", S_IRUSR | S_IXUSR, NULL);
+
+	create_proc_read_entry("tty/ldiscs", 0, NULL, tty_ldiscs_read_proc, NULL);
+	entry = create_proc_entry("tty/drivers", 0, NULL);
+	if (entry)
+		entry->proc_fops = &proc_tty_drivers_operations;
+}
diff --git a/fs/proc/root.c b/fs/proc/root.c
new file mode 100644
index 0000000..aef148f
--- /dev/null
+++ b/fs/proc/root.c
@@ -0,0 +1,161 @@
+/*
+ *  linux/fs/proc/root.c
+ *
+ *  Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ *  proc root directory handling functions
+ */
+
+#include <asm/uaccess.h>
+
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/proc_fs.h>
+#include <linux/stat.h>
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/smp_lock.h>
+
+struct proc_dir_entry *proc_net, *proc_net_stat, *proc_bus, *proc_root_fs, *proc_root_driver;
+
+#ifdef CONFIG_SYSCTL
+struct proc_dir_entry *proc_sys_root;
+#endif
+
+static struct super_block *proc_get_sb(struct file_system_type *fs_type,
+	int flags, const char *dev_name, void *data)
+{
+	return get_sb_single(fs_type, flags, data, proc_fill_super);
+}
+
+static struct file_system_type proc_fs_type = {
+	.name		= "proc",
+	.get_sb		= proc_get_sb,
+	.kill_sb	= kill_anon_super,
+};
+
+extern int __init proc_init_inodecache(void);
+void __init proc_root_init(void)
+{
+	int err = proc_init_inodecache();
+	if (err)
+		return;
+	err = register_filesystem(&proc_fs_type);
+	if (err)
+		return;
+	proc_mnt = kern_mount(&proc_fs_type);
+	err = PTR_ERR(proc_mnt);
+	if (IS_ERR(proc_mnt)) {
+		unregister_filesystem(&proc_fs_type);
+		return;
+	}
+	proc_misc_init();
+	proc_net = proc_mkdir("net", NULL);
+	proc_net_stat = proc_mkdir("net/stat", NULL);
+
+#ifdef CONFIG_SYSVIPC
+	proc_mkdir("sysvipc", NULL);
+#endif
+#ifdef CONFIG_SYSCTL
+	proc_sys_root = proc_mkdir("sys", NULL);
+#endif
+#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
+	proc_mkdir("sys/fs", NULL);
+	proc_mkdir("sys/fs/binfmt_misc", NULL);
+#endif
+	proc_root_fs = proc_mkdir("fs", NULL);
+	proc_root_driver = proc_mkdir("driver", NULL);
+	proc_mkdir("fs/nfsd", NULL); /* somewhere for the nfsd filesystem to be mounted */
+#if defined(CONFIG_SUN_OPENPROMFS) || defined(CONFIG_SUN_OPENPROMFS_MODULE)
+	/* just give it a mountpoint */
+	proc_mkdir("openprom", NULL);
+#endif
+	proc_tty_init();
+#ifdef CONFIG_PROC_DEVICETREE
+	proc_device_tree_init();
+#endif
+	proc_bus = proc_mkdir("bus", NULL);
+}
+
+static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, struct nameidata *nd)
+{
+	/*
+	 * nr_threads is actually protected by the tasklist_lock;
+	 * however, it's conventional to do reads, especially for
+	 * reporting, without any locking whatsoever.
+	 */
+	if (dir->i_ino == PROC_ROOT_INO) /* check for safety... */
+		dir->i_nlink = proc_root.nlink + nr_threads;
+
+	if (!proc_lookup(dir, dentry, nd)) {
+		return NULL;
+	}
+	
+	return proc_pid_lookup(dir, dentry, nd);
+}
+
+static int proc_root_readdir(struct file * filp,
+	void * dirent, filldir_t filldir)
+{
+	unsigned int nr = filp->f_pos;
+	int ret;
+
+	lock_kernel();
+
+	if (nr < FIRST_PROCESS_ENTRY) {
+		int error = proc_readdir(filp, dirent, filldir);
+		if (error <= 0) {
+			unlock_kernel();
+			return error;
+		}
+		filp->f_pos = FIRST_PROCESS_ENTRY;
+	}
+	unlock_kernel();
+
+	ret = proc_pid_readdir(filp, dirent, filldir);
+	return ret;
+}
+
+/*
+ * The root /proc directory is special, as it has the
+ * <pid> directories. Thus we don't use the generic
+ * directory handling functions for that..
+ */
+static struct file_operations proc_root_operations = {
+	.read		 = generic_read_dir,
+	.readdir	 = proc_root_readdir,
+};
+
+/*
+ * proc root can do almost nothing..
+ */
+static struct inode_operations proc_root_inode_operations = {
+	.lookup		= proc_root_lookup,
+};
+
+/*
+ * This is the root "inode" in the /proc tree..
+ */
+struct proc_dir_entry proc_root = {
+	.low_ino	= PROC_ROOT_INO, 
+	.namelen	= 5, 
+	.name		= "/proc",
+	.mode		= S_IFDIR | S_IRUGO | S_IXUGO, 
+	.nlink		= 2, 
+	.proc_iops	= &proc_root_inode_operations, 
+	.proc_fops	= &proc_root_operations,
+	.parent		= &proc_root,
+};
+
+EXPORT_SYMBOL(proc_symlink);
+EXPORT_SYMBOL(proc_mkdir);
+EXPORT_SYMBOL(create_proc_entry);
+EXPORT_SYMBOL(remove_proc_entry);
+EXPORT_SYMBOL(proc_root);
+EXPORT_SYMBOL(proc_root_fs);
+EXPORT_SYMBOL(proc_net);
+EXPORT_SYMBOL(proc_net_stat);
+EXPORT_SYMBOL(proc_bus);
+EXPORT_SYMBOL(proc_root_driver);
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
new file mode 100644
index 0000000..28b4a02
--- /dev/null
+++ b/fs/proc/task_mmu.c
@@ -0,0 +1,235 @@
+#include <linux/mm.h>
+#include <linux/hugetlb.h>
+#include <linux/mount.h>
+#include <linux/seq_file.h>
+#include <asm/elf.h>
+#include <asm/uaccess.h>
+#include "internal.h"
+
+char *task_mem(struct mm_struct *mm, char *buffer)
+{
+	unsigned long data, text, lib;
+
+	data = mm->total_vm - mm->shared_vm - mm->stack_vm;
+	text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK)) >> 10;
+	lib = (mm->exec_vm << (PAGE_SHIFT-10)) - text;
+	buffer += sprintf(buffer,
+		"VmSize:\t%8lu kB\n"
+		"VmLck:\t%8lu kB\n"
+		"VmRSS:\t%8lu kB\n"
+		"VmData:\t%8lu kB\n"
+		"VmStk:\t%8lu kB\n"
+		"VmExe:\t%8lu kB\n"
+		"VmLib:\t%8lu kB\n"
+		"VmPTE:\t%8lu kB\n",
+		(mm->total_vm - mm->reserved_vm) << (PAGE_SHIFT-10),
+		mm->locked_vm << (PAGE_SHIFT-10),
+		get_mm_counter(mm, rss) << (PAGE_SHIFT-10),
+		data << (PAGE_SHIFT-10),
+		mm->stack_vm << (PAGE_SHIFT-10), text, lib,
+		(PTRS_PER_PTE*sizeof(pte_t)*mm->nr_ptes) >> 10);
+	return buffer;
+}
+
+unsigned long task_vsize(struct mm_struct *mm)
+{
+	return PAGE_SIZE * mm->total_vm;
+}
+
+int task_statm(struct mm_struct *mm, int *shared, int *text,
+	       int *data, int *resident)
+{
+	int rss = get_mm_counter(mm, rss);
+
+	*shared = rss - get_mm_counter(mm, anon_rss);
+	*text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
+								>> PAGE_SHIFT;
+	*data = mm->total_vm - mm->shared_vm;
+	*resident = rss;
+	return mm->total_vm;
+}
+
+int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+	struct vm_area_struct * vma;
+	int result = -ENOENT;
+	struct task_struct *task = proc_task(inode);
+	struct mm_struct * mm = get_task_mm(task);
+
+	if (!mm)
+		goto out;
+	down_read(&mm->mmap_sem);
+
+	vma = mm->mmap;
+	while (vma) {
+		if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file)
+			break;
+		vma = vma->vm_next;
+	}
+
+	if (vma) {
+		*mnt = mntget(vma->vm_file->f_vfsmnt);
+		*dentry = dget(vma->vm_file->f_dentry);
+		result = 0;
+	}
+
+	up_read(&mm->mmap_sem);
+	mmput(mm);
+out:
+	return result;
+}
+
+static void pad_len_spaces(struct seq_file *m, int len)
+{
+	len = 25 + sizeof(void*) * 6 - len;
+	if (len < 1)
+		len = 1;
+	seq_printf(m, "%*c", len, ' ');
+}
+
+static int show_map(struct seq_file *m, void *v)
+{
+	struct task_struct *task = m->private;
+	struct vm_area_struct *map = v;
+	struct mm_struct *mm = map->vm_mm;
+	struct file *file = map->vm_file;
+	int flags = map->vm_flags;
+	unsigned long ino = 0;
+	dev_t dev = 0;
+	int len;
+
+	if (file) {
+		struct inode *inode = map->vm_file->f_dentry->d_inode;
+		dev = inode->i_sb->s_dev;
+		ino = inode->i_ino;
+	}
+
+	seq_printf(m, "%08lx-%08lx %c%c%c%c %08lx %02x:%02x %lu %n",
+			map->vm_start,
+			map->vm_end,
+			flags & VM_READ ? 'r' : '-',
+			flags & VM_WRITE ? 'w' : '-',
+			flags & VM_EXEC ? 'x' : '-',
+			flags & VM_MAYSHARE ? 's' : 'p',
+			map->vm_pgoff << PAGE_SHIFT,
+			MAJOR(dev), MINOR(dev), ino, &len);
+
+	/*
+	 * Print the dentry name for named mappings, and a
+	 * special [heap] marker for the heap:
+	 */
+	if (map->vm_file) {
+		pad_len_spaces(m, len);
+		seq_path(m, file->f_vfsmnt, file->f_dentry, "");
+	} else {
+		if (mm) {
+			if (map->vm_start <= mm->start_brk &&
+						map->vm_end >= mm->brk) {
+				pad_len_spaces(m, len);
+				seq_puts(m, "[heap]");
+			} else {
+				if (map->vm_start <= mm->start_stack &&
+					map->vm_end >= mm->start_stack) {
+
+					pad_len_spaces(m, len);
+					seq_puts(m, "[stack]");
+				}
+			}
+		} else {
+			pad_len_spaces(m, len);
+			seq_puts(m, "[vdso]");
+		}
+	}
+	seq_putc(m, '\n');
+	if (m->count < m->size)  /* map is copied successfully */
+		m->version = (map != get_gate_vma(task))? map->vm_start: 0;
+	return 0;
+}
+
+static void *m_start(struct seq_file *m, loff_t *pos)
+{
+	struct task_struct *task = m->private;
+	unsigned long last_addr = m->version;
+	struct mm_struct *mm;
+	struct vm_area_struct *map, *tail_map;
+	loff_t l = *pos;
+
+	/*
+	 * We remember last_addr rather than next_addr to hit with
+	 * mmap_cache most of the time. We have zero last_addr at
+	 * the begining and also after lseek. We will have -1 last_addr
+	 * after the end of the maps.
+	 */
+
+	if (last_addr == -1UL)
+		return NULL;
+
+	mm = get_task_mm(task);
+	if (!mm)
+		return NULL;
+
+	tail_map = get_gate_vma(task);
+	down_read(&mm->mmap_sem);
+
+	/* Start with last addr hint */
+	if (last_addr && (map = find_vma(mm, last_addr))) {
+		map = map->vm_next;
+		goto out;
+	}
+
+	/*
+	 * Check the map index is within the range and do
+	 * sequential scan until m_index.
+	 */
+	map = NULL;
+	if ((unsigned long)l < mm->map_count) {
+		map = mm->mmap;
+		while (l-- && map)
+			map = map->vm_next;
+		goto out;
+	}
+
+	if (l != mm->map_count)
+		tail_map = NULL; /* After gate map */
+
+out:
+	if (map)
+		return map;
+
+	/* End of maps has reached */
+	m->version = (tail_map != NULL)? 0: -1UL;
+	up_read(&mm->mmap_sem);
+	mmput(mm);
+	return tail_map;
+}
+
+static void m_stop(struct seq_file *m, void *v)
+{
+	struct task_struct *task = m->private;
+	struct vm_area_struct *map = v;
+	if (map && map != get_gate_vma(task)) {
+		struct mm_struct *mm = map->vm_mm;
+		up_read(&mm->mmap_sem);
+		mmput(mm);
+	}
+}
+
+static void *m_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	struct task_struct *task = m->private;
+	struct vm_area_struct *map = v;
+	struct vm_area_struct *tail_map = get_gate_vma(task);
+
+	(*pos)++;
+	if (map && (map != tail_map) && map->vm_next)
+		return map->vm_next;
+	m_stop(m, v);
+	return (map != tail_map)? tail_map: NULL;
+}
+
+struct seq_operations proc_pid_maps_op = {
+	.start	= m_start,
+	.next	= m_next,
+	.stop	= m_stop,
+	.show	= show_map
+};
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
new file mode 100644
index 0000000..8f68827
--- /dev/null
+++ b/fs/proc/task_nommu.c
@@ -0,0 +1,164 @@
+
+#include <linux/mm.h>
+#include <linux/file.h>
+#include <linux/mount.h>
+#include <linux/seq_file.h>
+#include "internal.h"
+
+/*
+ * Logic: we've got two memory sums for each process, "shared", and
+ * "non-shared". Shared memory may get counted more then once, for
+ * each process that owns it. Non-shared memory is counted
+ * accurately.
+ */
+char *task_mem(struct mm_struct *mm, char *buffer)
+{
+	struct vm_list_struct *vml;
+	unsigned long bytes = 0, sbytes = 0, slack = 0;
+        
+	down_read(&mm->mmap_sem);
+	for (vml = mm->context.vmlist; vml; vml = vml->next) {
+		if (!vml->vma)
+			continue;
+
+		bytes += kobjsize(vml);
+		if (atomic_read(&mm->mm_count) > 1 ||
+		    atomic_read(&vml->vma->vm_usage) > 1
+		    ) {
+			sbytes += kobjsize((void *) vml->vma->vm_start);
+			sbytes += kobjsize(vml->vma);
+		} else {
+			bytes += kobjsize((void *) vml->vma->vm_start);
+			bytes += kobjsize(vml->vma);
+			slack += kobjsize((void *) vml->vma->vm_start) -
+				(vml->vma->vm_end - vml->vma->vm_start);
+		}
+	}
+
+	if (atomic_read(&mm->mm_count) > 1)
+		sbytes += kobjsize(mm);
+	else
+		bytes += kobjsize(mm);
+	
+	if (current->fs && atomic_read(&current->fs->count) > 1)
+		sbytes += kobjsize(current->fs);
+	else
+		bytes += kobjsize(current->fs);
+
+	if (current->files && atomic_read(&current->files->count) > 1)
+		sbytes += kobjsize(current->files);
+	else
+		bytes += kobjsize(current->files);
+
+	if (current->sighand && atomic_read(&current->sighand->count) > 1)
+		sbytes += kobjsize(current->sighand);
+	else
+		bytes += kobjsize(current->sighand);
+
+	bytes += kobjsize(current); /* includes kernel stack */
+
+	buffer += sprintf(buffer,
+		"Mem:\t%8lu bytes\n"
+		"Slack:\t%8lu bytes\n"
+		"Shared:\t%8lu bytes\n",
+		bytes, slack, sbytes);
+
+	up_read(&mm->mmap_sem);
+	return buffer;
+}
+
+unsigned long task_vsize(struct mm_struct *mm)
+{
+	struct vm_list_struct *tbp;
+	unsigned long vsize = 0;
+
+	down_read(&mm->mmap_sem);
+	for (tbp = mm->context.vmlist; tbp; tbp = tbp->next) {
+		if (tbp->vma)
+			vsize += kobjsize((void *) tbp->vma->vm_start);
+	}
+	up_read(&mm->mmap_sem);
+	return vsize;
+}
+
+int task_statm(struct mm_struct *mm, int *shared, int *text,
+	       int *data, int *resident)
+{
+	struct vm_list_struct *tbp;
+	int size = kobjsize(mm);
+
+	down_read(&mm->mmap_sem);
+	for (tbp = mm->context.vmlist; tbp; tbp = tbp->next) {
+		size += kobjsize(tbp);
+		if (tbp->vma) {
+			size += kobjsize(tbp->vma);
+			size += kobjsize((void *) tbp->vma->vm_start);
+		}
+	}
+
+	size += (*text = mm->end_code - mm->start_code);
+	size += (*data = mm->start_stack - mm->start_data);
+	up_read(&mm->mmap_sem);
+	*resident = size;
+	return size;
+}
+
+int proc_exe_link(struct inode *inode, struct dentry **dentry, struct vfsmount **mnt)
+{
+	struct vm_list_struct *vml;
+	struct vm_area_struct *vma;
+	struct task_struct *task = proc_task(inode);
+	struct mm_struct *mm = get_task_mm(task);
+	int result = -ENOENT;
+
+	if (!mm)
+		goto out;
+	down_read(&mm->mmap_sem);
+
+	vml = mm->context.vmlist;
+	vma = NULL;
+	while (vml) {
+		if ((vml->vma->vm_flags & VM_EXECUTABLE) && vml->vma->vm_file) {
+			vma = vml->vma;
+			break;
+		}
+		vml = vml->next;
+	}
+
+	if (vma) {
+		*mnt = mntget(vma->vm_file->f_vfsmnt);
+		*dentry = dget(vma->vm_file->f_dentry);
+		result = 0;
+	}
+
+	up_read(&mm->mmap_sem);
+	mmput(mm);
+out:
+	return result;
+}
+
+/*
+ * Albert D. Cahalan suggested to fake entries for the traditional
+ * sections here.  This might be worth investigating.
+ */
+static int show_map(struct seq_file *m, void *v)
+{
+	return 0;
+}
+static void *m_start(struct seq_file *m, loff_t *pos)
+{
+	return NULL;
+}
+static void m_stop(struct seq_file *m, void *v)
+{
+}
+static void *m_next(struct seq_file *m, void *v, loff_t *pos)
+{
+	return NULL;
+}
+struct seq_operations proc_pid_maps_op = {
+	.start	= m_start,
+	.next	= m_next,
+	.stop	= m_stop,
+	.show	= show_map
+};