Merge commit 'v2.6.34-rc6' into core/locking

17 files changed, 174 insertions, 321 deletions

diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index ef20957ca14..7a6ac501cbb 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -6,7 +6,7 @@ extra-y		:= head.o init_task.o vmlinux.lds
 
 obj-y		+= cpu-probe.o branch.o entry.o genex.o irq.o process.o \
 		   ptrace.o reset.o setup.o signal.o syscall.o \
-		   time.o topology.o traps.o unaligned.o watch.o
+		   time.o topology.o traps.o unaligned.o watch.o vdso.o
 
 ifdef CONFIG_FUNCTION_TRACER
 CFLAGS_REMOVE_ftrace.o = -pg
diff --git a/arch/mips/kernel/cpufreq/loongson2_clock.c b/arch/mips/kernel/cpufreq/loongson2_clock.c
index d7ca256e33e..cefc6e259ba 100644
--- a/arch/mips/kernel/cpufreq/loongson2_clock.c
+++ b/arch/mips/kernel/cpufreq/loongson2_clock.c
@@ -164,3 +164,7 @@ void loongson2_cpu_wait(void)
 	spin_unlock_irqrestore(&loongson2_wait_lock, flags);
 }
 EXPORT_SYMBOL_GPL(loongson2_cpu_wait);
+
+MODULE_AUTHOR("Yanhua <yanh@lemote.com>");
+MODULE_DESCRIPTION("cpufreq driver for Loongson 2F");
+MODULE_LICENSE("GPL");
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index 981f86c2616..c6345f579a8 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -15,7 +15,6 @@
 #include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/proc_fs.h>
-#include <linux/slab.h>
 #include <linux/mm.h>
 #include <linux/random.h>
 #include <linux/sched.h>
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index bde79ef602e..c2dab140dc9 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -15,7 +15,6 @@
 #include <linux/time.h>
 #include <linux/times.h>
 #include <linux/poll.h>
-#include <linux/slab.h>
 #include <linux/skbuff.h>
 #include <linux/filter.h>
 #include <linux/shm.h>
@@ -34,6 +33,7 @@
 #include <linux/compat.h>
 #include <linux/vfs.h>
 #include <linux/ipc.h>
+#include <linux/slab.h>
 
 #include <net/sock.h>
 #include <net/scm.h>
@@ -249,22 +249,6 @@ SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz,
 }
 #endif
 
-SYSCALL_DEFINE1(32_newuname, struct new_utsname __user *, name)
-{
-	int ret = 0;
-
-	down_read(&uts_sem);
-	if (copy_to_user(name, utsname(), sizeof *name))
-		ret = -EFAULT;
-	up_read(&uts_sem);
-
-	if (current->personality == PER_LINUX32 && !ret)
-		if (copy_to_user(name->machine, "mips\0\0\0", 8))
-			ret = -EFAULT;
-
-	return ret;
-}
-
 SYSCALL_DEFINE1(32_personality, unsigned long, personality)
 {
 	int ret;
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index f3d73e1831c..99960940d4a 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -17,7 +17,6 @@
 #include <linux/stddef.h>
 #include <linux/unistd.h>
 #include <linux/ptrace.h>
-#include <linux/slab.h>
 #include <linux/mman.h>
 #include <linux/personality.h>
 #include <linux/sys.h>
@@ -64,8 +63,13 @@ void __noreturn cpu_idle(void)
 
 			smtc_idle_loop_hook();
 #endif
-			if (cpu_wait)
+
+			if (cpu_wait) {
+				/* Don't trace irqs off for idle */
+				stop_critical_timings();
 				(*cpu_wait)();
+				start_critical_timings();
+			}
 		}
 #ifdef CONFIG_HOTPLUG_CPU
 		if (!cpu_online(cpu) && !cpu_isset(cpu, cpu_callin_map) &&
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 054861ccb4d..c51b95ff864 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -493,36 +493,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 		ret = ptrace_setfpregs(child, (__u32 __user *) data);
 		break;
 
-	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
-	case PTRACE_CONT: { /* restart after signal. */
-		ret = -EIO;
-		if (!valid_signal(data))
-			break;
-		if (request == PTRACE_SYSCALL) {
-			set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-		}
-		else {
-			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-		}
-		child->exit_code = data;
-		wake_up_process(child);
-		ret = 0;
-		break;
-	}
-
-	/*
-	 * make the child exit.  Best I can do is send it a sigkill.
-	 * perhaps it should be put in the status that it wants to
-	 * exit.
-	 */
-	case PTRACE_KILL:
-		ret = 0;
-		if (child->exit_state == EXIT_ZOMBIE)	/* already dead */
-			break;
-		child->exit_code = SIGKILL;
-		wake_up_process(child);
-		break;
-
 	case PTRACE_GET_THREAD_AREA:
 		ret = put_user(task_thread_info(child)->tp_value,
 				(unsigned long __user *) data);
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index dcaed1bbbfe..26f9b9ab19c 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -23,7 +23,6 @@
 #include <linux/fs.h>
 #include <linux/init.h>
 #include <asm/uaccess.h>
-#include <linux/slab.h>
 #include <linux/list.h>
 #include <linux/vmalloc.h>
 #include <linux/elf.h>
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 66b5a48676d..44337ba0371 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -181,7 +181,7 @@ EXPORT(sysn32_call_table)
 	PTR	sys_exit
 	PTR	compat_sys_wait4
 	PTR	sys_kill			/* 6060 */
-	PTR	sys_32_newuname
+	PTR	sys_newuname
 	PTR	sys_semget
 	PTR	sys_semop
 	PTR	sys_n32_semctl
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 515f9eab2b2..813689ef238 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -325,7 +325,7 @@ sys_call_table:
 	PTR	sys32_sigreturn
 	PTR	sys32_clone			/* 4120 */
 	PTR	sys_setdomainname
-	PTR	sys_32_newuname
+	PTR	sys_newuname
 	PTR	sys_ni_syscall			/* sys_modify_ldt */
 	PTR	compat_sys_adjtimex
 	PTR	sys_mprotect			/* 4125 */
diff --git a/arch/mips/kernel/signal-common.h b/arch/mips/kernel/signal-common.h
index 6c8e8c4246f..10263b40598 100644
--- a/arch/mips/kernel/signal-common.h
+++ b/arch/mips/kernel/signal-common.h
@@ -26,11 +26,6 @@
  */
 extern void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
 				 size_t frame_size);
-/*
- * install trampoline code to get back from the sig handler
- */
-extern int install_sigtramp(unsigned int __user *tramp, unsigned int syscall);
-
 /* Check and clear pending FPU exceptions in saved CSR */
 extern int fpcsr_pending(unsigned int __user *fpcsr);
 
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index d0c68b5d717..2099d5a4c4b 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -32,6 +32,7 @@
 #include <asm/ucontext.h>
 #include <asm/cpu-features.h>
 #include <asm/war.h>
+#include <asm/vdso.h>
 
 #include "signal-common.h"
 
@@ -44,47 +45,20 @@ extern asmlinkage int _restore_fp_context(struct sigcontext __user *sc);
 extern asmlinkage int fpu_emulator_save_context(struct sigcontext __user *sc);
 extern asmlinkage int fpu_emulator_restore_context(struct sigcontext __user *sc);
 
-/*
- * Horribly complicated - with the bloody RM9000 workarounds enabled
- * the signal trampolines is moving to the end of the structure so we can
- * increase the alignment without breaking software compatibility.
- */
-#if ICACHE_REFILLS_WORKAROUND_WAR == 0
-
 struct sigframe {
 	u32 sf_ass[4];		/* argument save space for o32 */
-	u32 sf_code[2];		/* signal trampoline */
+	u32 sf_pad[2];		/* Was: signal trampoline */
 	struct sigcontext sf_sc;
 	sigset_t sf_mask;
 };
 
 struct rt_sigframe {
 	u32 rs_ass[4];		/* argument save space for o32 */
-	u32 rs_code[2];		/* signal trampoline */
+	u32 rs_pad[2];		/* Was: signal trampoline */
 	struct siginfo rs_info;
 	struct ucontext rs_uc;
 };
 
-#else
-
-struct sigframe {
-	u32 sf_ass[4];			/* argument save space for o32 */
-	u32 sf_pad[2];
-	struct sigcontext sf_sc;	/* hw context */
-	sigset_t sf_mask;
-	u32 sf_code[8] ____cacheline_aligned;	/* signal trampoline */
-};
-
-struct rt_sigframe {
-	u32 rs_ass[4];			/* argument save space for o32 */
-	u32 rs_pad[2];
-	struct siginfo rs_info;
-	struct ucontext rs_uc;
-	u32 rs_code[8] ____cacheline_aligned;	/* signal trampoline */
-};
-
-#endif
-
 /*
  * Helper routines
  */
@@ -266,32 +240,6 @@ void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
 	return (void __user *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? ~(cpu_icache_line_size()-1) : ALMASK));
 }
 
-int install_sigtramp(unsigned int __user *tramp, unsigned int syscall)
-{
-	int err;
-
-	/*
-	 * Set up the return code ...
-	 *
-	 *         li      v0, __NR__foo_sigreturn
-	 *         syscall
-	 */
-
-	err = __put_user(0x24020000 + syscall, tramp + 0);
-	err |= __put_user(0x0000000c         , tramp + 1);
-	if (ICACHE_REFILLS_WORKAROUND_WAR) {
-		err |= __put_user(0, tramp + 2);
-		err |= __put_user(0, tramp + 3);
-		err |= __put_user(0, tramp + 4);
-		err |= __put_user(0, tramp + 5);
-		err |= __put_user(0, tramp + 6);
-		err |= __put_user(0, tramp + 7);
-	}
-	flush_cache_sigtramp((unsigned long) tramp);
-
-	return err;
-}
-
 /*
  * Atomically swap in the new signal mask, and wait for a signal.
  */
@@ -484,8 +432,8 @@ badframe:
 }
 
 #ifdef CONFIG_TRAD_SIGNALS
-static int setup_frame(struct k_sigaction * ka, struct pt_regs *regs,
-	int signr, sigset_t *set)
+static int setup_frame(void *sig_return, struct k_sigaction *ka,
+		       struct pt_regs *regs, int signr, sigset_t *set)
 {
 	struct sigframe __user *frame;
 	int err = 0;
@@ -494,8 +442,6 @@ static int setup_frame(struct k_sigaction * ka, struct pt_regs *regs,
 	if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
 		goto give_sigsegv;
 
-	err |= install_sigtramp(frame->sf_code, __NR_sigreturn);
-
 	err |= setup_sigcontext(regs, &frame->sf_sc);
 	err |= __copy_to_user(&frame->sf_mask, set, sizeof(*set));
 	if (err)
@@ -515,7 +461,7 @@ static int setup_frame(struct k_sigaction * ka, struct pt_regs *regs,
 	regs->regs[ 5] = 0;
 	regs->regs[ 6] = (unsigned long) &frame->sf_sc;
 	regs->regs[29] = (unsigned long) frame;
-	regs->regs[31] = (unsigned long) frame->sf_code;
+	regs->regs[31] = (unsigned long) sig_return;
 	regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
 
 	DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
@@ -529,8 +475,9 @@ give_sigsegv:
 }
 #endif
 
-static int setup_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
-	int signr, sigset_t *set, siginfo_t *info)
+static int setup_rt_frame(void *sig_return, struct k_sigaction *ka,
+			  struct pt_regs *regs,	int signr, sigset_t *set,
+			  siginfo_t *info)
 {
 	struct rt_sigframe __user *frame;
 	int err = 0;
@@ -539,8 +486,6 @@ static int setup_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
 	if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
 		goto give_sigsegv;
 
-	err |= install_sigtramp(frame->rs_code, __NR_rt_sigreturn);
-
 	/* Create siginfo.  */
 	err |= copy_siginfo_to_user(&frame->rs_info, info);
 
@@ -573,7 +518,7 @@ static int setup_rt_frame(struct k_sigaction * ka, struct pt_regs *regs,
 	regs->regs[ 5] = (unsigned long) &frame->rs_info;
 	regs->regs[ 6] = (unsigned long) &frame->rs_uc;
 	regs->regs[29] = (unsigned long) frame;
-	regs->regs[31] = (unsigned long) frame->rs_code;
+	regs->regs[31] = (unsigned long) sig_return;
 	regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
 
 	DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
@@ -590,8 +535,11 @@ give_sigsegv:
 struct mips_abi mips_abi = {
 #ifdef CONFIG_TRAD_SIGNALS
 	.setup_frame	= setup_frame,
+	.signal_return_offset = offsetof(struct mips_vdso, signal_trampoline),
 #endif
 	.setup_rt_frame	= setup_rt_frame,
+	.rt_signal_return_offset =
+		offsetof(struct mips_vdso, rt_signal_trampoline),
 	.restart	= __NR_restart_syscall
 };
 
@@ -599,6 +547,8 @@ static int handle_signal(unsigned long sig, siginfo_t *info,
 	struct k_sigaction *ka, sigset_t *oldset, struct pt_regs *regs)
 {
 	int ret;
+	struct mips_abi *abi = current->thread.abi;
+	void *vdso = current->mm->context.vdso;
 
 	switch(regs->regs[0]) {
 	case ERESTART_RESTARTBLOCK:
@@ -619,9 +569,11 @@ static int handle_signal(unsigned long sig, siginfo_t *info,
 	regs->regs[0] = 0;		/* Don't deal with this again.  */
 
 	if (sig_uses_siginfo(ka))
-		ret = current->thread.abi->setup_rt_frame(ka, regs, sig, oldset, info);
+		ret = abi->setup_rt_frame(vdso + abi->rt_signal_return_offset,
+					  ka, regs, sig, oldset, info);
 	else
-		ret = current->thread.abi->setup_frame(ka, regs, sig, oldset);
+		ret = abi->setup_frame(vdso + abi->signal_return_offset,
+				       ka, regs, sig, oldset);
 
 	spin_lock_irq(&current->sighand->siglock);
 	sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 03abaf048f0..a0ed0e052b2 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -32,6 +32,7 @@
 #include <asm/system.h>
 #include <asm/fpu.h>
 #include <asm/war.h>
+#include <asm/vdso.h>
 
 #include "signal-common.h"
 
@@ -47,8 +48,6 @@ extern asmlinkage int fpu_emulator_restore_context32(struct sigcontext32 __user
 /*
  * Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
  */
-#define __NR_O32_sigreturn		4119
-#define __NR_O32_rt_sigreturn		4193
 #define __NR_O32_restart_syscall        4253
 
 /* 32-bit compatibility types */
@@ -77,47 +76,20 @@ struct ucontext32 {
 	compat_sigset_t     uc_sigmask;   /* mask last for extensibility */
 };
 
-/*
- * Horribly complicated - with the bloody RM9000 workarounds enabled
- * the signal trampolines is moving to the end of the structure so we can
- * increase the alignment without breaking software compatibility.
- */
-#if ICACHE_REFILLS_WORKAROUND_WAR == 0
-
 struct sigframe32 {
 	u32 sf_ass[4];		/* argument save space for o32 */
-	u32 sf_code[2];		/* signal trampoline */
+	u32 sf_pad[2];		/* Was: signal trampoline */
 	struct sigcontext32 sf_sc;
 	compat_sigset_t sf_mask;
 };
 
 struct rt_sigframe32 {
 	u32 rs_ass[4];			/* argument save space for o32 */
-	u32 rs_code[2];			/* signal trampoline */
+	u32 rs_pad[2];			/* Was: signal trampoline */
 	compat_siginfo_t rs_info;
 	struct ucontext32 rs_uc;
 };
 
-#else  /* ICACHE_REFILLS_WORKAROUND_WAR */
-
-struct sigframe32 {
-	u32 sf_ass[4];			/* argument save space for o32 */
-	u32 sf_pad[2];
-	struct sigcontext32 sf_sc;	/* hw context */
-	compat_sigset_t sf_mask;
-	u32 sf_code[8] ____cacheline_aligned;	/* signal trampoline */
-};
-
-struct rt_sigframe32 {
-	u32 rs_ass[4];			/* argument save space for o32 */
-	u32 rs_pad[2];
-	compat_siginfo_t rs_info;
-	struct ucontext32 rs_uc;
-	u32 rs_code[8] __attribute__((aligned(32)));	/* signal trampoline */
-};
-
-#endif	/* !ICACHE_REFILLS_WORKAROUND_WAR */
-
 /*
  * sigcontext handlers
  */
@@ -598,8 +570,8 @@ badframe:
 	force_sig(SIGSEGV, current);
 }
 
-static int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
-	int signr, sigset_t *set)
+static int setup_frame_32(void *sig_return, struct k_sigaction *ka,
+			  struct pt_regs *regs, int signr, sigset_t *set)
 {
 	struct sigframe32 __user *frame;
 	int err = 0;
@@ -608,8 +580,6 @@ static int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
 	if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
 		goto give_sigsegv;
 
-	err |= install_sigtramp(frame->sf_code, __NR_O32_sigreturn);
-
 	err |= setup_sigcontext32(regs, &frame->sf_sc);
 	err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
 
@@ -630,7 +600,7 @@ static int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
 	regs->regs[ 5] = 0;
 	regs->regs[ 6] = (unsigned long) &frame->sf_sc;
 	regs->regs[29] = (unsigned long) frame;
-	regs->regs[31] = (unsigned long) frame->sf_code;
+	regs->regs[31] = (unsigned long) sig_return;
 	regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
 
 	DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
@@ -644,8 +614,9 @@ give_sigsegv:
 	return -EFAULT;
 }
 
-static int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
-	int signr, sigset_t *set, siginfo_t *info)
+static int setup_rt_frame_32(void *sig_return, struct k_sigaction *ka,
+			     struct pt_regs *regs, int signr, sigset_t *set,
+			     siginfo_t *info)
 {
 	struct rt_sigframe32 __user *frame;
 	int err = 0;
@@ -655,8 +626,6 @@ static int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
 	if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
 		goto give_sigsegv;
 
-	err |= install_sigtramp(frame->rs_code, __NR_O32_rt_sigreturn);
-
 	/* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */
 	err |= copy_siginfo_to_user32(&frame->rs_info, info);
 
@@ -690,7 +659,7 @@ static int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs,
 	regs->regs[ 5] = (unsigned long) &frame->rs_info;
 	regs->regs[ 6] = (unsigned long) &frame->rs_uc;
 	regs->regs[29] = (unsigned long) frame;
-	regs->regs[31] = (unsigned long) frame->rs_code;
+	regs->regs[31] = (unsigned long) sig_return;
 	regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
 
 	DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
@@ -709,7 +678,11 @@ give_sigsegv:
  */
 struct mips_abi mips_abi_32 = {
 	.setup_frame	= setup_frame_32,
+	.signal_return_offset =
+		offsetof(struct mips_vdso, o32_signal_trampoline),
 	.setup_rt_frame	= setup_rt_frame_32,
+	.rt_signal_return_offset =
+		offsetof(struct mips_vdso, o32_rt_signal_trampoline),
 	.restart	= __NR_O32_restart_syscall
 };
 
diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index bb277e82d42..2c5df818c65 100644
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -39,13 +39,13 @@
 #include <asm/fpu.h>
 #include <asm/cpu-features.h>
 #include <asm/war.h>
+#include <asm/vdso.h>
 
 #include "signal-common.h"
 
 /*
  * Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
  */
-#define __NR_N32_rt_sigreturn		6211
 #define __NR_N32_restart_syscall	6214
 
 extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *);
@@ -67,27 +67,13 @@ struct ucontextn32 {
 	compat_sigset_t     uc_sigmask;   /* mask last for extensibility */
 };
 
-#if ICACHE_REFILLS_WORKAROUND_WAR == 0
-
-struct rt_sigframe_n32 {
-	u32 rs_ass[4];			/* argument save space for o32 */
-	u32 rs_code[2];			/* signal trampoline */
-	struct compat_siginfo rs_info;
-	struct ucontextn32 rs_uc;
-};
-
-#else  /* ICACHE_REFILLS_WORKAROUND_WAR */
-
 struct rt_sigframe_n32 {
 	u32 rs_ass[4];			/* argument save space for o32 */
-	u32 rs_pad[2];
+	u32 rs_pad[2];			/* Was: signal trampoline */
 	struct compat_siginfo rs_info;
 	struct ucontextn32 rs_uc;
-	u32 rs_code[8] ____cacheline_aligned;		/* signal trampoline */
 };
 
-#endif	/* !ICACHE_REFILLS_WORKAROUND_WAR */
-
 extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
 
 asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
@@ -173,7 +159,7 @@ badframe:
 	force_sig(SIGSEGV, current);
 }
 
-static int setup_rt_frame_n32(struct k_sigaction * ka,
+static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka,
 	struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info)
 {
 	struct rt_sigframe_n32 __user *frame;
@@ -184,8 +170,6 @@ static int setup_rt_frame_n32(struct k_sigaction * ka,
 	if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
 		goto give_sigsegv;
 
-	install_sigtramp(frame->rs_code, __NR_N32_rt_sigreturn);
-
 	/* Create siginfo.  */
 	err |= copy_siginfo_to_user32(&frame->rs_info, info);
 
@@ -219,7 +203,7 @@ static int setup_rt_frame_n32(struct k_sigaction * ka,
 	regs->regs[ 5] = (unsigned long) &frame->rs_info;
 	regs->regs[ 6] = (unsigned long) &frame->rs_uc;
 	regs->regs[29] = (unsigned long) frame;
-	regs->regs[31] = (unsigned long) frame->rs_code;
+	regs->regs[31] = (unsigned long) sig_return;
 	regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler;
 
 	DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
@@ -235,5 +219,7 @@ give_sigsegv:
 
 struct mips_abi mips_abi_n32 = {
 	.setup_rt_frame	= setup_rt_frame_n32,
+	.rt_signal_return_offset =
+		offsetof(struct mips_vdso, n32_rt_signal_trampoline),
 	.restart	= __NR_N32_restart_syscall
 };
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index 23499b5bd9c..a95dea5459c 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -26,6 +26,7 @@
 #include <linux/kernel_stat.h>
 #include <linux/module.h>
 #include <linux/ftrace.h>
+#include <linux/slab.h>
 
 #include <asm/cpu.h>
 #include <asm/processor.h>
@@ -181,7 +182,7 @@ static int vpemask[2][8] = {
 	{0, 0, 0, 0, 0, 0, 0, 1}
 };
 int tcnoprog[NR_CPUS];
-static atomic_t idle_hook_initialized = {0};
+static atomic_t idle_hook_initialized = ATOMIC_INIT(0);
 static int clock_hang_reported[NR_CPUS];
 
 #endif /* CONFIG_SMTC_IDLE_HOOK_DEBUG */
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 3f7f466190b..dd81b0f8751 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -19,7 +19,6 @@
 #include <linux/string.h>
 #include <linux/syscalls.h>
 #include <linux/file.h>
-#include <linux/slab.h>
 #include <linux/utsname.h>
 #include <linux/unistd.h>
 #include <linux/sem.h>
@@ -29,6 +28,7 @@
 #include <linux/module.h>
 #include <linux/ipc.h>
 #include <linux/uaccess.h>
+#include <linux/slab.h>
 
 #include <asm/asm.h>
 #include <asm/branch.h>
@@ -79,7 +79,11 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
 	int do_color_align;
 	unsigned long task_size;
 
-	task_size = STACK_TOP;
+#ifdef CONFIG_32BIT
+	task_size = TASK_SIZE;
+#else /* Must be CONFIG_64BIT*/
+	task_size = test_thread_flag(TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE;
+#endif
 
 	if (len > task_size)
 		return -ENOMEM;
@@ -215,48 +219,6 @@ out:
 	return error;
 }
 
-/*
- * Compacrapability ...
- */
-SYSCALL_DEFINE1(uname, struct old_utsname __user *, name)
-{
-	if (name && !copy_to_user(name, utsname(), sizeof (*name)))
-		return 0;
-	return -EFAULT;
-}
-
-/*
- * Compacrapability ...
- */
-SYSCALL_DEFINE1(olduname, struct oldold_utsname __user *, name)
-{
-	int error;
-
-	if (!name)
-		return -EFAULT;
-	if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
-		return -EFAULT;
-
-	error = __copy_to_user(&name->sysname, &utsname()->sysname,
-			       __OLD_UTS_LEN);
-	error -= __put_user(0, name->sysname + __OLD_UTS_LEN);
-	error -= __copy_to_user(&name->nodename, &utsname()->nodename,
-				__OLD_UTS_LEN);
-	error -= __put_user(0, name->nodename + __OLD_UTS_LEN);
-	error -= __copy_to_user(&name->release, &utsname()->release,
-				__OLD_UTS_LEN);
-	error -= __put_user(0, name->release + __OLD_UTS_LEN);
-	error -= __copy_to_user(&name->version, &utsname()->version,
-				__OLD_UTS_LEN);
-	error -= __put_user(0, name->version + __OLD_UTS_LEN);
-	error -= __copy_to_user(&name->machine, &utsname()->machine,
-				__OLD_UTS_LEN);
-	error = __put_user(0, name->machine + __OLD_UTS_LEN);
-	error = error ? -EFAULT : 0;
-
-	return error;
-}
-
 SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
 {
 	struct thread_info *ti = task_thread_info(current);
@@ -407,94 +369,6 @@ _sys_sysmips(nabi_no_regargs struct pt_regs regs)
 }
 
 /*
- * sys_ipc() is the de-multiplexer for the SysV IPC calls..
- *
- * This is really horribly ugly.
- */
-SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, int, second,
-	unsigned long, third, void __user *, ptr, long, fifth)
-{
-	int version, ret;
-
-	version = call >> 16; /* hack for backward compatibility */
-	call &= 0xffff;
-
-	switch (call) {
-	case SEMOP:
-		return sys_semtimedop(first, (struct sembuf __user *)ptr,
-		                      second, NULL);
-	case SEMTIMEDOP:
-		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 __user *__user *) ptr))
-			return -EFAULT;
-		return sys_semctl(first, second, third, fourth);
-	}
-
-	case MSGSND:
-		return sys_msgsnd(first, (struct msgbuf __user *) ptr,
-				  second, third);
-	case MSGRCV:
-		switch (version) {
-		case 0: {
-			struct ipc_kludge tmp;
-			if (!ptr)
-				return -EINVAL;
-
-			if (copy_from_user(&tmp,
-					   (struct ipc_kludge __user *) ptr,
-					   sizeof(tmp)))
-				return -EFAULT;
-			return sys_msgrcv(first, tmp.msgp, second,
-					  tmp.msgtyp, third);
-		}
-		default:
-			return sys_msgrcv(first,
-					  (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 __user *) ptr);
-
-	case SHMAT:
-		switch (version) {
-		default: {
-			unsigned long raddr;
-			ret = do_shmat(first, (char __user *) ptr, second,
-				       &raddr);
-			if (ret)
-				return ret;
-			return put_user(raddr, (unsigned long __user *) third);
-		}
-		case 1:	/* iBCS2 emulator entry point */
-			if (!segment_eq(get_fs(), get_ds()))
-				return -EINVAL;
-			return do_shmat(first, (char __user *) ptr, second,
-				        (unsigned long *) third);
-		}
-	case SHMDT:
-		return sys_shmdt((char __user *)ptr);
-	case SHMGET:
-		return sys_shmget(first, second, third);
-	case SHMCTL:
-		return sys_shmctl(first, second,
-				  (struct shmid_ds __user *) ptr);
-	default:
-		return -ENOSYS;
-	}
-}
-
-/*
  * No implemented yet ...
  */
 SYSCALL_DEFINE3(cachectl, char *, addr, int, nbytes, int, op)
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 4e00f9bc23e..1a4dd657ccb 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1599,7 +1599,7 @@ void __init trap_init(void)
 		ebase = (unsigned long)
 			__alloc_bootmem(size, 1 << fls(size), 0);
 	} else {
-		ebase = CAC_BASE;
+		ebase = CKSEG0;
 		if (cpu_has_mips_r2)
 			ebase += (read_c0_ebase() & 0x3ffff000);
 	}
diff --git a/arch/mips/kernel/vdso.c b/arch/mips/kernel/vdso.c
new file mode 100644
index 00000000000..b773c1112b1
--- /dev/null
+++ b/arch/mips/kernel/vdso.c
@@ -0,0 +1,112 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2009, 2010 Cavium Networks, Inc.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/binfmts.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/unistd.h>
+
+#include <asm/vdso.h>
+#include <asm/uasm.h>
+
+/*
+ * Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
+ */
+#define __NR_O32_sigreturn		4119
+#define __NR_O32_rt_sigreturn		4193
+#define __NR_N32_rt_sigreturn		6211
+
+static struct page *vdso_page;
+
+static void __init install_trampoline(u32 *tramp, unsigned int sigreturn)
+{
+	uasm_i_addiu(&tramp, 2, 0, sigreturn);	/* li v0, sigreturn */
+	uasm_i_syscall(&tramp, 0);
+}
+
+static int __init init_vdso(void)
+{
+	struct mips_vdso *vdso;
+
+	vdso_page = alloc_page(GFP_KERNEL);
+	if (!vdso_page)
+		panic("Cannot allocate vdso");
+
+	vdso = vmap(&vdso_page, 1, 0, PAGE_KERNEL);
+	if (!vdso)
+		panic("Cannot map vdso");
+	clear_page(vdso);
+
+	install_trampoline(vdso->rt_signal_trampoline, __NR_rt_sigreturn);
+#ifdef CONFIG_32BIT
+	install_trampoline(vdso->signal_trampoline, __NR_sigreturn);
+#else
+	install_trampoline(vdso->n32_rt_signal_trampoline,
+			   __NR_N32_rt_sigreturn);
+	install_trampoline(vdso->o32_signal_trampoline, __NR_O32_sigreturn);
+	install_trampoline(vdso->o32_rt_signal_trampoline,
+			   __NR_O32_rt_sigreturn);
+#endif
+
+	vunmap(vdso);
+
+	pr_notice("init_vdso successfull\n");
+
+	return 0;
+}
+device_initcall(init_vdso);
+
+static unsigned long vdso_addr(unsigned long start)
+{
+	return STACK_TOP;
+}
+
+int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
+{
+	int ret;
+	unsigned long addr;
+	struct mm_struct *mm = current->mm;
+
+	down_write(&mm->mmap_sem);
+
+	addr = vdso_addr(mm->start_stack);
+
+	addr = get_unmapped_area(NULL, addr, PAGE_SIZE, 0, 0);
+	if (IS_ERR_VALUE(addr)) {
+		ret = addr;
+		goto up_fail;
+	}
+
+	ret = install_special_mapping(mm, addr, PAGE_SIZE,
+				      VM_READ|VM_EXEC|
+				      VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC|
+				      VM_ALWAYSDUMP,
+				      &vdso_page);
+
+	if (ret)
+		goto up_fail;
+
+	mm->context.vdso = (void *)addr;
+
+up_fail:
+	up_write(&mm->mmap_sem);
+	return ret;
+}
+
+const char *arch_vma_name(struct vm_area_struct *vma)
+{
+	if (vma->vm_mm && vma->vm_start == (long)vma->vm_mm->context.vdso)
+		return "[vdso]";
+	return NULL;
+}