Merge ../powerpc-merge

17 files changed, 240 insertions, 140 deletions

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index fac48ad..292f8b2 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -2,8 +2,8 @@
  * Processor capabilities determination functions.
  *
  * Copyright (C) xxxx  the Anonymous
+ * Copyright (C) 1994 - 2006 Ralf Baechle
  * Copyright (C) 2003, 2004  Maciej W. Rozycki
- * Copyright (C) 1994 - 2003 Ralf Baechle
  * Copyright (C) 2001, 2004  MIPS Inc.
  *
  * This program is free software; you can redistribute it and/or
@@ -641,10 +641,9 @@ static inline void cpu_probe_sibyte(struct cpuinfo_mips *c)
 	switch (c->processor_id & 0xff00) {
 	case PRID_IMP_SB1:
 		c->cputype = CPU_SB1;
-#ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
 		/* FPU in pass1 is known to have issues. */
-		c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR);
-#endif
+		if ((c->processor_id & 0xff) < 0x20)
+			c->options &= ~(MIPS_CPU_FPU | MIPS_CPU_32FPR);
 		break;
 	case PRID_IMP_SB1A:
 		c->cputype = CPU_SB1A;
diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S
index aa18a8b..13f22d1 100644
--- a/arch/mips/kernel/genex.S
+++ b/arch/mips/kernel/genex.S
@@ -233,11 +233,11 @@ NESTED(except_vec_nmi, 0, sp)
 NESTED(nmi_handler, PT_SIZE, sp)
 	.set	push
 	.set	noat
-	.set	mips3
 	SAVE_ALL
  	move	a0, sp
 	jal	nmi_exception_handler
 	RESTORE_ALL
+	.set	mips3
 	eret
 	.set	pop
 	END(nmi_handler)
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index fa98f10..5232fc7 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -4,6 +4,7 @@
  * for more details.
  *
  * Copyright (C) 1994 - 1999, 2000 by Ralf Baechle and others.
+ * Copyright (C) 2005, 2006 by Ralf Baechle (ralf@linux-mips.org)
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
  * Copyright (C) 2004 Thiemo Seufer
  */
@@ -58,8 +59,8 @@ ATTRIB_NORET void cpu_idle(void)
 	}
 }
 
-extern int do_signal(sigset_t *oldset, struct pt_regs *regs);
-extern int do_signal32(sigset_t *oldset, struct pt_regs *regs);
+extern void do_signal(struct pt_regs *regs);
+extern void do_signal32(struct pt_regs *regs);
 
 /*
  * Native o32 and N64 ABI without DSP ASE
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c
index 0c82b25..0d5cf97 100644
--- a/arch/mips/kernel/ptrace32.c
+++ b/arch/mips/kernel/ptrace32.c
@@ -88,7 +88,7 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
 		ret = -EIO;
 		if (copied != sizeof(tmp))
 			break;
-		ret = put_user(tmp, (unsigned int *) (unsigned long) data);
+		ret = put_user(tmp, (unsigned int __user *) (unsigned long) data);
 		break;
 	}
 
@@ -174,8 +174,10 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
 		case FPC_EIR: {	/* implementation / version register */
 			unsigned int flags;
 
-			if (!cpu_has_fpu)
+			if (!cpu_has_fpu) {
+				tmp = 0;
 				break;
+			}
 
 			preempt_disable();
 			if (cpu_has_mipsmt) {
@@ -194,15 +196,18 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
 			preempt_enable();
 			break;
 		}
-		case DSP_BASE ... DSP_BASE + 5:
+		case DSP_BASE ... DSP_BASE + 5: {
+			dspreg_t *dregs;
+
 			if (!cpu_has_dsp) {
 				tmp = 0;
 				ret = -EIO;
 				goto out_tsk;
 			}
-			dspreg_t *dregs = __get_dsp_regs(child);
+			dregs = __get_dsp_regs(child);
 			tmp = (unsigned long) (dregs[addr - DSP_BASE]);
 			break;
+		}
 		case DSP_CONTROL:
 			if (!cpu_has_dsp) {
 				tmp = 0;
@@ -216,7 +221,7 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
 			ret = -EIO;
 			goto out_tsk;
 		}
-		ret = put_user(tmp, (unsigned *) (unsigned long) data);
+		ret = put_user(tmp, (unsigned __user *) (unsigned long) data);
 		break;
 	}
 
@@ -304,15 +309,18 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data)
 			else
 				child->thread.fpu.soft.fcr31 = data;
 			break;
-		case DSP_BASE ... DSP_BASE + 5:
+		case DSP_BASE ... DSP_BASE + 5: {
+			dspreg_t *dregs;
+
 			if (!cpu_has_dsp) {
 				ret = -EIO;
 				break;
 			}
 
-			dspreg_t *dregs = __get_dsp_regs(child);
+			dregs = __get_dsp_regs(child);
 			dregs[addr - DSP_BASE] = data;
 			break;
+		}
 		case DSP_CONTROL:
 			if (!cpu_has_dsp) {
 				ret = -EIO;
diff --git a/arch/mips/kernel/reset.c b/arch/mips/kernel/reset.c
index 5e37df31..621037d 100644
--- a/arch/mips/kernel/reset.c
+++ b/arch/mips/kernel/reset.c
@@ -3,17 +3,16 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2001 by Ralf Baechle
+ * Copyright (C) 2001, 06 by Ralf Baechle (ralf@linux-mips.org)
  * Copyright (C) 2001 MIPS Technologies, Inc.
  */
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/pm.h>
 #include <linux/types.h>
 #include <linux/reboot.h>
-#include <asm/reboot.h>
 
-void (*pm_power_off)(void);
-EXPORT_SYMBOL(pm_power_off);
+#include <asm/reboot.h>
 
 /*
  * Urgs ...  Too many MIPS machines to handle this in a generic way.
@@ -22,23 +21,22 @@ EXPORT_SYMBOL(pm_power_off);
  */
 void (*_machine_restart)(char *command);
 void (*_machine_halt)(void);
-void (*_machine_power_off)(void);
+void (*pm_power_off)(void);
 
 void machine_restart(char *command)
 {
-	_machine_restart(command);
+	if (_machine_restart)
+		_machine_restart(command);
 }
 
 void machine_halt(void)
 {
-	_machine_halt();
+	if (_machine_halt)
+		_machine_halt();
 }
 
 void machine_power_off(void)
 {
 	if (pm_power_off)
 		pm_power_off();
-
-	_machine_power_off();
 }
-
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index 1d85511..986a9cf 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2005 MIPS Technologies, Inc.  All rights reserved.
+ * Copyright (C) 2005, 06 Ralf Baechle (ralf@linux-mips.org)
  *
  *  This program is free software; you can distribute it and/or modify it
  *  under the terms of the GNU General Public License (Version 2) as
@@ -20,9 +21,12 @@
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
 #include <linux/poll.h>
 #include <linux/sched.h>
 #include <linux/wait.h>
+
 #include <asm/mipsmtregs.h>
 #include <asm/bitops.h>
 #include <asm/cpu.h>
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index a42e0e8..d7c4a38 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -617,6 +617,23 @@ einval:	li	v0, -EINVAL
 	sys	sys_inotify_init	0
 	sys	sys_inotify_add_watch	3	/* 4285 */
 	sys	sys_inotify_rm_watch	2
+	sys	sys_migrate_pages	4
+	sys	sys_openat		4
+	sys	sys_mkdirat		3
+	sys	sys_mknodat		4	/* 4290 */
+	sys	sys_fchownat		5
+	sys	sys_futimesat		3
+	sys	sys_newfstatat		4
+	sys	sys_unlinkat		3
+	sys	sys_renameat		4	/* 4295 */
+	sys	sys_linkat		4
+	sys	sys_symlinkat		3
+	sys	sys_readlinkat		4
+	sys	sys_fchmodat		3
+	sys	sys_faccessat		3	/* 4300 */
+	sys	sys_pselect6		6
+	sys	sys_ppoll		5
+	sys	sys_unshare		1
 	.endm
 
 	/* We pre-compute the number of _instruction_ bytes needed to
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index 47bfbd4..98bf25d 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -443,3 +443,20 @@ sys_call_table:
 	PTR	sys_inotify_init
 	PTR	sys_inotify_add_watch
 	PTR	sys_inotify_rm_watch		/* 5245 */
+	PTR	sys_migrate_pages
+	PTR	sys_openat
+	PTR	sys_mkdirat
+	PTR	sys_mknodat
+	PTR	sys_fchownat			/* 5250 */
+	PTR	sys_futimesat
+	PTR	sys_newfstatat
+	PTR	sys_unlinkat
+	PTR	sys_renameat
+	PTR	sys_linkat			/* 5255 */
+	PTR	sys_symlinkat
+	PTR	sys_readlinkat
+	PTR	sys_fchmodat
+	PTR	sys_faccessat
+	PTR	sys_pselect6			/* 5260 */
+	PTR	sys_ppoll
+	PTR	sys_unshare
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index b465ced..bc4980c 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -369,3 +369,20 @@ EXPORT(sysn32_call_table)
 	PTR	sys_inotify_init
 	PTR	sys_inotify_add_watch
 	PTR	sys_inotify_rm_watch
+	PTR	sys_migrate_pages		/* 6250 */
+	PTR	sys_openat
+	PTR	sys_mkdirat
+	PTR	sys_mknodat
+	PTR	sys_fchownat
+	PTR	sys_futimesat			/* 6255 */
+	PTR	sys_newfstatat
+	PTR	sys_unlinkat
+	PTR	sys_renameat
+	PTR	sys_linkat
+	PTR	sys_symlinkat			/* 6260 */
+	PTR	sys_readlinkat
+	PTR	sys_fchmodat
+	PTR	sys_faccessat
+	PTR	sys_pselect6
+	PTR	sys_ppoll			/* 6265 */
+	PTR	sys_unshare
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 3d338ca..5b04140 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -491,4 +491,21 @@ sys_call_table:
 	PTR	sys_inotify_init
 	PTR	sys_inotify_add_watch		/* 4285 */
 	PTR	sys_inotify_rm_watch
+	PTR	sys_migrate_pages
+	PTR	compat_sys_openat
+	PTR	sys_mkdirat
+	PTR	sys_mknodat			/* 4290 */
+	PTR	sys_fchownat
+	PTR	compat_sys_futimesat
+	PTR	compat_sys_newfstatat
+	PTR	sys_unlinkat
+	PTR	sys_renameat			/* 4295 */
+	PTR	sys_linkat
+	PTR	sys_symlinkat
+	PTR	sys_readlinkat
+	PTR	sys_fchmodat
+	PTR	sys_faccessat			/* 4300 */
+	PTR	sys_pselect6
+	PTR	sys_ppoll
+	PTR	sys_unshare
 	.size	sys_call_table,.-sys_call_table
diff --git a/arch/mips/kernel/signal-common.h b/arch/mips/kernel/signal-common.h
index 0f66ae58..0fbc492 100644
--- a/arch/mips/kernel/signal-common.h
+++ b/arch/mips/kernel/signal-common.h
@@ -11,7 +11,7 @@
 #include <linux/config.h>
 
 static inline int
-setup_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
+setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
 {
 	int err = 0;
 
@@ -82,7 +82,7 @@ out:
 }
 
 static inline int
-restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
+restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
 {
 	unsigned int used_math;
 	unsigned long treg;
@@ -157,7 +157,7 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
 /*
  * Determine which stack to use..
  */
-static inline void *
+static inline void __user *
 get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
 {
 	unsigned long sp;
@@ -176,7 +176,7 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
 	if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0))
 		sp = current->sas_ss_sp + current->sas_ss_size;
 
-	return (void *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? 32 : ALMASK));
+	return (void __user *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? 32 : ALMASK));
 }
 
 static inline int install_sigtramp(unsigned int __user *tramp,
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index 7d1800f..c974cc9 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -39,8 +39,6 @@
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
-int do_signal(sigset_t *oldset, struct pt_regs *regs);
-
 /*
  * Atomically swap in the new signal mask, and wait for a signal.
  */
@@ -50,7 +48,7 @@ save_static_function(sys_sigsuspend);
 __attribute_used__ noinline static int
 _sys_sigsuspend(nabi_no_regargs struct pt_regs regs)
 {
-	sigset_t saveset, newset;
+	sigset_t newset;
 	sigset_t __user *uset;
 
 	uset = (sigset_t __user *) regs.regs[4];
@@ -59,19 +57,15 @@ _sys_sigsuspend(nabi_no_regargs struct pt_regs regs)
 	sigdelsetmask(&newset, ~_BLOCKABLE);
 
 	spin_lock_irq(&current->sighand->siglock);
-	saveset = current->blocked;
+	current->saved_sigmask = current->blocked;
 	current->blocked = newset;
 	recalc_sigpending();
 	spin_unlock_irq(&current->sighand->siglock);
 
-	regs.regs[2] = EINTR;
-	regs.regs[7] = 1;
-	while (1) {
-		current->state = TASK_INTERRUPTIBLE;
-		schedule();
-		if (do_signal(&saveset, &regs))
-			return -EINTR;
-	}
+	current->state = TASK_INTERRUPTIBLE;
+	schedule();
+	set_thread_flag(TIF_RESTORE_SIGMASK);
+	return -ERESTARTNOHAND;
 }
 #endif
 
@@ -79,7 +73,7 @@ save_static_function(sys_rt_sigsuspend);
 __attribute_used__ noinline static int
 _sys_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
 {
-	sigset_t saveset, newset;
+	sigset_t newset;
 	sigset_t __user *unewset;
 	size_t sigsetsize;
 
@@ -94,19 +88,15 @@ _sys_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
 	sigdelsetmask(&newset, ~_BLOCKABLE);
 
 	spin_lock_irq(&current->sighand->siglock);
-	saveset = current->blocked;
+	current->saved_sigmask = current->blocked;
 	current->blocked = newset;
         recalc_sigpending();
 	spin_unlock_irq(&current->sighand->siglock);
 
-	regs.regs[2] = EINTR;
-	regs.regs[7] = 1;
-	while (1) {
-		current->state = TASK_INTERRUPTIBLE;
-		schedule();
-		if (do_signal(&saveset, &regs))
-			return -EINTR;
-	}
+	current->state = TASK_INTERRUPTIBLE;
+	schedule();
+	set_thread_flag(TIF_RESTORE_SIGMASK);
+	return -ERESTARTNOHAND;
 }
 
 #ifdef CONFIG_TRAD_SIGNALS
@@ -199,10 +189,10 @@ save_static_function(sys_sigreturn);
 __attribute_used__ noinline static void
 _sys_sigreturn(nabi_no_regargs struct pt_regs regs)
 {
-	struct sigframe *frame;
+	struct sigframe __user *frame;
 	sigset_t blocked;
 
-	frame = (struct sigframe *) regs.regs[29];
+	frame = (struct sigframe __user *) regs.regs[29];
 	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
 		goto badframe;
 	if (__copy_from_user(&blocked, &frame->sf_mask, sizeof(blocked)))
@@ -236,11 +226,11 @@ save_static_function(sys_rt_sigreturn);
 __attribute_used__ noinline static void
 _sys_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 {
-	struct rt_sigframe *frame;
+	struct rt_sigframe __user *frame;
 	sigset_t set;
 	stack_t st;
 
-	frame = (struct rt_sigframe *) regs.regs[29];
+	frame = (struct rt_sigframe __user *) regs.regs[29];
 	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
 		goto badframe;
 	if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
@@ -259,7 +249,7 @@ _sys_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 		goto badframe;
 	/* It is more difficult to avoid calling this function than to
 	   call it and ignore errors.  */
-	do_sigaltstack(&st, NULL, regs.regs[29]);
+	do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
 
 	/*
 	 * Don't let your children do this ...
@@ -279,7 +269,7 @@ badframe:
 int setup_frame(struct k_sigaction * ka, struct pt_regs *regs,
 	int signr, sigset_t *set)
 {
-	struct sigframe *frame;
+	struct sigframe __user *frame;
 	int err = 0;
 
 	frame = get_sigframe(ka, regs, sizeof(*frame));
@@ -315,18 +305,18 @@ int setup_frame(struct k_sigaction * ka, struct pt_regs *regs,
 	       current->comm, current->pid,
 	       frame, regs->cp0_epc, frame->regs[31]);
 #endif
-        return 1;
+        return 0;
 
 give_sigsegv:
 	force_sigsegv(signr, current);
-	return 0;
+	return -EFAULT;
 }
 #endif
 
 int setup_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
 	int signr, sigset_t *set, siginfo_t *info)
 {
-	struct rt_sigframe *frame;
+	struct rt_sigframe __user *frame;
 	int err = 0;
 
 	frame = get_sigframe(ka, regs, sizeof(*frame));
@@ -340,7 +330,7 @@ int setup_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
 
 	/* Create the ucontext.  */
 	err |= __put_user(0, &frame->rs_uc.uc_flags);
-	err |= __put_user(0, &frame->rs_uc.uc_link);
+	err |= __put_user(NULL, &frame->rs_uc.uc_link);
 	err |= __put_user((void *)current->sas_ss_sp,
 	                  &frame->rs_uc.uc_stack.ss_sp);
 	err |= __put_user(sas_ss_flags(regs->regs[29]),
@@ -375,11 +365,11 @@ int setup_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
 	       current->comm, current->pid,
 	       frame, regs->cp0_epc, regs->regs[31]);
 #endif
-	return 1;
+	return 0;
 
 give_sigsegv:
 	force_sigsegv(signr, current);
-	return 0;
+	return -EFAULT;
 }
 
 static inline int handle_signal(unsigned long sig, siginfo_t *info,
@@ -393,7 +383,7 @@ static inline int handle_signal(unsigned long sig, siginfo_t *info,
 		regs->regs[2] = EINTR;
 		break;
 	case ERESTARTSYS:
-		if(!(ka->sa.sa_flags & SA_RESTART)) {
+		if (!(ka->sa.sa_flags & SA_RESTART)) {
 			regs->regs[2] = EINTR;
 			break;
 		}
@@ -420,9 +410,10 @@ static inline int handle_signal(unsigned long sig, siginfo_t *info,
 	return ret;
 }
 
-int do_signal(sigset_t *oldset, struct pt_regs *regs)
+void do_signal(struct pt_regs *regs)
 {
 	struct k_sigaction ka;
+	sigset_t *oldset;
 	siginfo_t info;
 	int signr;
 
@@ -432,17 +423,31 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
 	 * if so.
 	 */
 	if (!user_mode(regs))
-		return 1;
+		return;
 
 	if (try_to_freeze())
 		goto no_signal;
 
-	if (!oldset)
+	if (test_thread_flag(TIF_RESTORE_SIGMASK))
+		oldset = &current->saved_sigmask;
+	else
 		oldset = &current->blocked;
 
+
 	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-	if (signr > 0)
-		return handle_signal(signr, &info, &ka, oldset, regs);
+	if (signr > 0) {
+		/* Whee!  Actually deliver the signal.  */
+		if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
+			/*
+			 * A signal was successfully delivered; the saved
+			 * sigmask will have been stored in the signal frame,
+			 * and will be restored by sigreturn, so we can simply
+			 * clear the TIF_RESTORE_SIGMASK flag.
+			 */
+			if (test_thread_flag(TIF_RESTORE_SIGMASK))
+				clear_thread_flag(TIF_RESTORE_SIGMASK);
+		}
+	}
 
 no_signal:
 	/*
@@ -463,18 +468,25 @@ no_signal:
 			regs->cp0_epc -= 4;
 		}
 	}
-	return 0;
+
+	/*
+	 * If there's no signal to deliver, we just put the saved sigmask
+	 * back
+	 */
+	if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+		clear_thread_flag(TIF_RESTORE_SIGMASK);
+		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+	}
 }
 
 /*
  * notification of userspace execution resumption
- * - triggered by current->work.notify_resume
+ * - triggered by the TIF_WORK_MASK flags
  */
-asmlinkage void do_notify_resume(struct pt_regs *regs, sigset_t *oldset,
+asmlinkage void do_notify_resume(struct pt_regs *regs, void *unused,
 	__u32 thread_info_flags)
 {
 	/* deal with pending signal delivery */
-	if (thread_info_flags & _TIF_SIGPENDING) {
-		current->thread.abi->do_signal(oldset, regs);
-	}
+	if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+		current->thread.abi->do_signal(regs);
 }
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 98b185b..da3271e 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -144,7 +144,7 @@ struct ucontext32 {
 extern void __put_sigset_unknown_nsig(void);
 extern void __get_sigset_unknown_nsig(void);
 
-static inline int put_sigset(const sigset_t *kbuf, compat_sigset_t *ubuf)
+static inline int put_sigset(const sigset_t *kbuf, compat_sigset_t __user *ubuf)
 {
 	int err = 0;
 
@@ -269,7 +269,7 @@ asmlinkage int sys32_sigaction(int sig, const struct sigaction32 *act,
 		if (!access_ok(VERIFY_READ, act, sizeof(*act)))
 			return -EFAULT;
 		err |= __get_user(handler, &act->sa_handler);
-		new_ka.sa.sa_handler = (void*)(s64)handler;
+		new_ka.sa.sa_handler = (void __user *)(s64)handler;
 		err |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 		err |= __get_user(mask, &act->sa_mask.sig[0]);
 		if (err)
@@ -299,8 +299,8 @@ asmlinkage int sys32_sigaction(int sig, const struct sigaction32 *act,
 
 asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs)
 {
-	const stack32_t *uss = (const stack32_t *) regs.regs[4];
-	stack32_t *uoss = (stack32_t *) regs.regs[5];
+	const stack32_t __user *uss = (const stack32_t __user *) regs.regs[4];
+	stack32_t __user *uoss = (stack32_t __user *) regs.regs[5];
 	unsigned long usp = regs.regs[29];
 	stack_t kss, koss;
 	int ret, err = 0;
@@ -319,7 +319,8 @@ asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs)
 	}
 
 	set_fs (KERNEL_DS);
-	ret = do_sigaltstack(uss ? &kss : NULL , uoss ? &koss : NULL, usp);
+	ret = do_sigaltstack(uss ? (stack_t __user *)&kss : NULL,
+			     uoss ? (stack_t __user *)&koss : NULL, usp);
 	set_fs (old_fs);
 
 	if (!ret && uoss) {
@@ -335,7 +336,7 @@ asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs)
 	return ret;
 }
 
-static int restore_sigcontext32(struct pt_regs *regs, struct sigcontext32 *sc)
+static int restore_sigcontext32(struct pt_regs *regs, struct sigcontext32 __user *sc)
 {
 	u32 used_math;
 	int err = 0;
@@ -420,7 +421,7 @@ struct rt_sigframe32 {
 #endif
 };
 
-int copy_siginfo_to_user32(compat_siginfo_t *to, siginfo_t *from)
+int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
 {
 	int err;
 
@@ -455,7 +456,7 @@ int copy_siginfo_to_user32(compat_siginfo_t *to, siginfo_t *from)
 			err |= __put_user(from->si_uid, &to->si_uid);
 			break;
 		case __SI_FAULT >> 16:
-			err |= __put_user((long)from->si_addr, &to->si_addr);
+			err |= __put_user((unsigned long)from->si_addr, &to->si_addr);
 			break;
 		case __SI_POLL >> 16:
 			err |= __put_user(from->si_band, &to->si_band);
@@ -476,10 +477,10 @@ save_static_function(sys32_sigreturn);
 __attribute_used__ noinline static void
 _sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
 {
-	struct sigframe *frame;
+	struct sigframe __user *frame;
 	sigset_t blocked;
 
-	frame = (struct sigframe *) regs.regs[29];
+	frame = (struct sigframe __user *) regs.regs[29];
 	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
 		goto badframe;
 	if (__copy_from_user(&blocked, &frame->sf_mask, sizeof(blocked)))
@@ -512,13 +513,13 @@ save_static_function(sys32_rt_sigreturn);
 __attribute_used__ noinline static void
 _sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 {
-	struct rt_sigframe32 *frame;
+	struct rt_sigframe32 __user *frame;
 	mm_segment_t old_fs;
 	sigset_t set;
 	stack_t st;
 	s32 sp;
 
-	frame = (struct rt_sigframe32 *) regs.regs[29];
+	frame = (struct rt_sigframe32 __user *) regs.regs[29];
 	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
 		goto badframe;
 	if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
@@ -546,7 +547,7 @@ _sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 	   call it and ignore errors.  */
 	old_fs = get_fs();
 	set_fs (KERNEL_DS);
-	do_sigaltstack(&st, NULL, regs.regs[29]);
+	do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
 	set_fs (old_fs);
 
 	/*
@@ -564,7 +565,7 @@ badframe:
 }
 
 static inline int setup_sigcontext32(struct pt_regs *regs,
-				     struct sigcontext32 *sc)
+				     struct sigcontext32 __user *sc)
 {
 	int err = 0;
 
@@ -623,8 +624,9 @@ out:
 /*
  * Determine which stack to use..
  */
-static inline void *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
-				 size_t frame_size)
+static inline void __user *get_sigframe(struct k_sigaction *ka,
+					struct pt_regs *regs,
+					size_t frame_size)
 {
 	unsigned long sp;
 
@@ -642,13 +644,13 @@ static inline void *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
 	if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0))
 		sp = current->sas_ss_sp + current->sas_ss_size;
 
-	return (void *)((sp - frame_size) & ALMASK);
+	return (void __user *)((sp - frame_size) & ALMASK);
 }
 
 int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
 	int signr, sigset_t *set)
 {
-	struct sigframe *frame;
+	struct sigframe __user *frame;
 	int err = 0;
 
 	frame = get_sigframe(ka, regs, sizeof(*frame));
@@ -692,17 +694,17 @@ int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
 	       current->comm, current->pid,
 	       frame, regs->cp0_epc, frame->sf_code);
 #endif
-	return 1;
+	return 0;
 
 give_sigsegv:
 	force_sigsegv(signr, current);
-	return 0;
+	return -EFAULT;
 }
 
 int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
 	int signr, sigset_t *set, siginfo_t *info)
 {
-	struct rt_sigframe32 *frame;
+	struct rt_sigframe32 __user *frame;
 	int err = 0;
 	s32 sp;
 
@@ -763,11 +765,11 @@ int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
 	       current->comm, current->pid,
 	       frame, regs->cp0_epc, frame->rs_code);
 #endif
-	return 1;
+	return 0;
 
 give_sigsegv:
 	force_sigsegv(signr, current);
-	return 0;
+	return -EFAULT;
 }
 
 static inline int handle_signal(unsigned long sig, siginfo_t *info,
@@ -855,7 +857,7 @@ no_signal:
 }
 
 asmlinkage int sys32_rt_sigaction(int sig, const struct sigaction32 *act,
-				  struct sigaction32 *oact,
+				  struct sigaction32 __user *oact,
 				  unsigned int sigsetsize)
 {
 	struct k_sigaction new_sa, old_sa;
@@ -872,7 +874,7 @@ asmlinkage int sys32_rt_sigaction(int sig, const struct sigaction32 *act,
 		if (!access_ok(VERIFY_READ, act, sizeof(*act)))
 			return -EFAULT;
 		err |= __get_user(handler, &act->sa_handler);
-		new_sa.sa.sa_handler = (void*)(s64)handler;
+		new_sa.sa.sa_handler = (void __user *)(s64)handler;
 		err |= __get_user(new_sa.sa.sa_flags, &act->sa_flags);
 		err |= get_sigset(&new_sa.sa.sa_mask, &act->sa_mask);
 		if (err)
@@ -899,7 +901,7 @@ out:
 }
 
 asmlinkage int sys32_rt_sigprocmask(int how, compat_sigset_t *set,
-	compat_sigset_t *oset, unsigned int sigsetsize)
+	compat_sigset_t __user *oset, unsigned int sigsetsize)
 {
 	sigset_t old_set, new_set;
 	int ret;
@@ -909,8 +911,9 @@ asmlinkage int sys32_rt_sigprocmask(int how, compat_sigset_t *set,
 		return -EFAULT;
 
 	set_fs (KERNEL_DS);
-	ret = sys_rt_sigprocmask(how, set ? &new_set : NULL,
-				 oset ? &old_set : NULL, sigsetsize);
+	ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *)&new_set : NULL,
+				 oset ? (sigset_t __user *)&old_set : NULL,
+				 sigsetsize);
 	set_fs (old_fs);
 
 	if (!ret && oset && put_sigset(&old_set, oset))
@@ -919,7 +922,7 @@ asmlinkage int sys32_rt_sigprocmask(int how, compat_sigset_t *set,
 	return ret;
 }
 
-asmlinkage int sys32_rt_sigpending(compat_sigset_t *uset,
+asmlinkage int sys32_rt_sigpending(compat_sigset_t __user *uset,
 	unsigned int sigsetsize)
 {
 	int ret;
@@ -927,7 +930,7 @@ asmlinkage int sys32_rt_sigpending(compat_sigset_t *uset,
 	mm_segment_t old_fs = get_fs();
 
 	set_fs (KERNEL_DS);
-	ret = sys_rt_sigpending(&set, sigsetsize);
+	ret = sys_rt_sigpending((sigset_t __user *)&set, sigsetsize);
 	set_fs (old_fs);
 
 	if (!ret && put_sigset(&set, uset))
@@ -936,7 +939,7 @@ asmlinkage int sys32_rt_sigpending(compat_sigset_t *uset,
 	return ret;
 }
 
-asmlinkage int sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t *uinfo)
+asmlinkage int sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
 {
 	siginfo_t info;
 	int ret;
@@ -946,7 +949,7 @@ asmlinkage int sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t *uinfo)
 	    copy_from_user (info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE))
 		return -EFAULT;
 	set_fs (KERNEL_DS);
-	ret = sys_rt_sigqueueinfo(pid, sig, &info);
+	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
 	set_fs (old_fs);
 	return ret;
 }
diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index ec61b26..384fc4a 100644
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -48,6 +48,8 @@
 #define __NR_N32_rt_sigreturn		6211
 #define __NR_N32_restart_syscall	6214
 
+#define DEBUG_SIG 0
+
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
 /* IRIX compatible stack_t  */
@@ -83,12 +85,12 @@ save_static_function(sysn32_rt_sigreturn);
 __attribute_used__ noinline static void
 _sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 {
-	struct rt_sigframe_n32 *frame;
+	struct rt_sigframe_n32 __user *frame;
 	sigset_t set;
 	stack_t st;
 	s32 sp;
 
-	frame = (struct rt_sigframe_n32 *) regs.regs[29];
+	frame = (struct rt_sigframe_n32 __user *) regs.regs[29];
 	if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
 		goto badframe;
 	if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set)))
@@ -114,7 +116,7 @@ _sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
 
 	/* It is more difficult to avoid calling this function than to
 	   call it and ignore errors.  */
-	do_sigaltstack(&st, NULL, regs.regs[29]);
+	do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]);
 
 	/*
 	 * Don't let your children do this ...
@@ -133,7 +135,7 @@ badframe:
 int setup_rt_frame_n32(struct k_sigaction * ka,
 	struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info)
 {
-	struct rt_sigframe_n32 *frame;
+	struct rt_sigframe_n32 __user *frame;
 	int err = 0;
 	s32 sp;
 
@@ -184,9 +186,9 @@ int setup_rt_frame_n32(struct k_sigaction * ka,
 	       current->comm, current->pid,
 	       frame, regs->cp0_epc, regs->regs[31]);
 #endif
-	return 1;
+	return 0;
 
 give_sigsegv:
 	force_sigsegv(signr, current);
-	return 0;
+	return -EFAULT;
 }
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 3323584..1da2eeb 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -212,12 +212,12 @@ asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
 	int error;
 	char * filename;
 
-	filename = getname((char *) (long)regs.regs[4]);
+	filename = getname((char __user *) (long)regs.regs[4]);
 	error = PTR_ERR(filename);
 	if (IS_ERR(filename))
 		goto out;
-	error = do_execve(filename, (char **) (long)regs.regs[5],
-	                  (char **) (long)regs.regs[6], &regs);
+	error = do_execve(filename, (char __user *__user *) (long)regs.regs[5],
+	                  (char __user *__user *) (long)regs.regs[6], &regs);
 	putname(filename);
 
 out:
@@ -227,7 +227,7 @@ out:
 /*
  * Compacrapability ...
  */
-asmlinkage int sys_uname(struct old_utsname * name)
+asmlinkage int sys_uname(struct old_utsname __user * name)
 {
 	if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
 		return 0;
@@ -237,7 +237,7 @@ asmlinkage int sys_uname(struct old_utsname * name)
 /*
  * Compacrapability ...
  */
-asmlinkage int sys_olduname(struct oldold_utsname * name)
+asmlinkage int sys_olduname(struct oldold_utsname __user * name)
 {
 	int error;
 
@@ -274,7 +274,7 @@ void sys_set_thread_area(unsigned long addr)
 asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
 {
 	int	tmp, len;
-	char	*name;
+	char	__user *name;
 
 	switch(cmd) {
 	case SETNAME: {
@@ -283,7 +283,7 @@ asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
 		if (!capable(CAP_SYS_ADMIN))
 			return -EPERM;
 
-		name = (char *) arg1;
+		name = (char __user *) arg1;
 
 		len = strncpy_from_user(nodename, name, __NEW_UTS_LEN);
 		if (len < 0)
@@ -324,7 +324,7 @@ asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
  * This is really horribly ugly.
  */
 asmlinkage int sys_ipc (uint call, int first, int second,
-			unsigned long third, void *ptr, long fifth)
+			unsigned long third, void __user *ptr, long fifth)
 {
 	int version, ret;
 
@@ -333,24 +333,25 @@ asmlinkage int sys_ipc (uint call, int first, int second,
 
 	switch (call) {
 	case SEMOP:
-		return sys_semtimedop (first, (struct sembuf *)ptr, second,
-		                       NULL);
+		return sys_semtimedop (first, (struct sembuf __user *)ptr,
+		                       second, NULL);
 	case SEMTIMEDOP:
-		return sys_semtimedop (first, (struct sembuf *)ptr, second,
-		                       (const struct timespec __user *)fifth);
+		return sys_semtimedop (first, (struct sembuf __user *)ptr,
+				       second,
+				       (const struct timespec __user *)fifth);
 	case SEMGET:
 		return sys_semget (first, second, third);
 	case SEMCTL: {
 		union semun fourth;
 		if (!ptr)
 			return -EINVAL;
-		if (get_user(fourth.__pad, (void **) ptr))
+		if (get_user(fourth.__pad, (void *__user *) ptr))
 			return -EFAULT;
 		return sys_semctl (first, second, third, fourth);
 	}
 
 	case MSGSND:
-		return sys_msgsnd (first, (struct msgbuf *) ptr,
+		return sys_msgsnd (first, (struct msgbuf __user *) ptr,
 				   second, third);
 	case MSGRCV:
 		switch (version) {
@@ -360,7 +361,7 @@ asmlinkage int sys_ipc (uint call, int first, int second,
 				return -EINVAL;
 
 			if (copy_from_user(&tmp,
-					   (struct ipc_kludge *) ptr,
+					   (struct ipc_kludge __user *) ptr,
 					   sizeof (tmp)))
 				return -EFAULT;
 			return sys_msgrcv (first, tmp.msgp, second,
@@ -368,35 +369,38 @@ asmlinkage int sys_ipc (uint call, int first, int second,
 		}
 		default:
 			return sys_msgrcv (first,
-					   (struct msgbuf *) ptr,
+					   (struct msgbuf __user *) ptr,
 					   second, fifth, third);
 		}
 	case MSGGET:
 		return sys_msgget ((key_t) first, second);
 	case MSGCTL:
-		return sys_msgctl (first, second, (struct msqid_ds *) ptr);
+		return sys_msgctl (first, second,
+				   (struct msqid_ds __user *) ptr);
 
 	case SHMAT:
 		switch (version) {
 		default: {
 			ulong raddr;
-			ret = do_shmat (first, (char *) ptr, second, &raddr);
+			ret = do_shmat (first, (char __user *) ptr, second,
+					&raddr);
 			if (ret)
 				return ret;
-			return put_user (raddr, (ulong *) third);
+			return put_user (raddr, (ulong __user *) third);
 		}
 		case 1:	/* iBCS2 emulator entry point */
 			if (!segment_eq(get_fs(), get_ds()))
 				return -EINVAL;
-			return do_shmat (first, (char *) ptr, second, (ulong *) third);
+			return do_shmat (first, (char __user *) ptr, second,
+					 (ulong *) third);
 		}
 	case SHMDT:
-		return sys_shmdt ((char *)ptr);
+		return sys_shmdt ((char __user *)ptr);
 	case SHMGET:
 		return sys_shmget (first, second, third);
 	case SHMCTL:
 		return sys_shmctl (first, second,
-				   (struct shmid_ds *) ptr);
+				   (struct shmid_ds __user *) ptr);
 	default:
 		return -ENOSYS;
 	}
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 59a1879..c9d2b51 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1168,7 +1168,7 @@ void __init per_cpu_trap_init(void)
 #endif
 	if (current_cpu_data.isa_level == MIPS_CPU_ISA_IV)
 		status_set |= ST0_XX;
-	change_c0_status(ST0_CU|ST0_MX|ST0_FR|ST0_BEV|ST0_TS|ST0_KX|ST0_SX|ST0_UX,
+	change_c0_status(ST0_CU|ST0_MX|ST0_RE|ST0_FR|ST0_BEV|ST0_TS|ST0_KX|ST0_SX|ST0_UX,
 			 status_set);
 
 	if (cpu_has_dsp)
diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index 25cc856..ff699db 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -1,4 +1,5 @@
 #include <linux/config.h>
+#include <asm/asm-offsets.h>
 #include <asm-generic/vmlinux.lds.h>
 
 #undef mips		/* CPP really sucks for this job  */
@@ -64,10 +65,10 @@ SECTIONS
      we can shorten the on-disk segment size.  */
   .sdata     : { *(.sdata) }
 
-  . = ALIGN(4096);
+  . = ALIGN(_PAGE_SIZE);
   __nosave_begin = .;
   .data_nosave : { *(.data.nosave) }
-  . = ALIGN(4096);
+  . = ALIGN(_PAGE_SIZE);
   __nosave_end = .;
 
   . = ALIGN(32);
@@ -76,7 +77,7 @@ SECTIONS
   _edata =  .;			/* End of data section */
 
   /* will be freed after init */
-  . = ALIGN(4096);		/* Init code and data */
+  . = ALIGN(_PAGE_SIZE);		/* Init code and data */
   __init_begin = .;
   .init.text : {
 	_sinittext = .;
@@ -105,7 +106,7 @@ SECTIONS
   .con_initcall.init : { *(.con_initcall.init) }
   __con_initcall_end = .;
   SECURITY_INIT
-  . = ALIGN(4096);
+  . = ALIGN(_PAGE_SIZE);
   __initramfs_start = .;
   .init.ramfs : { *(.init.ramfs) }
   __initramfs_end = .;
@@ -113,7 +114,7 @@ SECTIONS
   __per_cpu_start = .;
   .data.percpu  : { *(.data.percpu) }
   __per_cpu_end = .;
-  . = ALIGN(4096);
+  . = ALIGN(_PAGE_SIZE);
   __init_end = .;
   /* freed after init ends here */