Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y

1 files changed, 2821 insertions, 0 deletions

diff --git a/kernel/module.c b/kernel/module.c
new file mode 100644
index 0000000..79fd4d2
--- /dev/null
+++ b/kernel/module.c
@@ -0,0 +1,2821 @@
+/*
+   Copyright (C) 2002 Richard Henderson
+   Copyright (C) 2001 Rusty Russell, 2002 Rusty Russell IBM.
+
+    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.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+#include <linux/module.h>
+#include <linux/moduleloader.h>
+#include <linux/init.h>
+#include <linux/kallsyms.h>
+#include <linux/fs.h>
+#include <linux/sysfs.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/elf.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/syscalls.h>
+#include <linux/fcntl.h>
+#include <linux/rcupdate.h>
+#include <linux/capability.h>
+#include <linux/cpu.h>
+#include <linux/moduleparam.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/vermagic.h>
+#include <linux/notifier.h>
+#include <linux/sched.h>
+#include <linux/stop_machine.h>
+#include <linux/device.h>
+#include <linux/string.h>
+#include <linux/mutex.h>
+#include <linux/unwind.h>
+#include <linux/rculist.h>
+#include <asm/uaccess.h>
+#include <asm/cacheflush.h>
+#include <linux/license.h>
+#include <asm/sections.h>
+#include <linux/tracepoint.h>
+#include <linux/ftrace.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt , a...)
+#endif
+
+#ifndef ARCH_SHF_SMALL
+#define ARCH_SHF_SMALL 0
+#endif
+
+/* If this is set, the section belongs in the init part of the module */
+#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
+
+/* List of modules, protected by module_mutex or preempt_disable
+ * (delete uses stop_machine/add uses RCU list operations). */
+static DEFINE_MUTEX(module_mutex);
+static LIST_HEAD(modules);
+
+/* Waiting for a module to finish initializing? */
+static DECLARE_WAIT_QUEUE_HEAD(module_wq);
+
+static BLOCKING_NOTIFIER_HEAD(module_notify_list);
+
+/* Bounds of module allocation, for speeding __module_text_address */
+static unsigned long module_addr_min = -1UL, module_addr_max = 0;
+
+int register_module_notifier(struct notifier_block * nb)
+{
+	return blocking_notifier_chain_register(&module_notify_list, nb);
+}
+EXPORT_SYMBOL(register_module_notifier);
+
+int unregister_module_notifier(struct notifier_block * nb)
+{
+	return blocking_notifier_chain_unregister(&module_notify_list, nb);
+}
+EXPORT_SYMBOL(unregister_module_notifier);
+
+/* We require a truly strong try_module_get(): 0 means failure due to
+   ongoing or failed initialization etc. */
+static inline int strong_try_module_get(struct module *mod)
+{
+	if (mod && mod->state == MODULE_STATE_COMING)
+		return -EBUSY;
+	if (try_module_get(mod))
+		return 0;
+	else
+		return -ENOENT;
+}
+
+static inline void add_taint_module(struct module *mod, unsigned flag)
+{
+	add_taint(flag);
+	mod->taints |= (1U << flag);
+}
+
+/*
+ * A thread that wants to hold a reference to a module only while it
+ * is running can call this to safely exit.  nfsd and lockd use this.
+ */
+void __module_put_and_exit(struct module *mod, long code)
+{
+	module_put(mod);
+	do_exit(code);
+}
+EXPORT_SYMBOL(__module_put_and_exit);
+
+/* Find a module section: 0 means not found. */
+static unsigned int find_sec(Elf_Ehdr *hdr,
+			     Elf_Shdr *sechdrs,
+			     const char *secstrings,
+			     const char *name)
+{
+	unsigned int i;
+
+	for (i = 1; i < hdr->e_shnum; i++)
+		/* Alloc bit cleared means "ignore it." */
+		if ((sechdrs[i].sh_flags & SHF_ALLOC)
+		    && strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
+			return i;
+	return 0;
+}
+
+/* Find a module section, or NULL. */
+static void *section_addr(Elf_Ehdr *hdr, Elf_Shdr *shdrs,
+			  const char *secstrings, const char *name)
+{
+	/* Section 0 has sh_addr 0. */
+	return (void *)shdrs[find_sec(hdr, shdrs, secstrings, name)].sh_addr;
+}
+
+/* Find a module section, or NULL.  Fill in number of "objects" in section. */
+static void *section_objs(Elf_Ehdr *hdr,
+			  Elf_Shdr *sechdrs,
+			  const char *secstrings,
+			  const char *name,
+			  size_t object_size,
+			  unsigned int *num)
+{
+	unsigned int sec = find_sec(hdr, sechdrs, secstrings, name);
+
+	/* Section 0 has sh_addr 0 and sh_size 0. */
+	*num = sechdrs[sec].sh_size / object_size;
+	return (void *)sechdrs[sec].sh_addr;
+}
+
+/* Provided by the linker */
+extern const struct kernel_symbol __start___ksymtab[];
+extern const struct kernel_symbol __stop___ksymtab[];
+extern const struct kernel_symbol __start___ksymtab_gpl[];
+extern const struct kernel_symbol __stop___ksymtab_gpl[];
+extern const struct kernel_symbol __start___ksymtab_gpl_future[];
+extern const struct kernel_symbol __stop___ksymtab_gpl_future[];
+extern const struct kernel_symbol __start___ksymtab_gpl_future[];
+extern const struct kernel_symbol __stop___ksymtab_gpl_future[];
+extern const unsigned long __start___kcrctab[];
+extern const unsigned long __start___kcrctab_gpl[];
+extern const unsigned long __start___kcrctab_gpl_future[];
+#ifdef CONFIG_UNUSED_SYMBOLS
+extern const struct kernel_symbol __start___ksymtab_unused[];
+extern const struct kernel_symbol __stop___ksymtab_unused[];
+extern const struct kernel_symbol __start___ksymtab_unused_gpl[];
+extern const struct kernel_symbol __stop___ksymtab_unused_gpl[];
+extern const unsigned long __start___kcrctab_unused[];
+extern const unsigned long __start___kcrctab_unused_gpl[];
+#endif
+
+#ifndef CONFIG_MODVERSIONS
+#define symversion(base, idx) NULL
+#else
+#define symversion(base, idx) ((base != NULL) ? ((base) + (idx)) : NULL)
+#endif
+
+struct symsearch {
+	const struct kernel_symbol *start, *stop;
+	const unsigned long *crcs;
+	enum {
+		NOT_GPL_ONLY,
+		GPL_ONLY,
+		WILL_BE_GPL_ONLY,
+	} licence;
+	bool unused;
+};
+
+static bool each_symbol_in_section(const struct symsearch *arr,
+				   unsigned int arrsize,
+				   struct module *owner,
+				   bool (*fn)(const struct symsearch *syms,
+					      struct module *owner,
+					      unsigned int symnum, void *data),
+				   void *data)
+{
+	unsigned int i, j;
+
+	for (j = 0; j < arrsize; j++) {
+		for (i = 0; i < arr[j].stop - arr[j].start; i++)
+			if (fn(&arr[j], owner, i, data))
+				return true;
+	}
+
+	return false;
+}
+
+/* Returns true as soon as fn returns true, otherwise false. */
+static bool each_symbol(bool (*fn)(const struct symsearch *arr,
+				   struct module *owner,
+				   unsigned int symnum, void *data),
+			void *data)
+{
+	struct module *mod;
+	const struct symsearch arr[] = {
+		{ __start___ksymtab, __stop___ksymtab, __start___kcrctab,
+		  NOT_GPL_ONLY, false },
+		{ __start___ksymtab_gpl, __stop___ksymtab_gpl,
+		  __start___kcrctab_gpl,
+		  GPL_ONLY, false },
+		{ __start___ksymtab_gpl_future, __stop___ksymtab_gpl_future,
+		  __start___kcrctab_gpl_future,
+		  WILL_BE_GPL_ONLY, false },
+#ifdef CONFIG_UNUSED_SYMBOLS
+		{ __start___ksymtab_unused, __stop___ksymtab_unused,
+		  __start___kcrctab_unused,
+		  NOT_GPL_ONLY, true },
+		{ __start___ksymtab_unused_gpl, __stop___ksymtab_unused_gpl,
+		  __start___kcrctab_unused_gpl,
+		  GPL_ONLY, true },
+#endif
+	};
+
+	if (each_symbol_in_section(arr, ARRAY_SIZE(arr), NULL, fn, data))
+		return true;
+
+	list_for_each_entry_rcu(mod, &modules, list) {
+		struct symsearch arr[] = {
+			{ mod->syms, mod->syms + mod->num_syms, mod->crcs,
+			  NOT_GPL_ONLY, false },
+			{ mod->gpl_syms, mod->gpl_syms + mod->num_gpl_syms,
+			  mod->gpl_crcs,
+			  GPL_ONLY, false },
+			{ mod->gpl_future_syms,
+			  mod->gpl_future_syms + mod->num_gpl_future_syms,
+			  mod->gpl_future_crcs,
+			  WILL_BE_GPL_ONLY, false },
+#ifdef CONFIG_UNUSED_SYMBOLS
+			{ mod->unused_syms,
+			  mod->unused_syms + mod->num_unused_syms,
+			  mod->unused_crcs,
+			  NOT_GPL_ONLY, true },
+			{ mod->unused_gpl_syms,
+			  mod->unused_gpl_syms + mod->num_unused_gpl_syms,
+			  mod->unused_gpl_crcs,
+			  GPL_ONLY, true },
+#endif
+		};
+
+		if (each_symbol_in_section(arr, ARRAY_SIZE(arr), mod, fn, data))
+			return true;
+	}
+	return false;
+}
+
+struct find_symbol_arg {
+	/* Input */
+	const char *name;
+	bool gplok;
+	bool warn;
+
+	/* Output */
+	struct module *owner;
+	const unsigned long *crc;
+	unsigned long value;
+};
+
+static bool find_symbol_in_section(const struct symsearch *syms,
+				   struct module *owner,
+				   unsigned int symnum, void *data)
+{
+	struct find_symbol_arg *fsa = data;
+
+	if (strcmp(syms->start[symnum].name, fsa->name) != 0)
+		return false;
+
+	if (!fsa->gplok) {
+		if (syms->licence == GPL_ONLY)
+			return false;
+		if (syms->licence == WILL_BE_GPL_ONLY && fsa->warn) {
+			printk(KERN_WARNING "Symbol %s is being used "
+			       "by a non-GPL module, which will not "
+			       "be allowed in the future\n", fsa->name);
+			printk(KERN_WARNING "Please see the file "
+			       "Documentation/feature-removal-schedule.txt "
+			       "in the kernel source tree for more details.\n");
+		}
+	}
+
+#ifdef CONFIG_UNUSED_SYMBOLS
+	if (syms->unused && fsa->warn) {
+		printk(KERN_WARNING "Symbol %s is marked as UNUSED, "
+		       "however this module is using it.\n", fsa->name);
+		printk(KERN_WARNING
+		       "This symbol will go away in the future.\n");
+		printk(KERN_WARNING
+		       "Please evalute if this is the right api to use and if "
+		       "it really is, submit a report the linux kernel "
+		       "mailinglist together with submitting your code for "
+		       "inclusion.\n");
+	}
+#endif
+
+	fsa->owner = owner;
+	fsa->crc = symversion(syms->crcs, symnum);
+	fsa->value = syms->start[symnum].value;
+	return true;
+}
+
+/* Find a symbol, return value, (optional) crc and (optional) module
+ * which owns it */
+static unsigned long find_symbol(const char *name,
+				 struct module **owner,
+				 const unsigned long **crc,
+				 bool gplok,
+				 bool warn)
+{
+	struct find_symbol_arg fsa;
+
+	fsa.name = name;
+	fsa.gplok = gplok;
+	fsa.warn = warn;
+
+	if (each_symbol(find_symbol_in_section, &fsa)) {
+		if (owner)
+			*owner = fsa.owner;
+		if (crc)
+			*crc = fsa.crc;
+		return fsa.value;
+	}
+
+	DEBUGP("Failed to find symbol %s\n", name);
+	return -ENOENT;
+}
+
+/* Search for module by name: must hold module_mutex. */
+static struct module *find_module(const char *name)
+{
+	struct module *mod;
+
+	list_for_each_entry(mod, &modules, list) {
+		if (strcmp(mod->name, name) == 0)
+			return mod;
+	}
+	return NULL;
+}
+
+#ifdef CONFIG_SMP
+/* Number of blocks used and allocated. */
+static unsigned int pcpu_num_used, pcpu_num_allocated;
+/* Size of each block.  -ve means used. */
+static int *pcpu_size;
+
+static int split_block(unsigned int i, unsigned short size)
+{
+	/* Reallocation required? */
+	if (pcpu_num_used + 1 > pcpu_num_allocated) {
+		int *new;
+
+		new = krealloc(pcpu_size, sizeof(new[0])*pcpu_num_allocated*2,
+			       GFP_KERNEL);
+		if (!new)
+			return 0;
+
+		pcpu_num_allocated *= 2;
+		pcpu_size = new;
+	}
+
+	/* Insert a new subblock */
+	memmove(&pcpu_size[i+1], &pcpu_size[i],
+		sizeof(pcpu_size[0]) * (pcpu_num_used - i));
+	pcpu_num_used++;
+
+	pcpu_size[i+1] -= size;
+	pcpu_size[i] = size;
+	return 1;
+}
+
+static inline unsigned int block_size(int val)
+{
+	if (val < 0)
+		return -val;
+	return val;
+}
+
+static void *percpu_modalloc(unsigned long size, unsigned long align,
+			     const char *name)
+{
+	unsigned long extra;
+	unsigned int i;
+	void *ptr;
+
+	if (align > PAGE_SIZE) {
+		printk(KERN_WARNING "%s: per-cpu alignment %li > %li\n",
+		       name, align, PAGE_SIZE);
+		align = PAGE_SIZE;
+	}
+
+	ptr = __per_cpu_start;
+	for (i = 0; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
+		/* Extra for alignment requirement. */
+		extra = ALIGN((unsigned long)ptr, align) - (unsigned long)ptr;
+		BUG_ON(i == 0 && extra != 0);
+
+		if (pcpu_size[i] < 0 || pcpu_size[i] < extra + size)
+			continue;
+
+		/* Transfer extra to previous block. */
+		if (pcpu_size[i-1] < 0)
+			pcpu_size[i-1] -= extra;
+		else
+			pcpu_size[i-1] += extra;
+		pcpu_size[i] -= extra;
+		ptr += extra;
+
+		/* Split block if warranted */
+		if (pcpu_size[i] - size > sizeof(unsigned long))
+			if (!split_block(i, size))
+				return NULL;
+
+		/* Mark allocated */
+		pcpu_size[i] = -pcpu_size[i];
+		return ptr;
+	}
+
+	printk(KERN_WARNING "Could not allocate %lu bytes percpu data\n",
+	       size);
+	return NULL;
+}
+
+static void percpu_modfree(void *freeme)
+{
+	unsigned int i;
+	void *ptr = __per_cpu_start + block_size(pcpu_size[0]);
+
+	/* First entry is core kernel percpu data. */
+	for (i = 1; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
+		if (ptr == freeme) {
+			pcpu_size[i] = -pcpu_size[i];
+			goto free;
+		}
+	}
+	BUG();
+
+ free:
+	/* Merge with previous? */
+	if (pcpu_size[i-1] >= 0) {
+		pcpu_size[i-1] += pcpu_size[i];
+		pcpu_num_used--;
+		memmove(&pcpu_size[i], &pcpu_size[i+1],
+			(pcpu_num_used - i) * sizeof(pcpu_size[0]));
+		i--;
+	}
+	/* Merge with next? */
+	if (i+1 < pcpu_num_used && pcpu_size[i+1] >= 0) {
+		pcpu_size[i] += pcpu_size[i+1];
+		pcpu_num_used--;
+		memmove(&pcpu_size[i+1], &pcpu_size[i+2],
+			(pcpu_num_used - (i+1)) * sizeof(pcpu_size[0]));
+	}
+}
+
+static unsigned int find_pcpusec(Elf_Ehdr *hdr,
+				 Elf_Shdr *sechdrs,
+				 const char *secstrings)
+{
+	return find_sec(hdr, sechdrs, secstrings, ".data.percpu");
+}
+
+static void percpu_modcopy(void *pcpudest, const void *from, unsigned long size)
+{
+	int cpu;
+
+	for_each_possible_cpu(cpu)
+		memcpy(pcpudest + per_cpu_offset(cpu), from, size);
+}
+
+static int percpu_modinit(void)
+{
+	pcpu_num_used = 2;
+	pcpu_num_allocated = 2;
+	pcpu_size = kmalloc(sizeof(pcpu_size[0]) * pcpu_num_allocated,
+			    GFP_KERNEL);
+	/* Static in-kernel percpu data (used). */
+	pcpu_size[0] = -(__per_cpu_end-__per_cpu_start);
+	/* Free room. */
+	pcpu_size[1] = PERCPU_ENOUGH_ROOM + pcpu_size[0];
+	if (pcpu_size[1] < 0) {
+		printk(KERN_ERR "No per-cpu room for modules.\n");
+		pcpu_num_used = 1;
+	}
+
+	return 0;
+}
+__initcall(percpu_modinit);
+#else /* ... !CONFIG_SMP */
+static inline void *percpu_modalloc(unsigned long size, unsigned long align,
+				    const char *name)
+{
+	return NULL;
+}
+static inline void percpu_modfree(void *pcpuptr)
+{
+	BUG();
+}
+static inline unsigned int find_pcpusec(Elf_Ehdr *hdr,
+					Elf_Shdr *sechdrs,
+					const char *secstrings)
+{
+	return 0;
+}
+static inline void percpu_modcopy(void *pcpudst, const void *src,
+				  unsigned long size)
+{
+	/* pcpusec should be 0, and size of that section should be 0. */
+	BUG_ON(size != 0);
+}
+#endif /* CONFIG_SMP */
+
+#define MODINFO_ATTR(field)	\
+static void setup_modinfo_##field(struct module *mod, const char *s)  \
+{                                                                     \
+	mod->field = kstrdup(s, GFP_KERNEL);                          \
+}                                                                     \
+static ssize_t show_modinfo_##field(struct module_attribute *mattr,   \
+	                struct module *mod, char *buffer)             \
+{                                                                     \
+	return sprintf(buffer, "%s\n", mod->field);                   \
+}                                                                     \
+static int modinfo_##field##_exists(struct module *mod)               \
+{                                                                     \
+	return mod->field != NULL;                                    \
+}                                                                     \
+static void free_modinfo_##field(struct module *mod)                  \
+{                                                                     \
+	kfree(mod->field);                                            \
+	mod->field = NULL;                                            \
+}                                                                     \
+static struct module_attribute modinfo_##field = {                    \
+	.attr = { .name = __stringify(field), .mode = 0444 },         \
+	.show = show_modinfo_##field,                                 \
+	.setup = setup_modinfo_##field,                               \
+	.test = modinfo_##field##_exists,                             \
+	.free = free_modinfo_##field,                                 \
+};
+
+MODINFO_ATTR(version);
+MODINFO_ATTR(srcversion);
+
+static char last_unloaded_module[MODULE_NAME_LEN+1];
+
+#ifdef CONFIG_MODULE_UNLOAD
+/* Init the unload section of the module. */
+static void module_unload_init(struct module *mod)
+{
+	unsigned int i;
+
+	INIT_LIST_HEAD(&mod->modules_which_use_me);
+	for (i = 0; i < NR_CPUS; i++)
+		local_set(&mod->ref[i].count, 0);
+	/* Hold reference count during initialization. */
+	local_set(&mod->ref[raw_smp_processor_id()].count, 1);
+	/* Backwards compatibility macros put refcount during init. */
+	mod->waiter = current;
+}
+
+/* modules using other modules */
+struct module_use
+{
+	struct list_head list;
+	struct module *module_which_uses;
+};
+
+/* Does a already use b? */
+static int already_uses(struct module *a, struct module *b)
+{
+	struct module_use *use;
+
+	list_for_each_entry(use, &b->modules_which_use_me, list) {
+		if (use->module_which_uses == a) {
+			DEBUGP("%s uses %s!\n", a->name, b->name);
+			return 1;
+		}
+	}
+	DEBUGP("%s does not use %s!\n", a->name, b->name);
+	return 0;
+}
+
+/* Module a uses b */
+static int use_module(struct module *a, struct module *b)
+{
+	struct module_use *use;
+	int no_warn, err;
+
+	if (b == NULL || already_uses(a, b)) return 1;
+
+	/* If we're interrupted or time out, we fail. */
+	if (wait_event_interruptible_timeout(
+		    module_wq, (err = strong_try_module_get(b)) != -EBUSY,
+		    30 * HZ) <= 0) {
+		printk("%s: gave up waiting for init of module %s.\n",
+		       a->name, b->name);
+		return 0;
+	}
+
+	/* If strong_try_module_get() returned a different error, we fail. */
+	if (err)
+		return 0;
+
+	DEBUGP("Allocating new usage for %s.\n", a->name);
+	use = kmalloc(sizeof(*use), GFP_ATOMIC);
+	if (!use) {
+		printk("%s: out of memory loading\n", a->name);
+		module_put(b);
+		return 0;
+	}
+
+	use->module_which_uses = a;
+	list_add(&use->list, &b->modules_which_use_me);
+	no_warn = sysfs_create_link(b->holders_dir, &a->mkobj.kobj, a->name);
+	return 1;
+}
+
+/* Clear the unload stuff of the module. */
+static void module_unload_free(struct module *mod)
+{
+	struct module *i;
+
+	list_for_each_entry(i, &modules, list) {
+		struct module_use *use;
+
+		list_for_each_entry(use, &i->modules_which_use_me, list) {
+			if (use->module_which_uses == mod) {
+				DEBUGP("%s unusing %s\n", mod->name, i->name);
+				module_put(i);
+				list_del(&use->list);
+				kfree(use);
+				sysfs_remove_link(i->holders_dir, mod->name);
+				/* There can be at most one match. */
+				break;
+			}
+		}
+	}
+}
+
+#ifdef CONFIG_MODULE_FORCE_UNLOAD
+static inline int try_force_unload(unsigned int flags)
+{
+	int ret = (flags & O_TRUNC);
+	if (ret)
+		add_taint(TAINT_FORCED_RMMOD);
+	return ret;
+}
+#else
+static inline int try_force_unload(unsigned int flags)
+{
+	return 0;
+}
+#endif /* CONFIG_MODULE_FORCE_UNLOAD */
+
+struct stopref
+{
+	struct module *mod;
+	int flags;
+	int *forced;
+};
+
+/* Whole machine is stopped with interrupts off when this runs. */
+static int __try_stop_module(void *_sref)
+{
+	struct stopref *sref = _sref;
+
+	/* If it's not unused, quit unless we're forcing. */
+	if (module_refcount(sref->mod) != 0) {
+		if (!(*sref->forced = try_force_unload(sref->flags)))
+			return -EWOULDBLOCK;
+	}
+
+	/* Mark it as dying. */
+	sref->mod->state = MODULE_STATE_GOING;
+	return 0;
+}
+
+static int try_stop_module(struct module *mod, int flags, int *forced)
+{
+	if (flags & O_NONBLOCK) {
+		struct stopref sref = { mod, flags, forced };
+
+		return stop_machine(__try_stop_module, &sref, NULL);
+	} else {
+		/* We don't need to stop the machine for this. */
+		mod->state = MODULE_STATE_GOING;
+		synchronize_sched();
+		return 0;
+	}
+}
+
+unsigned int module_refcount(struct module *mod)
+{
+	unsigned int i, total = 0;
+
+	for (i = 0; i < NR_CPUS; i++)
+		total += local_read(&mod->ref[i].count);
+	return total;
+}
+EXPORT_SYMBOL(module_refcount);
+
+/* This exists whether we can unload or not */
+static void free_module(struct module *mod);
+
+static void wait_for_zero_refcount(struct module *mod)
+{
+	/* Since we might sleep for some time, release the mutex first */
+	mutex_unlock(&module_mutex);
+	for (;;) {
+		DEBUGP("Looking at refcount...\n");
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		if (module_refcount(mod) == 0)
+			break;
+		schedule();
+	}
+	current->state = TASK_RUNNING;
+	mutex_lock(&module_mutex);
+}
+
+SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
+		unsigned int, flags)
+{
+	struct module *mod;
+	char name[MODULE_NAME_LEN];
+	int ret, forced = 0;
+
+	if (!capable(CAP_SYS_MODULE))
+		return -EPERM;
+
+	if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
+		return -EFAULT;
+	name[MODULE_NAME_LEN-1] = '\0';
+
+	if (mutex_lock_interruptible(&module_mutex) != 0)
+		return -EINTR;
+
+	mod = find_module(name);
+	if (!mod) {
+		ret = -ENOENT;
+		goto out;
+	}
+
+	if (!list_empty(&mod->modules_which_use_me)) {
+		/* Other modules depend on us: get rid of them first. */
+		ret = -EWOULDBLOCK;
+		goto out;
+	}
+
+	/* Doing init or already dying? */
+	if (mod->state != MODULE_STATE_LIVE) {
+		/* FIXME: if (force), slam module count and wake up
+                   waiter --RR */
+		DEBUGP("%s already dying\n", mod->name);
+		ret = -EBUSY;
+		goto out;
+	}
+
+	/* If it has an init func, it must have an exit func to unload */
+	if (mod->init && !mod->exit) {
+		forced = try_force_unload(flags);
+		if (!forced) {
+			/* This module can't be removed */
+			ret = -EBUSY;
+			goto out;
+		}
+	}
+
+	/* Set this up before setting mod->state */
+	mod->waiter = current;
+
+	/* Stop the machine so refcounts can't move and disable module. */
+	ret = try_stop_module(mod, flags, &forced);
+	if (ret != 0)
+		goto out;
+
+	/* Never wait if forced. */
+	if (!forced && module_refcount(mod) != 0)
+		wait_for_zero_refcount(mod);
+
+	mutex_unlock(&module_mutex);
+	/* Final destruction now noone is using it. */
+	if (mod->exit != NULL)
+		mod->exit();
+	blocking_notifier_call_chain(&module_notify_list,
+				     MODULE_STATE_GOING, mod);
+	mutex_lock(&module_mutex);
+	/* Store the name of the last unloaded module for diagnostic purposes */
+	strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
+	unregister_dynamic_debug_module(mod->name);
+	free_module(mod);
+
+ out:
+	mutex_unlock(&module_mutex);
+	return ret;
+}
+
+static void print_unload_info(struct seq_file *m, struct module *mod)
+{
+	struct module_use *use;
+	int printed_something = 0;
+
+	seq_printf(m, " %u ", module_refcount(mod));
+
+	/* Always include a trailing , so userspace can differentiate
+           between this and the old multi-field proc format. */
+	list_for_each_entry(use, &mod->modules_which_use_me, list) {
+		printed_something = 1;
+		seq_printf(m, "%s,", use->module_which_uses->name);
+	}
+
+	if (mod->init != NULL && mod->exit == NULL) {
+		printed_something = 1;
+		seq_printf(m, "[permanent],");
+	}
+
+	if (!printed_something)
+		seq_printf(m, "-");
+}
+
+void __symbol_put(const char *symbol)
+{
+	struct module *owner;
+
+	preempt_disable();
+	if (IS_ERR_VALUE(find_symbol(symbol, &owner, NULL, true, false)))
+		BUG();
+	module_put(owner);
+	preempt_enable();
+}
+EXPORT_SYMBOL(__symbol_put);
+
+void symbol_put_addr(void *addr)
+{
+	struct module *modaddr;
+
+	if (core_kernel_text((unsigned long)addr))
+		return;
+
+	if (!(modaddr = module_text_address((unsigned long)addr)))
+		BUG();
+	module_put(modaddr);
+}
+EXPORT_SYMBOL_GPL(symbol_put_addr);
+
+static ssize_t show_refcnt(struct module_attribute *mattr,
+			   struct module *mod, char *buffer)
+{
+	return sprintf(buffer, "%u\n", module_refcount(mod));
+}
+
+static struct module_attribute refcnt = {
+	.attr = { .name = "refcnt", .mode = 0444 },
+	.show = show_refcnt,
+};
+
+void module_put(struct module *module)
+{
+	if (module) {
+		unsigned int cpu = get_cpu();
+		local_dec(&module->ref[cpu].count);
+		/* Maybe they're waiting for us to drop reference? */
+		if (unlikely(!module_is_live(module)))
+			wake_up_process(module->waiter);
+		put_cpu();
+	}
+}
+EXPORT_SYMBOL(module_put);
+
+#else /* !CONFIG_MODULE_UNLOAD */
+static void print_unload_info(struct seq_file *m, struct module *mod)
+{
+	/* We don't know the usage count, or what modules are using. */
+	seq_printf(m, " - -");
+}
+
+static inline void module_unload_free(struct module *mod)
+{
+}
+
+static inline int use_module(struct module *a, struct module *b)
+{
+	return strong_try_module_get(b) == 0;
+}
+
+static inline void module_unload_init(struct module *mod)
+{
+}
+#endif /* CONFIG_MODULE_UNLOAD */
+
+static ssize_t show_initstate(struct module_attribute *mattr,
+			   struct module *mod, char *buffer)
+{
+	const char *state = "unknown";
+
+	switch (mod->state) {
+	case MODULE_STATE_LIVE:
+		state = "live";
+		break;
+	case MODULE_STATE_COMING:
+		state = "coming";
+		break;
+	case MODULE_STATE_GOING:
+		state = "going";
+		break;
+	}
+	return sprintf(buffer, "%s\n", state);
+}
+
+static struct module_attribute initstate = {
+	.attr = { .name = "initstate", .mode = 0444 },
+	.show = show_initstate,
+};
+
+static struct module_attribute *modinfo_attrs[] = {
+	&modinfo_version,
+	&modinfo_srcversion,
+	&initstate,
+#ifdef CONFIG_MODULE_UNLOAD
+	&refcnt,
+#endif
+	NULL,
+};
+
+static const char vermagic[] = VERMAGIC_STRING;
+
+static int try_to_force_load(struct module *mod, const char *symname)
+{
+#ifdef CONFIG_MODULE_FORCE_LOAD
+	if (!test_taint(TAINT_FORCED_MODULE))
+		printk("%s: no version for \"%s\" found: kernel tainted.\n",
+		       mod->name, symname);
+	add_taint_module(mod, TAINT_FORCED_MODULE);
+	return 0;
+#else
+	return -ENOEXEC;
+#endif
+}
+
+#ifdef CONFIG_MODVERSIONS
+static int check_version(Elf_Shdr *sechdrs,
+			 unsigned int versindex,
+			 const char *symname,
+			 struct module *mod, 
+			 const unsigned long *crc)
+{
+	unsigned int i, num_versions;
+	struct modversion_info *versions;
+
+	/* Exporting module didn't supply crcs?  OK, we're already tainted. */
+	if (!crc)
+		return 1;
+
+	/* No versions at all?  modprobe --force does this. */
+	if (versindex == 0)
+		return try_to_force_load(mod, symname) == 0;
+
+	versions = (void *) sechdrs[versindex].sh_addr;
+	num_versions = sechdrs[versindex].sh_size
+		/ sizeof(struct modversion_info);
+
+	for (i = 0; i < num_versions; i++) {
+		if (strcmp(versions[i].name, symname) != 0)
+			continue;
+
+		if (versions[i].crc == *crc)
+			return 1;
+		DEBUGP("Found checksum %lX vs module %lX\n",
+		       *crc, versions[i].crc);
+		goto bad_version;
+	}
+
+	printk(KERN_WARNING "%s: no symbol version for %s\n",
+	       mod->name, symname);
+	return 0;
+
+bad_version:
+	printk("%s: disagrees about version of symbol %s\n",
+	       mod->name, symname);
+	return 0;
+}
+
+static inline int check_modstruct_version(Elf_Shdr *sechdrs,
+					  unsigned int versindex,
+					  struct module *mod)
+{
+	const unsigned long *crc;
+
+	if (IS_ERR_VALUE(find_symbol("struct_module", NULL, &crc, true, false)))
+		BUG();
+	return check_version(sechdrs, versindex, "struct_module", mod, crc);
+}
+
+/* First part is kernel version, which we ignore if module has crcs. */
+static inline int same_magic(const char *amagic, const char *bmagic,
+			     bool has_crcs)
+{
+	if (has_crcs) {
+		amagic += strcspn(amagic, " ");
+		bmagic += strcspn(bmagic, " ");
+	}
+	return strcmp(amagic, bmagic) == 0;
+}
+#else
+static inline int check_version(Elf_Shdr *sechdrs,
+				unsigned int versindex,
+				const char *symname,
+				struct module *mod, 
+				const unsigned long *crc)
+{
+	return 1;
+}
+
+static inline int check_modstruct_version(Elf_Shdr *sechdrs,
+					  unsigned int versindex,
+					  struct module *mod)
+{
+	return 1;
+}
+
+static inline int same_magic(const char *amagic, const char *bmagic,
+			     bool has_crcs)
+{
+	return strcmp(amagic, bmagic) == 0;
+}
+#endif /* CONFIG_MODVERSIONS */
+
+/* Resolve a symbol for this module.  I.e. if we find one, record usage.
+   Must be holding module_mutex. */
+static unsigned long resolve_symbol(Elf_Shdr *sechdrs,
+				    unsigned int versindex,
+				    const char *name,
+				    struct module *mod)
+{
+	struct module *owner;
+	unsigned long ret;
+	const unsigned long *crc;
+
+	ret = find_symbol(name, &owner, &crc,
+			  !(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true);
+	if (!IS_ERR_VALUE(ret)) {
+		/* use_module can fail due to OOM,
+		   or module initialization or unloading */
+		if (!check_version(sechdrs, versindex, name, mod, crc) ||
+		    !use_module(mod, owner))
+			ret = -EINVAL;
+	}
+	return ret;
+}
+
+/*
+ * /sys/module/foo/sections stuff
+ * J. Corbet <corbet@lwn.net>
+ */
+#if defined(CONFIG_KALLSYMS) && defined(CONFIG_SYSFS)
+struct module_sect_attr
+{
+	struct module_attribute mattr;
+	char *name;
+	unsigned long address;
+};
+
+struct module_sect_attrs
+{
+	struct attribute_group grp;
+	unsigned int nsections;
+	struct module_sect_attr attrs[0];
+};
+
+static ssize_t module_sect_show(struct module_attribute *mattr,
+				struct module *mod, char *buf)
+{
+	struct module_sect_attr *sattr =
+		container_of(mattr, struct module_sect_attr, mattr);
+	return sprintf(buf, "0x%lx\n", sattr->address);
+}
+
+static void free_sect_attrs(struct module_sect_attrs *sect_attrs)
+{
+	unsigned int section;
+
+	for (section = 0; section < sect_attrs->nsections; section++)
+		kfree(sect_attrs->attrs[section].name);
+	kfree(sect_attrs);
+}
+
+static void add_sect_attrs(struct module *mod, unsigned int nsect,
+		char *secstrings, Elf_Shdr *sechdrs)
+{
+	unsigned int nloaded = 0, i, size[2];
+	struct module_sect_attrs *sect_attrs;
+	struct module_sect_attr *sattr;
+	struct attribute **gattr;
+
+	/* Count loaded sections and allocate structures */
+	for (i = 0; i < nsect; i++)
+		if (sechdrs[i].sh_flags & SHF_ALLOC)
+			nloaded++;
+	size[0] = ALIGN(sizeof(*sect_attrs)
+			+ nloaded * sizeof(sect_attrs->attrs[0]),
+			sizeof(sect_attrs->grp.attrs[0]));
+	size[1] = (nloaded + 1) * sizeof(sect_attrs->grp.attrs[0]);
+	sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL);
+	if (sect_attrs == NULL)
+		return;
+
+	/* Setup section attributes. */
+	sect_attrs->grp.name = "sections";
+	sect_attrs->grp.attrs = (void *)sect_attrs + size[0];
+
+	sect_attrs->nsections = 0;
+	sattr = &sect_attrs->attrs[0];
+	gattr = &sect_attrs->grp.attrs[0];
+	for (i = 0; i < nsect; i++) {
+		if (! (sechdrs[i].sh_flags & SHF_ALLOC))
+			continue;
+		sattr->address = sechdrs[i].sh_addr;
+		sattr->name = kstrdup(secstrings + sechdrs[i].sh_name,
+					GFP_KERNEL);
+		if (sattr->name == NULL)
+			goto out;
+		sect_attrs->nsections++;
+		sattr->mattr.show = module_sect_show;
+		sattr->mattr.store = NULL;
+		sattr->mattr.attr.name = sattr->name;
+		sattr->mattr.attr.mode = S_IRUGO;
+		*(gattr++) = &(sattr++)->mattr.attr;
+	}
+	*gattr = NULL;
+
+	if (sysfs_create_group(&mod->mkobj.kobj, &sect_attrs->grp))
+		goto out;
+
+	mod->sect_attrs = sect_attrs;
+	return;
+  out:
+	free_sect_attrs(sect_attrs);
+}
+
+static void remove_sect_attrs(struct module *mod)
+{
+	if (mod->sect_attrs) {
+		sysfs_remove_group(&mod->mkobj.kobj,
+				   &mod->sect_attrs->grp);
+		/* We are positive that no one is using any sect attrs
+		 * at this point.  Deallocate immediately. */
+		free_sect_attrs(mod->sect_attrs);
+		mod->sect_attrs = NULL;
+	}
+}
+
+/*
+ * /sys/module/foo/notes/.section.name gives contents of SHT_NOTE sections.
+ */
+
+struct module_notes_attrs {
+	struct kobject *dir;
+	unsigned int notes;
+	struct bin_attribute attrs[0];
+};
+
+static ssize_t module_notes_read(struct kobject *kobj,
+				 struct bin_attribute *bin_attr,
+				 char *buf, loff_t pos, size_t count)
+{
+	/*
+	 * The caller checked the pos and count against our size.
+	 */
+	memcpy(buf, bin_attr->private + pos, count);
+	return count;
+}
+
+static void free_notes_attrs(struct module_notes_attrs *notes_attrs,
+			     unsigned int i)
+{
+	if (notes_attrs->dir) {
+		while (i-- > 0)
+			sysfs_remove_bin_file(notes_attrs->dir,
+					      &notes_attrs->attrs[i]);
+		kobject_put(notes_attrs->dir);
+	}
+	kfree(notes_attrs);
+}
+
+static void add_notes_attrs(struct module *mod, unsigned int nsect,
+			    char *secstrings, Elf_Shdr *sechdrs)
+{
+	unsigned int notes, loaded, i;
+	struct module_notes_attrs *notes_attrs;
+	struct bin_attribute *nattr;
+
+	/* Count notes sections and allocate structures.  */
+	notes = 0;
+	for (i = 0; i < nsect; i++)
+		if ((sechdrs[i].sh_flags & SHF_ALLOC) &&
+		    (sechdrs[i].sh_type == SHT_NOTE))
+			++notes;
+
+	if (notes == 0)
+		return;
+
+	notes_attrs = kzalloc(sizeof(*notes_attrs)
+			      + notes * sizeof(notes_attrs->attrs[0]),
+			      GFP_KERNEL);
+	if (notes_attrs == NULL)
+		return;
+
+	notes_attrs->notes = notes;
+	nattr = &notes_attrs->attrs[0];
+	for (loaded = i = 0; i < nsect; ++i) {
+		if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+			continue;
+		if (sechdrs[i].sh_type == SHT_NOTE) {
+			nattr->attr.name = mod->sect_attrs->attrs[loaded].name;
+			nattr->attr.mode = S_IRUGO;
+			nattr->size = sechdrs[i].sh_size;
+			nattr->private = (void *) sechdrs[i].sh_addr;
+			nattr->read = module_notes_read;
+			++nattr;
+		}
+		++loaded;
+	}
+
+	notes_attrs->dir = kobject_create_and_add("notes", &mod->mkobj.kobj);
+	if (!notes_attrs->dir)
+		goto out;
+
+	for (i = 0; i < notes; ++i)
+		if (sysfs_create_bin_file(notes_attrs->dir,
+					  &notes_attrs->attrs[i]))
+			goto out;
+
+	mod->notes_attrs = notes_attrs;
+	return;
+
+  out:
+	free_notes_attrs(notes_attrs, i);
+}
+
+static void remove_notes_attrs(struct module *mod)
+{
+	if (mod->notes_attrs)
+		free_notes_attrs(mod->notes_attrs, mod->notes_attrs->notes);
+}
+
+#else
+
+static inline void add_sect_attrs(struct module *mod, unsigned int nsect,
+		char *sectstrings, Elf_Shdr *sechdrs)
+{
+}
+
+static inline void remove_sect_attrs(struct module *mod)
+{
+}
+
+static inline void add_notes_attrs(struct module *mod, unsigned int nsect,
+				   char *sectstrings, Elf_Shdr *sechdrs)
+{
+}
+
+static inline void remove_notes_attrs(struct module *mod)
+{
+}
+#endif
+
+#ifdef CONFIG_SYSFS
+int module_add_modinfo_attrs(struct module *mod)
+{
+	struct module_attribute *attr;
+	struct module_attribute *temp_attr;
+	int error = 0;
+	int i;
+
+	mod->modinfo_attrs = kzalloc((sizeof(struct module_attribute) *
+					(ARRAY_SIZE(modinfo_attrs) + 1)),
+					GFP_KERNEL);
+	if (!mod->modinfo_attrs)
+		return -ENOMEM;
+
+	temp_attr = mod->modinfo_attrs;
+	for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) {
+		if (!attr->test ||
+		    (attr->test && attr->test(mod))) {
+			memcpy(temp_attr, attr, sizeof(*temp_attr));
+			error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr);
+			++temp_attr;
+		}
+	}
+	return error;
+}
+
+void module_remove_modinfo_attrs(struct module *mod)
+{
+	struct module_attribute *attr;
+	int i;
+
+	for (i = 0; (attr = &mod->modinfo_attrs[i]); i++) {
+		/* pick a field to test for end of list */
+		if (!attr->attr.name)
+			break;
+		sysfs_remove_file(&mod->mkobj.kobj,&attr->attr);
+		if (attr->free)
+			attr->free(mod);
+	}
+	kfree(mod->modinfo_attrs);
+}
+
+int mod_sysfs_init(struct module *mod)
+{
+	int err;
+	struct kobject *kobj;
+
+	if (!module_sysfs_initialized) {
+		printk(KERN_ERR "%s: module sysfs not initialized\n",
+		       mod->name);
+		err = -EINVAL;
+		goto out;
+	}
+
+	kobj = kset_find_obj(module_kset, mod->name);
+	if (kobj) {
+		printk(KERN_ERR "%s: module is already loaded\n", mod->name);
+		kobject_put(kobj);
+		err = -EINVAL;
+		goto out;
+	}
+
+	mod->mkobj.mod = mod;
+
+	memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj));
+	mod->mkobj.kobj.kset = module_kset;
+	err = kobject_init_and_add(&mod->mkobj.kobj, &module_ktype, NULL,
+				   "%s", mod->name);
+	if (err)
+		kobject_put(&mod->mkobj.kobj);
+
+	/* delay uevent until full sysfs population */
+out:
+	return err;
+}
+
+int mod_sysfs_setup(struct module *mod,
+			   struct kernel_param *kparam,
+			   unsigned int num_params)
+{
+	int err;
+
+	mod->holders_dir = kobject_create_and_add("holders", &mod->mkobj.kobj);
+	if (!mod->holders_dir) {
+		err = -ENOMEM;
+		goto out_unreg;
+	}
+
+	err = module_param_sysfs_setup(mod, kparam, num_params);
+	if (err)
+		goto out_unreg_holders;
+
+	err = module_add_modinfo_attrs(mod);
+	if (err)
+		goto out_unreg_param;
+
+	kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD);
+	return 0;
+
+out_unreg_param:
+	module_param_sysfs_remove(mod);
+out_unreg_holders:
+	kobject_put(mod->holders_dir);
+out_unreg:
+	kobject_put(&mod->mkobj.kobj);
+	return err;
+}
+
+static void mod_sysfs_fini(struct module *mod)
+{
+	kobject_put(&mod->mkobj.kobj);
+}
+
+#else /* CONFIG_SYSFS */
+
+static void mod_sysfs_fini(struct module *mod)
+{
+}
+
+#endif /* CONFIG_SYSFS */
+
+static void mod_kobject_remove(struct module *mod)
+{
+	module_remove_modinfo_attrs(mod);
+	module_param_sysfs_remove(mod);
+	kobject_put(mod->mkobj.drivers_dir);
+	kobject_put(mod->holders_dir);
+	mod_sysfs_fini(mod);
+}
+
+/*
+ * unlink the module with the whole machine is stopped with interrupts off
+ * - this defends against kallsyms not taking locks
+ */
+static int __unlink_module(void *_mod)
+{
+	struct module *mod = _mod;
+	list_del(&mod->list);
+	return 0;
+}
+
+/* Free a module, remove from lists, etc (must hold module_mutex). */
+static void free_module(struct module *mod)
+{
+	/* Delete from various lists */
+	stop_machine(__unlink_module, mod, NULL);
+	remove_notes_attrs(mod);
+	remove_sect_attrs(mod);
+	mod_kobject_remove(mod);
+
+	unwind_remove_table(mod->unwind_info, 0);
+
+	/* Arch-specific cleanup. */
+	module_arch_cleanup(mod);
+
+	/* Module unload stuff */
+	module_unload_free(mod);
+
+	/* release any pointers to mcount in this module */
+	ftrace_release(mod->module_core, mod->core_size);
+
+	/* This may be NULL, but that's OK */
+	module_free(mod, mod->module_init);
+	kfree(mod->args);
+	if (mod->percpu)
+		percpu_modfree(mod->percpu);
+
+	/* Free lock-classes: */
+	lockdep_free_key_range(mod->module_core, mod->core_size);
+
+	/* Finally, free the core (containing the module structure) */
+	module_free(mod, mod->module_core);
+}
+
+void *__symbol_get(const char *symbol)
+{
+	struct module *owner;
+	unsigned long value;
+
+	preempt_disable();
+	value = find_symbol(symbol, &owner, NULL, true, true);
+	if (IS_ERR_VALUE(value))
+		value = 0;
+	else if (strong_try_module_get(owner))
+		value = 0;
+	preempt_enable();
+
+	return (void *)value;
+}
+EXPORT_SYMBOL_GPL(__symbol_get);
+
+/*
+ * Ensure that an exported symbol [global namespace] does not already exist
+ * in the kernel or in some other module's exported symbol table.
+ */
+static int verify_export_symbols(struct module *mod)
+{
+	unsigned int i;
+	struct module *owner;
+	const struct kernel_symbol *s;
+	struct {
+		const struct kernel_symbol *sym;
+		unsigned int num;
+	} arr[] = {
+		{ mod->syms, mod->num_syms },
+		{ mod->gpl_syms, mod->num_gpl_syms },
+		{ mod->gpl_future_syms, mod->num_gpl_future_syms },
+#ifdef CONFIG_UNUSED_SYMBOLS
+		{ mod->unused_syms, mod->num_unused_syms },
+		{ mod->unused_gpl_syms, mod->num_unused_gpl_syms },
+#endif
+	};
+
+	for (i = 0; i < ARRAY_SIZE(arr); i++) {
+		for (s = arr[i].sym; s < arr[i].sym + arr[i].num; s++) {
+			if (!IS_ERR_VALUE(find_symbol(s->name, &owner,
+						      NULL, true, false))) {
+				printk(KERN_ERR
+				       "%s: exports duplicate symbol %s"
+				       " (owned by %s)\n",
+				       mod->name, s->name, module_name(owner));
+				return -ENOEXEC;
+			}
+		}
+	}
+	return 0;
+}
+
+/* Change all symbols so that st_value encodes the pointer directly. */
+static int simplify_symbols(Elf_Shdr *sechdrs,
+			    unsigned int symindex,
+			    const char *strtab,
+			    unsigned int versindex,
+			    unsigned int pcpuindex,
+			    struct module *mod)
+{
+	Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr;
+	unsigned long secbase;
+	unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
+	int ret = 0;
+
+	for (i = 1; i < n; i++) {
+		switch (sym[i].st_shndx) {
+		case SHN_COMMON:
+			/* We compiled with -fno-common.  These are not
+			   supposed to happen.  */
+			DEBUGP("Common symbol: %s\n", strtab + sym[i].st_name);
+			printk("%s: please compile with -fno-common\n",
+			       mod->name);
+			ret = -ENOEXEC;
+			break;
+
+		case SHN_ABS:
+			/* Don't need to do anything */
+			DEBUGP("Absolute symbol: 0x%08lx\n",
+			       (long)sym[i].st_value);
+			break;
+
+		case SHN_UNDEF:
+			sym[i].st_value
+			  = resolve_symbol(sechdrs, versindex,
+					   strtab + sym[i].st_name, mod);
+
+			/* Ok if resolved.  */
+			if (!IS_ERR_VALUE(sym[i].st_value))
+				break;
+			/* Ok if weak.  */
+			if (ELF_ST_BIND(sym[i].st_info) == STB_WEAK)
+				break;
+
+			printk(KERN_WARNING "%s: Unknown symbol %s\n",
+			       mod->name, strtab + sym[i].st_name);
+			ret = -ENOENT;
+			break;
+
+		default:
+			/* Divert to percpu allocation if a percpu var. */
+			if (sym[i].st_shndx == pcpuindex)
+				secbase = (unsigned long)mod->percpu;
+			else
+				secbase = sechdrs[sym[i].st_shndx].sh_addr;
+			sym[i].st_value += secbase;
+			break;
+		}
+	}
+
+	return ret;
+}
+
+/* Update size with this section: return offset. */
+static long get_offset(unsigned int *size, Elf_Shdr *sechdr)
+{
+	long ret;
+
+	ret = ALIGN(*size, sechdr->sh_addralign ?: 1);
+	*size = ret + sechdr->sh_size;
+	return ret;
+}
+
+/* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld
+   might -- code, read-only data, read-write data, small data.  Tally
+   sizes, and place the offsets into sh_entsize fields: high bit means it
+   belongs in init. */
+static void layout_sections(struct module *mod,
+			    const Elf_Ehdr *hdr,
+			    Elf_Shdr *sechdrs,
+			    const char *secstrings)
+{
+	static unsigned long const masks[][2] = {
+		/* NOTE: all executable code must be the first section
+		 * in this array; otherwise modify the text_size
+		 * finder in the two loops below */
+		{ SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL },
+		{ SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL },
+		{ SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL },
+		{ ARCH_SHF_SMALL | SHF_ALLOC, 0 }
+	};
+	unsigned int m, i;
+
+	for (i = 0; i < hdr->e_shnum; i++)
+		sechdrs[i].sh_entsize = ~0UL;
+
+	DEBUGP("Core section allocation order:\n");
+	for (m = 0; m < ARRAY_SIZE(masks); ++m) {
+		for (i = 0; i < hdr->e_shnum; ++i) {
+			Elf_Shdr *s = &sechdrs[i];
+
+			if ((s->sh_flags & masks[m][0]) != masks[m][0]
+			    || (s->sh_flags & masks[m][1])
+			    || s->sh_entsize != ~0UL
+			    || strncmp(secstrings + s->sh_name,
+				       ".init", 5) == 0)
+				continue;
+			s->sh_entsize = get_offset(&mod->core_size, s);
+			DEBUGP("\t%s\n", secstrings + s->sh_name);
+		}
+		if (m == 0)
+			mod->core_text_size = mod->core_size;
+	}
+
+	DEBUGP("Init section allocation order:\n");
+	for (m = 0; m < ARRAY_SIZE(masks); ++m) {
+		for (i = 0; i < hdr->e_shnum; ++i) {
+			Elf_Shdr *s = &sechdrs[i];
+
+			if ((s->sh_flags & masks[m][0]) != masks[m][0]
+			    || (s->sh_flags & masks[m][1])
+			    || s->sh_entsize != ~0UL
+			    || strncmp(secstrings + s->sh_name,
+				       ".init", 5) != 0)
+				continue;
+			s->sh_entsize = (get_offset(&mod->init_size, s)
+					 | INIT_OFFSET_MASK);
+			DEBUGP("\t%s\n", secstrings + s->sh_name);
+		}
+		if (m == 0)
+			mod->init_text_size = mod->init_size;
+	}
+}
+
+static void set_license(struct module *mod, const char *license)
+{
+	if (!license)
+		license = "unspecified";
+
+	if (!license_is_gpl_compatible(license)) {
+		if (!test_taint(TAINT_PROPRIETARY_MODULE))
+			printk(KERN_WARNING "%s: module license '%s' taints "
+				"kernel.\n", mod->name, license);
+		add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
+	}
+}
+
+/* Parse tag=value strings from .modinfo section */
+static char *next_string(char *string, unsigned long *secsize)
+{
+	/* Skip non-zero chars */
+	while (string[0]) {
+		string++;
+		if ((*secsize)-- <= 1)
+			return NULL;
+	}
+
+	/* Skip any zero padding. */
+	while (!string[0]) {
+		string++;
+		if ((*secsize)-- <= 1)
+			return NULL;
+	}
+	return string;
+}
+
+static char *get_modinfo(Elf_Shdr *sechdrs,
+			 unsigned int info,
+			 const char *tag)
+{
+	char *p;
+	unsigned int taglen = strlen(tag);
+	unsigned long size = sechdrs[info].sh_size;
+
+	for (p = (char *)sechdrs[info].sh_addr; p; p = next_string(p, &size)) {
+		if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=')
+			return p + taglen + 1;
+	}
+	return NULL;
+}
+
+static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs,
+			  unsigned int infoindex)
+{
+	struct module_attribute *attr;
+	int i;
+
+	for (i = 0; (attr = modinfo_attrs[i]); i++) {
+		if (attr->setup)
+			attr->setup(mod,
+				    get_modinfo(sechdrs,
+						infoindex,
+						attr->attr.name));
+	}
+}
+
+#ifdef CONFIG_KALLSYMS
+
+/* lookup symbol in given range of kernel_symbols */
+static const struct kernel_symbol *lookup_symbol(const char *name,
+	const struct kernel_symbol *start,
+	const struct kernel_symbol *stop)
+{
+	const struct kernel_symbol *ks = start;
+	for (; ks < stop; ks++)
+		if (strcmp(ks->name, name) == 0)
+			return ks;
+	return NULL;
+}
+
+static int is_exported(const char *name, const struct module *mod)
+{
+	if (!mod && lookup_symbol(name, __start___ksymtab, __stop___ksymtab))
+		return 1;
+	else
+		if (mod && lookup_symbol(name, mod->syms, mod->syms + mod->num_syms))
+			return 1;
+		else
+			return 0;
+}
+
+/* As per nm */
+static char elf_type(const Elf_Sym *sym,
+		     Elf_Shdr *sechdrs,
+		     const char *secstrings,
+		     struct module *mod)
+{
+	if (ELF_ST_BIND(sym->st_info) == STB_WEAK) {
+		if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT)
+			return 'v';
+		else
+			return 'w';
+	}
+	if (sym->st_shndx == SHN_UNDEF)
+		return 'U';
+	if (sym->st_shndx == SHN_ABS)
+		return 'a';
+	if (sym->st_shndx >= SHN_LORESERVE)
+		return '?';
+	if (sechdrs[sym->st_shndx].sh_flags & SHF_EXECINSTR)
+		return 't';
+	if (sechdrs[sym->st_shndx].sh_flags & SHF_ALLOC
+	    && sechdrs[sym->st_shndx].sh_type != SHT_NOBITS) {
+		if (!(sechdrs[sym->st_shndx].sh_flags & SHF_WRITE))
+			return 'r';
+		else if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL)
+			return 'g';
+		else
+			return 'd';
+	}
+	if (sechdrs[sym->st_shndx].sh_type == SHT_NOBITS) {
+		if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL)
+			return 's';
+		else
+			return 'b';
+	}
+	if (strncmp(secstrings + sechdrs[sym->st_shndx].sh_name,
+		    ".debug", strlen(".debug")) == 0)
+		return 'n';
+	return '?';
+}
+
+static void add_kallsyms(struct module *mod,
+			 Elf_Shdr *sechdrs,
+			 unsigned int symindex,
+			 unsigned int strindex,
+			 const char *secstrings)
+{
+	unsigned int i;
+
+	mod->symtab = (void *)sechdrs[symindex].sh_addr;
+	mod->num_symtab = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
+	mod->strtab = (void *)sechdrs[strindex].sh_addr;
+
+	/* Set types up while we still have access to sections. */
+	for (i = 0; i < mod->num_symtab; i++)
+		mod->symtab[i].st_info
+			= elf_type(&mod->symtab[i], sechdrs, secstrings, mod);
+}
+#else
+static inline void add_kallsyms(struct module *mod,
+				Elf_Shdr *sechdrs,
+				unsigned int symindex,
+				unsigned int strindex,
+				const char *secstrings)
+{
+}
+#endif /* CONFIG_KALLSYMS */
+
+static void dynamic_printk_setup(struct mod_debug *debug, unsigned int num)
+{
+#ifdef CONFIG_DYNAMIC_PRINTK_DEBUG
+	unsigned int i;
+
+	for (i = 0; i < num; i++) {
+		register_dynamic_debug_module(debug[i].modname,
+					      debug[i].type,
+					      debug[i].logical_modname,
+					      debug[i].flag_names,
+					      debug[i].hash, debug[i].hash2);
+	}
+#endif /* CONFIG_DYNAMIC_PRINTK_DEBUG */
+}
+
+static void *module_alloc_update_bounds(unsigned long size)
+{
+	void *ret = module_alloc(size);
+
+	if (ret) {
+		/* Update module bounds. */
+		if ((unsigned long)ret < module_addr_min)
+			module_addr_min = (unsigned long)ret;
+		if ((unsigned long)ret + size > module_addr_max)
+			module_addr_max = (unsigned long)ret + size;
+	}
+	return ret;
+}
+
+/* Allocate and load the module: note that size of section 0 is always
+   zero, and we rely on this for optional sections. */
+static noinline struct module *load_module(void __user *umod,
+				  unsigned long len,
+				  const char __user *uargs)
+{
+	Elf_Ehdr *hdr;
+	Elf_Shdr *sechdrs;
+	char *secstrings, *args, *modmagic, *strtab = NULL;
+	char *staging;
+	unsigned int i;
+	unsigned int symindex = 0;
+	unsigned int strindex = 0;
+	unsigned int modindex, versindex, infoindex, pcpuindex;
+	unsigned int unwindex = 0;
+	unsigned int num_kp, num_mcount;
+	struct kernel_param *kp;
+	struct module *mod;
+	long err = 0;
+	void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
+	unsigned long *mseg;
+	mm_segment_t old_fs;
+
+	DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n",
+	       umod, len, uargs);
+	if (len < sizeof(*hdr))
+		return ERR_PTR(-ENOEXEC);
+
+	/* Suck in entire file: we'll want most of it. */
+	/* vmalloc barfs on "unusual" numbers.  Check here */
+	if (len > 64 * 1024 * 1024 || (hdr = vmalloc(len)) == NULL)
+		return ERR_PTR(-ENOMEM);
+	if (copy_from_user(hdr, umod, len) != 0) {
+		err = -EFAULT;
+		goto free_hdr;
+	}
+
+	/* Sanity checks against insmoding binaries or wrong arch,
+           weird elf version */
+	if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0
+	    || hdr->e_type != ET_REL
+	    || !elf_check_arch(hdr)
+	    || hdr->e_shentsize != sizeof(*sechdrs)) {
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+
+	if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr))
+		goto truncated;
+
+	/* Convenience variables */
+	sechdrs = (void *)hdr + hdr->e_shoff;
+	secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+	sechdrs[0].sh_addr = 0;
+
+	for (i = 1; i < hdr->e_shnum; i++) {
+		if (sechdrs[i].sh_type != SHT_NOBITS
+		    && len < sechdrs[i].sh_offset + sechdrs[i].sh_size)
+			goto truncated;
+
+		/* Mark all sections sh_addr with their address in the
+		   temporary image. */
+		sechdrs[i].sh_addr = (size_t)hdr + sechdrs[i].sh_offset;
+
+		/* Internal symbols and strings. */
+		if (sechdrs[i].sh_type == SHT_SYMTAB) {
+			symindex = i;
+			strindex = sechdrs[i].sh_link;
+			strtab = (char *)hdr + sechdrs[strindex].sh_offset;
+		}
+#ifndef CONFIG_MODULE_UNLOAD
+		/* Don't load .exit sections */
+		if (strncmp(secstrings+sechdrs[i].sh_name, ".exit", 5) == 0)
+			sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;
+#endif
+	}
+
+	modindex = find_sec(hdr, sechdrs, secstrings,
+			    ".gnu.linkonce.this_module");
+	if (!modindex) {
+		printk(KERN_WARNING "No module found in object\n");
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+	/* This is temporary: point mod into copy of data. */
+	mod = (void *)sechdrs[modindex].sh_addr;
+
+	if (symindex == 0) {
+		printk(KERN_WARNING "%s: module has no symbols (stripped?)\n",
+		       mod->name);
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+
+	versindex = find_sec(hdr, sechdrs, secstrings, "__versions");
+	infoindex = find_sec(hdr, sechdrs, secstrings, ".modinfo");
+	pcpuindex = find_pcpusec(hdr, sechdrs, secstrings);
+#ifdef ARCH_UNWIND_SECTION_NAME
+	unwindex = find_sec(hdr, sechdrs, secstrings, ARCH_UNWIND_SECTION_NAME);
+#endif
+
+	/* Don't keep modinfo and version sections. */
+	sechdrs[infoindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
+	sechdrs[versindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
+#ifdef CONFIG_KALLSYMS
+	/* Keep symbol and string tables for decoding later. */
+	sechdrs[symindex].sh_flags |= SHF_ALLOC;
+	sechdrs[strindex].sh_flags |= SHF_ALLOC;
+#endif
+	if (unwindex)
+		sechdrs[unwindex].sh_flags |= SHF_ALLOC;
+
+	/* Check module struct version now, before we try to use module. */
+	if (!check_modstruct_version(sechdrs, versindex, mod)) {
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+
+	modmagic = get_modinfo(sechdrs, infoindex, "vermagic");
+	/* This is allowed: modprobe --force will invalidate it. */
+	if (!modmagic) {
+		err = try_to_force_load(mod, "magic");
+		if (err)
+			goto free_hdr;
+	} else if (!same_magic(modmagic, vermagic, versindex)) {
+		printk(KERN_ERR "%s: version magic '%s' should be '%s'\n",
+		       mod->name, modmagic, vermagic);
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+
+	staging = get_modinfo(sechdrs, infoindex, "staging");
+	if (staging) {
+		add_taint_module(mod, TAINT_CRAP);
+		printk(KERN_WARNING "%s: module is from the staging directory,"
+		       " the quality is unknown, you have been warned.\n",
+		       mod->name);
+	}
+
+	/* Now copy in args */
+	args = strndup_user(uargs, ~0UL >> 1);
+	if (IS_ERR(args)) {
+		err = PTR_ERR(args);
+		goto free_hdr;
+	}
+
+	if (find_module(mod->name)) {
+		err = -EEXIST;
+		goto free_mod;
+	}
+
+	mod->state = MODULE_STATE_COMING;
+
+	/* Allow arches to frob section contents and sizes.  */
+	err = module_frob_arch_sections(hdr, sechdrs, secstrings, mod);
+	if (err < 0)
+		goto free_mod;
+
+	if (pcpuindex) {
+		/* We have a special allocation for this section. */
+		percpu = percpu_modalloc(sechdrs[pcpuindex].sh_size,
+					 sechdrs[pcpuindex].sh_addralign,
+					 mod->name);
+		if (!percpu) {
+			err = -ENOMEM;
+			goto free_mod;
+		}
+		sechdrs[pcpuindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
+		mod->percpu = percpu;
+	}
+
+	/* Determine total sizes, and put offsets in sh_entsize.  For now
+	   this is done generically; there doesn't appear to be any
+	   special cases for the architectures. */
+	layout_sections(mod, hdr, sechdrs, secstrings);
+
+	/* Do the allocs. */
+	ptr = module_alloc_update_bounds(mod->core_size);
+	if (!ptr) {
+		err = -ENOMEM;
+		goto free_percpu;
+	}
+	memset(ptr, 0, mod->core_size);
+	mod->module_core = ptr;
+
+	ptr = module_alloc_update_bounds(mod->init_size);
+	if (!ptr && mod->init_size) {
+		err = -ENOMEM;
+		goto free_core;
+	}
+	memset(ptr, 0, mod->init_size);
+	mod->module_init = ptr;
+
+	/* Transfer each section which specifies SHF_ALLOC */
+	DEBUGP("final section addresses:\n");
+	for (i = 0; i < hdr->e_shnum; i++) {
+		void *dest;
+
+		if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+			continue;
+
+		if (sechdrs[i].sh_entsize & INIT_OFFSET_MASK)
+			dest = mod->module_init
+				+ (sechdrs[i].sh_entsize & ~INIT_OFFSET_MASK);
+		else
+			dest = mod->module_core + sechdrs[i].sh_entsize;
+
+		if (sechdrs[i].sh_type != SHT_NOBITS)
+			memcpy(dest, (void *)sechdrs[i].sh_addr,
+			       sechdrs[i].sh_size);
+		/* Update sh_addr to point to copy in image. */
+		sechdrs[i].sh_addr = (unsigned long)dest;
+		DEBUGP("\t0x%lx %s\n", sechdrs[i].sh_addr, secstrings + sechdrs[i].sh_name);
+	}
+	/* Module has been moved. */
+	mod = (void *)sechdrs[modindex].sh_addr;
+
+	/* Now we've moved module, initialize linked lists, etc. */
+	module_unload_init(mod);
+
+	/* add kobject, so we can reference it. */
+	err = mod_sysfs_init(mod);
+	if (err)
+		goto free_unload;
+
+	/* Set up license info based on the info section */
+	set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
+
+	/*
+	 * ndiswrapper is under GPL by itself, but loads proprietary modules.
+	 * Don't use add_taint_module(), as it would prevent ndiswrapper from
+	 * using GPL-only symbols it needs.
+	 */
+	if (strcmp(mod->name, "ndiswrapper") == 0)
+		add_taint(TAINT_PROPRIETARY_MODULE);
+
+	/* driverloader was caught wrongly pretending to be under GPL */
+	if (strcmp(mod->name, "driverloader") == 0)
+		add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
+
+	/* Set up MODINFO_ATTR fields */
+	setup_modinfo(mod, sechdrs, infoindex);
+
+	/* Fix up syms, so that st_value is a pointer to location. */
+	err = simplify_symbols(sechdrs, symindex, strtab, versindex, pcpuindex,
+			       mod);
+	if (err < 0)
+		goto cleanup;
+
+	/* Now we've got everything in the final locations, we can
+	 * find optional sections. */
+	kp = section_objs(hdr, sechdrs, secstrings, "__param", sizeof(*kp),
+			  &num_kp);
+	mod->syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab",
+				 sizeof(*mod->syms), &mod->num_syms);
+	mod->crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab");
+	mod->gpl_syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab_gpl",
+				     sizeof(*mod->gpl_syms),
+				     &mod->num_gpl_syms);
+	mod->gpl_crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab_gpl");
+	mod->gpl_future_syms = section_objs(hdr, sechdrs, secstrings,
+					    "__ksymtab_gpl_future",
+					    sizeof(*mod->gpl_future_syms),
+					    &mod->num_gpl_future_syms);
+	mod->gpl_future_crcs = section_addr(hdr, sechdrs, secstrings,
+					    "__kcrctab_gpl_future");
+
+#ifdef CONFIG_UNUSED_SYMBOLS
+	mod->unused_syms = section_objs(hdr, sechdrs, secstrings,
+					"__ksymtab_unused",
+					sizeof(*mod->unused_syms),
+					&mod->num_unused_syms);
+	mod->unused_crcs = section_addr(hdr, sechdrs, secstrings,
+					"__kcrctab_unused");
+	mod->unused_gpl_syms = section_objs(hdr, sechdrs, secstrings,
+					    "__ksymtab_unused_gpl",
+					    sizeof(*mod->unused_gpl_syms),
+					    &mod->num_unused_gpl_syms);
+	mod->unused_gpl_crcs = section_addr(hdr, sechdrs, secstrings,
+					    "__kcrctab_unused_gpl");
+#endif
+
+#ifdef CONFIG_MARKERS
+	mod->markers = section_objs(hdr, sechdrs, secstrings, "__markers",
+				    sizeof(*mod->markers), &mod->num_markers);
+#endif
+#ifdef CONFIG_TRACEPOINTS
+	mod->tracepoints = section_objs(hdr, sechdrs, secstrings,
+					"__tracepoints",
+					sizeof(*mod->tracepoints),
+					&mod->num_tracepoints);
+#endif
+
+#ifdef CONFIG_MODVERSIONS
+	if ((mod->num_syms && !mod->crcs)
+	    || (mod->num_gpl_syms && !mod->gpl_crcs)
+	    || (mod->num_gpl_future_syms && !mod->gpl_future_crcs)
+#ifdef CONFIG_UNUSED_SYMBOLS
+	    || (mod->num_unused_syms && !mod->unused_crcs)
+	    || (mod->num_unused_gpl_syms && !mod->unused_gpl_crcs)
+#endif
+		) {
+		printk(KERN_WARNING "%s: No versions for exported symbols.\n", mod->name);
+		err = try_to_force_load(mod, "nocrc");
+		if (err)
+			goto cleanup;
+	}
+#endif
+
+	/* Now do relocations. */
+	for (i = 1; i < hdr->e_shnum; i++) {
+		const char *strtab = (char *)sechdrs[strindex].sh_addr;
+		unsigned int info = sechdrs[i].sh_info;
+
+		/* Not a valid relocation section? */
+		if (info >= hdr->e_shnum)
+			continue;
+
+		/* Don't bother with non-allocated sections */
+		if (!(sechdrs[info].sh_flags & SHF_ALLOC))
+			continue;
+
+		if (sechdrs[i].sh_type == SHT_REL)
+			err = apply_relocate(sechdrs, strtab, symindex, i,mod);
+		else if (sechdrs[i].sh_type == SHT_RELA)
+			err = apply_relocate_add(sechdrs, strtab, symindex, i,
+						 mod);
+		if (err < 0)
+			goto cleanup;
+	}
+
+        /* Find duplicate symbols */
+	err = verify_export_symbols(mod);
+	if (err < 0)
+		goto cleanup;
+
+  	/* Set up and sort exception table */
+	mod->extable = section_objs(hdr, sechdrs, secstrings, "__ex_table",
+				    sizeof(*mod->extable), &mod->num_exentries);
+	sort_extable(mod->extable, mod->extable + mod->num_exentries);
+
+	/* Finally, copy percpu area over. */
+	percpu_modcopy(mod->percpu, (void *)sechdrs[pcpuindex].sh_addr,
+		       sechdrs[pcpuindex].sh_size);
+
+	add_kallsyms(mod, sechdrs, symindex, strindex, secstrings);
+
+	if (!mod->taints) {
+		struct mod_debug *debug;
+		unsigned int num_debug;
+
+#ifdef CONFIG_MARKERS
+		marker_update_probe_range(mod->markers,
+			mod->markers + mod->num_markers);
+#endif
+		debug = section_objs(hdr, sechdrs, secstrings, "__verbose",
+				     sizeof(*debug), &num_debug);
+		dynamic_printk_setup(debug, num_debug);
+
+#ifdef CONFIG_TRACEPOINTS
+		tracepoint_update_probe_range(mod->tracepoints,
+			mod->tracepoints + mod->num_tracepoints);
+#endif
+	}
+
+	/* sechdrs[0].sh_size is always zero */
+	mseg = section_objs(hdr, sechdrs, secstrings, "__mcount_loc",
+			    sizeof(*mseg), &num_mcount);
+	ftrace_init_module(mseg, mseg + num_mcount);
+
+	err = module_finalize(hdr, sechdrs, mod);
+	if (err < 0)
+		goto cleanup;
+
+	/* flush the icache in correct context */
+	old_fs = get_fs();
+	set_fs(KERNEL_DS);
+
+	/*
+	 * Flush the instruction cache, since we've played with text.
+	 * Do it before processing of module parameters, so the module
+	 * can provide parameter accessor functions of its own.
+	 */
+	if (mod->module_init)
+		flush_icache_range((unsigned long)mod->module_init,
+				   (unsigned long)mod->module_init
+				   + mod->init_size);
+	flush_icache_range((unsigned long)mod->module_core,
+			   (unsigned long)mod->module_core + mod->core_size);
+
+	set_fs(old_fs);
+
+	mod->args = args;
+	if (section_addr(hdr, sechdrs, secstrings, "__obsparm"))
+		printk(KERN_WARNING "%s: Ignoring obsolete parameters\n",
+		       mod->name);
+
+	/* Now sew it into the lists so we can get lockdep and oops
+	 * info during argument parsing.  Noone should access us, since
+	 * strong_try_module_get() will fail.
+	 * lockdep/oops can run asynchronous, so use the RCU list insertion
+	 * function to insert in a way safe to concurrent readers.
+	 * The mutex protects against concurrent writers.
+	 */
+	list_add_rcu(&mod->list, &modules);
+
+	err = parse_args(mod->name, mod->args, kp, num_kp, NULL);
+	if (err < 0)
+		goto unlink;
+
+	err = mod_sysfs_setup(mod, kp, num_kp);
+	if (err < 0)
+		goto unlink;
+	add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
+	add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
+
+	/* Size of section 0 is 0, so this works well if no unwind info. */
+	mod->unwind_info = unwind_add_table(mod,
+					    (void *)sechdrs[unwindex].sh_addr,
+					    sechdrs[unwindex].sh_size);
+
+	/* Get rid of temporary copy */
+	vfree(hdr);
+
+	/* Done! */
+	return mod;
+
+ unlink:
+	stop_machine(__unlink_module, mod, NULL);
+	module_arch_cleanup(mod);
+ cleanup:
+	kobject_del(&mod->mkobj.kobj);
+	kobject_put(&mod->mkobj.kobj);
+	ftrace_release(mod->module_core, mod->core_size);
+ free_unload:
+	module_unload_free(mod);
+	module_free(mod, mod->module_init);
+ free_core:
+	module_free(mod, mod->module_core);
+ free_percpu:
+	if (percpu)
+		percpu_modfree(percpu);
+ free_mod:
+	kfree(args);
+ free_hdr:
+	vfree(hdr);
+	return ERR_PTR(err);
+
+ truncated:
+	printk(KERN_ERR "Module len %lu truncated\n", len);
+	err = -ENOEXEC;
+	goto free_hdr;
+}
+
+/* This is where the real work happens */
+SYSCALL_DEFINE3(init_module, void __user *, umod,
+		unsigned long, len, const char __user *, uargs)
+{
+	struct module *mod;
+	int ret = 0;
+
+	/* Must have permission */
+	if (!capable(CAP_SYS_MODULE))
+		return -EPERM;
+
+	/* Only one module load at a time, please */
+	if (mutex_lock_interruptible(&module_mutex) != 0)
+		return -EINTR;
+
+	/* Do all the hard work */
+	mod = load_module(umod, len, uargs);
+	if (IS_ERR(mod)) {
+		mutex_unlock(&module_mutex);
+		return PTR_ERR(mod);
+	}
+
+	/* Drop lock so they can recurse */
+	mutex_unlock(&module_mutex);
+
+	blocking_notifier_call_chain(&module_notify_list,
+			MODULE_STATE_COMING, mod);
+
+	/* Start the module */
+	if (mod->init != NULL)
+		ret = do_one_initcall(mod->init);
+	if (ret < 0) {
+		/* Init routine failed: abort.  Try to protect us from
+                   buggy refcounters. */
+		mod->state = MODULE_STATE_GOING;
+		synchronize_sched();
+		module_put(mod);
+		blocking_notifier_call_chain(&module_notify_list,
+					     MODULE_STATE_GOING, mod);
+		mutex_lock(&module_mutex);
+		free_module(mod);
+		mutex_unlock(&module_mutex);
+		wake_up(&module_wq);
+		return ret;
+	}
+	if (ret > 0) {
+		printk(KERN_WARNING "%s: '%s'->init suspiciously returned %d, "
+				    "it should follow 0/-E convention\n"
+		       KERN_WARNING "%s: loading module anyway...\n",
+		       __func__, mod->name, ret,
+		       __func__);
+		dump_stack();
+	}
+
+	/* Now it's a first class citizen!  Wake up anyone waiting for it. */
+	mod->state = MODULE_STATE_LIVE;
+	wake_up(&module_wq);
+
+	mutex_lock(&module_mutex);
+	/* Drop initial reference. */
+	module_put(mod);
+	unwind_remove_table(mod->unwind_info, 1);
+	module_free(mod, mod->module_init);
+	mod->module_init = NULL;
+	mod->init_size = 0;
+	mod->init_text_size = 0;
+	mutex_unlock(&module_mutex);
+
+	return 0;
+}
+
+static inline int within(unsigned long addr, void *start, unsigned long size)
+{
+	return ((void *)addr >= start && (void *)addr < start + size);
+}
+
+#ifdef CONFIG_KALLSYMS
+/*
+ * This ignores the intensely annoying "mapping symbols" found
+ * in ARM ELF files: $a, $t and $d.
+ */
+static inline int is_arm_mapping_symbol(const char *str)
+{
+	return str[0] == '$' && strchr("atd", str[1])
+	       && (str[2] == '\0' || str[2] == '.');
+}
+
+static const char *get_ksymbol(struct module *mod,
+			       unsigned long addr,
+			       unsigned long *size,
+			       unsigned long *offset)
+{
+	unsigned int i, best = 0;
+	unsigned long nextval;
+
+	/* At worse, next value is at end of module */
+	if (within(addr, mod->module_init, mod->init_size))
+		nextval = (unsigned long)mod->module_init+mod->init_text_size;
+	else
+		nextval = (unsigned long)mod->module_core+mod->core_text_size;
+
+	/* Scan for closest preceeding symbol, and next symbol. (ELF
+	   starts real symbols at 1). */
+	for (i = 1; i < mod->num_symtab; i++) {
+		if (mod->symtab[i].st_shndx == SHN_UNDEF)
+			continue;
+
+		/* We ignore unnamed symbols: they're uninformative
+		 * and inserted at a whim. */
+		if (mod->symtab[i].st_value <= addr
+		    && mod->symtab[i].st_value > mod->symtab[best].st_value
+		    && *(mod->strtab + mod->symtab[i].st_name) != '\0'
+		    && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
+			best = i;
+		if (mod->symtab[i].st_value > addr
+		    && mod->symtab[i].st_value < nextval
+		    && *(mod->strtab + mod->symtab[i].st_name) != '\0'
+		    && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
+			nextval = mod->symtab[i].st_value;
+	}
+
+	if (!best)
+		return NULL;
+
+	if (size)
+		*size = nextval - mod->symtab[best].st_value;
+	if (offset)
+		*offset = addr - mod->symtab[best].st_value;
+	return mod->strtab + mod->symtab[best].st_name;
+}
+
+/* For kallsyms to ask for address resolution.  NULL means not found.  Careful
+ * not to lock to avoid deadlock on oopses, simply disable preemption. */
+const char *module_address_lookup(unsigned long addr,
+			    unsigned long *size,
+			    unsigned long *offset,
+			    char **modname,
+			    char *namebuf)
+{
+	struct module *mod;
+	const char *ret = NULL;
+
+	preempt_disable();
+	list_for_each_entry_rcu(mod, &modules, list) {
+		if (within(addr, mod->module_init, mod->init_size)
+		    || within(addr, mod->module_core, mod->core_size)) {
+			if (modname)
+				*modname = mod->name;
+			ret = get_ksymbol(mod, addr, size, offset);
+			break;
+		}
+	}
+	/* Make a copy in here where it's safe */
+	if (ret) {
+		strncpy(namebuf, ret, KSYM_NAME_LEN - 1);
+		ret = namebuf;
+	}
+	preempt_enable();
+	return ret;
+}
+
+int lookup_module_symbol_name(unsigned long addr, char *symname)
+{
+	struct module *mod;
+
+	preempt_disable();
+	list_for_each_entry_rcu(mod, &modules, list) {
+		if (within(addr, mod->module_init, mod->init_size) ||
+		    within(addr, mod->module_core, mod->core_size)) {
+			const char *sym;
+
+			sym = get_ksymbol(mod, addr, NULL, NULL);
+			if (!sym)
+				goto out;
+			strlcpy(symname, sym, KSYM_NAME_LEN);
+			preempt_enable();
+			return 0;
+		}
+	}
+out:
+	preempt_enable();
+	return -ERANGE;
+}
+
+int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size,
+			unsigned long *offset, char *modname, char *name)
+{
+	struct module *mod;
+
+	preempt_disable();
+	list_for_each_entry_rcu(mod, &modules, list) {
+		if (within(addr, mod->module_init, mod->init_size) ||
+		    within(addr, mod->module_core, mod->core_size)) {
+			const char *sym;
+
+			sym = get_ksymbol(mod, addr, size, offset);
+			if (!sym)
+				goto out;
+			if (modname)
+				strlcpy(modname, mod->name, MODULE_NAME_LEN);
+			if (name)
+				strlcpy(name, sym, KSYM_NAME_LEN);
+			preempt_enable();
+			return 0;
+		}
+	}
+out:
+	preempt_enable();
+	return -ERANGE;
+}
+
+int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
+			char *name, char *module_name, int *exported)
+{
+	struct module *mod;
+
+	preempt_disable();
+	list_for_each_entry_rcu(mod, &modules, list) {
+		if (symnum < mod->num_symtab) {
+			*value = mod->symtab[symnum].st_value;
+			*type = mod->symtab[symnum].st_info;
+			strlcpy(name, mod->strtab + mod->symtab[symnum].st_name,
+				KSYM_NAME_LEN);
+			strlcpy(module_name, mod->name, MODULE_NAME_LEN);
+			*exported = is_exported(name, mod);
+			preempt_enable();
+			return 0;
+		}
+		symnum -= mod->num_symtab;
+	}
+	preempt_enable();
+	return -ERANGE;
+}
+
+static unsigned long mod_find_symname(struct module *mod, const char *name)
+{
+	unsigned int i;
+
+	for (i = 0; i < mod->num_symtab; i++)
+		if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 &&
+		    mod->symtab[i].st_info != 'U')
+			return mod->symtab[i].st_value;
+	return 0;
+}
+
+/* Look for this name: can be of form module:name. */
+unsigned long module_kallsyms_lookup_name(const char *name)
+{
+	struct module *mod;
+	char *colon;
+	unsigned long ret = 0;
+
+	/* Don't lock: we're in enough trouble already. */
+	preempt_disable();
+	if ((colon = strchr(name, ':')) != NULL) {
+		*colon = '\0';
+		if ((mod = find_module(name)) != NULL)
+			ret = mod_find_symname(mod, colon+1);
+		*colon = ':';
+	} else {
+		list_for_each_entry_rcu(mod, &modules, list)
+			if ((ret = mod_find_symname(mod, name)) != 0)
+				break;
+	}
+	preempt_enable();
+	return ret;
+}
+#endif /* CONFIG_KALLSYMS */
+
+static char *module_flags(struct module *mod, char *buf)
+{
+	int bx = 0;
+
+	if (mod->taints ||
+	    mod->state == MODULE_STATE_GOING ||
+	    mod->state == MODULE_STATE_COMING) {
+		buf[bx++] = '(';
+		if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE))
+			buf[bx++] = 'P';
+		if (mod->taints & (1 << TAINT_FORCED_MODULE))
+			buf[bx++] = 'F';
+		if (mod->taints & (1 << TAINT_CRAP))
+			buf[bx++] = 'C';
+		/*
+		 * TAINT_FORCED_RMMOD: could be added.
+		 * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
+		 * apply to modules.
+		 */
+
+		/* Show a - for module-is-being-unloaded */
+		if (mod->state == MODULE_STATE_GOING)
+			buf[bx++] = '-';
+		/* Show a + for module-is-being-loaded */
+		if (mod->state == MODULE_STATE_COMING)
+			buf[bx++] = '+';
+		buf[bx++] = ')';
+	}
+	buf[bx] = '\0';
+
+	return buf;
+}
+
+#ifdef CONFIG_PROC_FS
+/* Called by the /proc file system to return a list of modules. */
+static void *m_start(struct seq_file *m, loff_t *pos)
+{
+	mutex_lock(&module_mutex);
+	return seq_list_start(&modules, *pos);
+}
+
+static void *m_next(struct seq_file *m, void *p, loff_t *pos)
+{
+	return seq_list_next(p, &modules, pos);
+}
+
+static void m_stop(struct seq_file *m, void *p)
+{
+	mutex_unlock(&module_mutex);
+}
+
+static int m_show(struct seq_file *m, void *p)
+{
+	struct module *mod = list_entry(p, struct module, list);
+	char buf[8];
+
+	seq_printf(m, "%s %u",
+		   mod->name, mod->init_size + mod->core_size);
+	print_unload_info(m, mod);
+
+	/* Informative for users. */
+	seq_printf(m, " %s",
+		   mod->state == MODULE_STATE_GOING ? "Unloading":
+		   mod->state == MODULE_STATE_COMING ? "Loading":
+		   "Live");
+	/* Used by oprofile and other similar tools. */
+	seq_printf(m, " 0x%p", mod->module_core);
+
+	/* Taints info */
+	if (mod->taints)
+		seq_printf(m, " %s", module_flags(mod, buf));
+
+	seq_printf(m, "\n");
+	return 0;
+}
+
+/* Format: modulename size refcount deps address
+
+   Where refcount is a number or -, and deps is a comma-separated list
+   of depends or -.
+*/
+static const struct seq_operations modules_op = {
+	.start	= m_start,
+	.next	= m_next,
+	.stop	= m_stop,
+	.show	= m_show
+};
+
+static int modules_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &modules_op);
+}
+
+static const struct file_operations proc_modules_operations = {
+	.open		= modules_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= seq_release,
+};
+
+static int __init proc_modules_init(void)
+{
+	proc_create("modules", 0, NULL, &proc_modules_operations);
+	return 0;
+}
+module_init(proc_modules_init);
+#endif
+
+/* Given an address, look for it in the module exception tables. */
+const struct exception_table_entry *search_module_extables(unsigned long addr)
+{
+	const struct exception_table_entry *e = NULL;
+	struct module *mod;
+
+	preempt_disable();
+	list_for_each_entry_rcu(mod, &modules, list) {
+		if (mod->num_exentries == 0)
+			continue;
+
+		e = search_extable(mod->extable,
+				   mod->extable + mod->num_exentries - 1,
+				   addr);
+		if (e)
+			break;
+	}
+	preempt_enable();
+
+	/* Now, if we found one, we are running inside it now, hence
+	   we cannot unload the module, hence no refcnt needed. */
+	return e;
+}
+
+/*
+ * Is this a valid module address?
+ */
+int is_module_address(unsigned long addr)
+{
+	struct module *mod;
+
+	preempt_disable();
+
+	list_for_each_entry_rcu(mod, &modules, list) {
+		if (within(addr, mod->module_core, mod->core_size)) {
+			preempt_enable();
+			return 1;
+		}
+	}
+
+	preempt_enable();
+
+	return 0;
+}
+
+
+/* Is this a valid kernel address? */
+struct module *__module_text_address(unsigned long addr)
+{
+	struct module *mod;
+
+	if (addr < module_addr_min || addr > module_addr_max)
+		return NULL;
+
+	list_for_each_entry_rcu(mod, &modules, list)
+		if (within(addr, mod->module_init, mod->init_text_size)
+		    || within(addr, mod->module_core, mod->core_text_size))
+			return mod;
+	return NULL;
+}
+
+struct module *module_text_address(unsigned long addr)
+{
+	struct module *mod;
+
+	preempt_disable();
+	mod = __module_text_address(addr);
+	preempt_enable();
+
+	return mod;
+}
+
+/* Don't grab lock, we're oopsing. */
+void print_modules(void)
+{
+	struct module *mod;
+	char buf[8];
+
+	printk("Modules linked in:");
+	/* Most callers should already have preempt disabled, but make sure */
+	preempt_disable();
+	list_for_each_entry_rcu(mod, &modules, list)
+		printk(" %s%s", mod->name, module_flags(mod, buf));
+	preempt_enable();
+	if (last_unloaded_module[0])
+		printk(" [last unloaded: %s]", last_unloaded_module);
+	printk("\n");
+}
+
+#ifdef CONFIG_MODVERSIONS
+/* Generate the signature for struct module here, too, for modversions. */
+void struct_module(struct module *mod) { return; }
+EXPORT_SYMBOL(struct_module);
+#endif
+
+#ifdef CONFIG_MARKERS
+void module_update_markers(void)
+{
+	struct module *mod;
+
+	mutex_lock(&module_mutex);
+	list_for_each_entry(mod, &modules, list)
+		if (!mod->taints)
+			marker_update_probe_range(mod->markers,
+				mod->markers + mod->num_markers);
+	mutex_unlock(&module_mutex);
+}
+#endif
+
+#ifdef CONFIG_TRACEPOINTS
+void module_update_tracepoints(void)
+{
+	struct module *mod;
+
+	mutex_lock(&module_mutex);
+	list_for_each_entry(mod, &modules, list)
+		if (!mod->taints)
+			tracepoint_update_probe_range(mod->tracepoints,
+				mod->tracepoints + mod->num_tracepoints);
+	mutex_unlock(&module_mutex);
+}
+
+/*
+ * Returns 0 if current not found.
+ * Returns 1 if current found.
+ */
+int module_get_iter_tracepoints(struct tracepoint_iter *iter)
+{
+	struct module *iter_mod;
+	int found = 0;
+
+	mutex_lock(&module_mutex);
+	list_for_each_entry(iter_mod, &modules, list) {
+		if (!iter_mod->taints) {
+			/*
+			 * Sorted module list
+			 */
+			if (iter_mod < iter->module)
+				continue;
+			else if (iter_mod > iter->module)
+				iter->tracepoint = NULL;
+			found = tracepoint_get_iter_range(&iter->tracepoint,
+				iter_mod->tracepoints,
+				iter_mod->tracepoints
+					+ iter_mod->num_tracepoints);
+			if (found) {
+				iter->module = iter_mod;
+				break;
+			}
+		}
+	}
+	mutex_unlock(&module_mutex);
+	return found;
+}
+#endif