Merge branch 'linus' into x86/memtesttip-x86-memtest-2008-06-16_09.19_Mon

20 files changed, 204 insertions, 118 deletions

diff --git a/arch/sparc64/kernel/dtlb_prot.S b/arch/sparc64/kernel/dtlb_prot.S
index e0a920162604..b2c2c5be281c 100644
--- a/arch/sparc64/kernel/dtlb_prot.S
+++ b/arch/sparc64/kernel/dtlb_prot.S
@@ -1,4 +1,4 @@
-/* $Id: dtlb_prot.S,v 1.22 2001/04/11 23:40:32 davem Exp $
+/*
  * dtlb_prot.S: DTLB protection trap strategy.
  *              This is included directly into the trap table.
  *
diff --git a/arch/sparc64/kernel/ebus.c b/arch/sparc64/kernel/ebus.c
index bc2632274840..c49d0388b793 100644
--- a/arch/sparc64/kernel/ebus.c
+++ b/arch/sparc64/kernel/ebus.c
@@ -1,4 +1,4 @@
-/* $Id: ebus.c,v 1.64 2001/11/08 04:41:33 davem Exp $
+/*
  * ebus.c: PCI to EBus bridge device.
  *
  * Copyright (C) 1997  Eddie C. Dost  (ecd@skynet.be)
diff --git a/arch/sparc64/kernel/etrap.S b/arch/sparc64/kernel/etrap.S
index f25e1da3fd03..29ce489bc188 100644
--- a/arch/sparc64/kernel/etrap.S
+++ b/arch/sparc64/kernel/etrap.S
@@ -1,4 +1,4 @@
-/* $Id: etrap.S,v 1.46 2002/02/09 19:49:30 davem Exp $
+/*
  * etrap.S: Preparing for entry into the kernel on Sparc V9.
  *
  * Copyright (C) 1996, 1997 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/kernel/idprom.c b/arch/sparc64/kernel/idprom.c
index 3b6789e09a72..5b45a808c621 100644
--- a/arch/sparc64/kernel/idprom.c
+++ b/arch/sparc64/kernel/idprom.c
@@ -1,4 +1,4 @@
-/* $Id: idprom.c,v 1.3 1999/08/31 06:54:53 davem Exp $
+/*
  * idprom.c: Routines to load the idprom into kernel addresses and
  *           interpret the data contained within.
  *
diff --git a/arch/sparc64/kernel/init_task.c b/arch/sparc64/kernel/init_task.c
index 90007cf88bac..d2b312381c19 100644
--- a/arch/sparc64/kernel/init_task.c
+++ b/arch/sparc64/kernel/init_task.c
@@ -10,7 +10,6 @@
 #include <asm/processor.h>
 
 static struct fs_struct init_fs = INIT_FS;
-static struct files_struct init_files = INIT_FILES;
 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
 struct mm_struct init_mm = INIT_MM(init_mm);
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
index 4129c0449856..2084f81a76e1 100644
--- a/arch/sparc64/kernel/process.c
+++ b/arch/sparc64/kernel/process.c
@@ -1,6 +1,6 @@
 /*  arch/sparc64/kernel/process.c
  *
- *  Copyright (C) 1995, 1996 David S. Miller (davem@caip.rutgers.edu)
+ *  Copyright (C) 1995, 1996, 2008 David S. Miller (davem@davemloft.net)
  *  Copyright (C) 1996       Eddie C. Dost   (ecd@skynet.be)
  *  Copyright (C) 1997, 1998 Jakub Jelinek   (jj@sunsite.mff.cuni.cz)
  */
@@ -30,6 +30,7 @@
 #include <linux/init.h>
 #include <linux/cpu.h>
 #include <linux/elfcore.h>
+#include <linux/sysrq.h>
 
 #include <asm/oplib.h>
 #include <asm/uaccess.h>
@@ -49,6 +50,8 @@
 #include <asm/sstate.h>
 #include <asm/reboot.h>
 #include <asm/syscalls.h>
+#include <asm/irq_regs.h>
+#include <asm/smp.h>
 
 /* #define VERBOSE_SHOWREGS */
 
@@ -298,6 +301,118 @@ void show_regs(struct pt_regs *regs)
 #endif
 }
 
+#ifdef CONFIG_MAGIC_SYSRQ
+struct global_reg_snapshot global_reg_snapshot[NR_CPUS];
+static DEFINE_SPINLOCK(global_reg_snapshot_lock);
+
+static void __global_reg_self(struct thread_info *tp, struct pt_regs *regs,
+			      int this_cpu)
+{
+	flushw_all();
+
+	global_reg_snapshot[this_cpu].tstate = regs->tstate;
+	global_reg_snapshot[this_cpu].tpc = regs->tpc;
+	global_reg_snapshot[this_cpu].tnpc = regs->tnpc;
+	global_reg_snapshot[this_cpu].o7 = regs->u_regs[UREG_I7];
+
+	if (regs->tstate & TSTATE_PRIV) {
+		struct reg_window *rw;
+
+		rw = (struct reg_window *)
+			(regs->u_regs[UREG_FP] + STACK_BIAS);
+		global_reg_snapshot[this_cpu].i7 = rw->ins[6];
+	} else
+		global_reg_snapshot[this_cpu].i7 = 0;
+
+	global_reg_snapshot[this_cpu].thread = tp;
+}
+
+/* In order to avoid hangs we do not try to synchronize with the
+ * global register dump client cpus.  The last store they make is to
+ * the thread pointer, so do a short poll waiting for that to become
+ * non-NULL.
+ */
+static void __global_reg_poll(struct global_reg_snapshot *gp)
+{
+	int limit = 0;
+
+	while (!gp->thread && ++limit < 100) {
+		barrier();
+		udelay(1);
+	}
+}
+
+static void sysrq_handle_globreg(int key, struct tty_struct *tty)
+{
+	struct thread_info *tp = current_thread_info();
+	struct pt_regs *regs = get_irq_regs();
+#ifdef CONFIG_KALLSYMS
+	char buffer[KSYM_SYMBOL_LEN];
+#endif
+	unsigned long flags;
+	int this_cpu, cpu;
+
+	if (!regs)
+		regs = tp->kregs;
+
+	spin_lock_irqsave(&global_reg_snapshot_lock, flags);
+
+	memset(global_reg_snapshot, 0, sizeof(global_reg_snapshot));
+
+	this_cpu = raw_smp_processor_id();
+
+	__global_reg_self(tp, regs, this_cpu);
+
+	smp_fetch_global_regs();
+
+	for_each_online_cpu(cpu) {
+		struct global_reg_snapshot *gp = &global_reg_snapshot[cpu];
+		struct thread_info *tp;
+
+		__global_reg_poll(gp);
+
+		tp = gp->thread;
+		printk("%c CPU[%3d]: TSTATE[%016lx] TPC[%016lx] TNPC[%016lx] TASK[%s:%d]\n",
+		       (cpu == this_cpu ? '*' : ' '), cpu,
+		       gp->tstate, gp->tpc, gp->tnpc,
+		       ((tp && tp->task) ? tp->task->comm : "NULL"),
+		       ((tp && tp->task) ? tp->task->pid : -1));
+#ifdef CONFIG_KALLSYMS
+		if (gp->tstate & TSTATE_PRIV) {
+			sprint_symbol(buffer, gp->tpc);
+			printk("             TPC[%s] ", buffer);
+			sprint_symbol(buffer, gp->o7);
+			printk("O7[%s] ", buffer);
+			sprint_symbol(buffer, gp->i7);
+			printk("I7[%s]\n", buffer);
+		} else
+#endif
+		{
+			printk("             TPC[%lx] O7[%lx] I7[%lx]\n",
+			       gp->tpc, gp->o7, gp->i7);
+		}
+	}
+
+	memset(global_reg_snapshot, 0, sizeof(global_reg_snapshot));
+
+	spin_unlock_irqrestore(&global_reg_snapshot_lock, flags);
+}
+
+static struct sysrq_key_op sparc_globalreg_op = {
+	.handler	= sysrq_handle_globreg,
+	.help_msg	= "Globalregs",
+	.action_msg	= "Show Global CPU Regs",
+};
+
+static int __init sparc_globreg_init(void)
+{
+	return register_sysrq_key('y', &sparc_globalreg_op);
+}
+
+core_initcall(sparc_globreg_init);
+
+#endif
+
 unsigned long thread_saved_pc(struct task_struct *tsk)
 {
 	struct thread_info *ti = task_thread_info(tsk);
@@ -542,20 +657,39 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
 		struct task_struct *p, struct pt_regs *regs)
 {
 	struct thread_info *t = task_thread_info(p);
+	struct sparc_stackf *parent_sf;
+	unsigned long child_stack_sz;
 	char *child_trap_frame;
+	int kernel_thread;
 
-	/* Calculate offset to stack_frame & pt_regs */
-	child_trap_frame = task_stack_page(p) + (THREAD_SIZE - (TRACEREG_SZ+STACKFRAME_SZ));
-	memcpy(child_trap_frame, (((struct sparc_stackf *)regs)-1), (TRACEREG_SZ+STACKFRAME_SZ));
+	kernel_thread = (regs->tstate & TSTATE_PRIV) ? 1 : 0;
+	parent_sf = ((struct sparc_stackf *) regs) - 1;
 
-	t->flags = (t->flags & ~((0xffUL << TI_FLAG_CWP_SHIFT) | (0xffUL << TI_FLAG_CURRENT_DS_SHIFT))) |
+	/* Calculate offset to stack_frame & pt_regs */
+	child_stack_sz = ((STACKFRAME_SZ + TRACEREG_SZ) +
+			  (kernel_thread ? STACKFRAME_SZ : 0));
+	child_trap_frame = (task_stack_page(p) +
+			    (THREAD_SIZE - child_stack_sz));
+	memcpy(child_trap_frame, parent_sf, child_stack_sz);
+
+	t->flags = (t->flags & ~((0xffUL << TI_FLAG_CWP_SHIFT) |
+				 (0xffUL << TI_FLAG_CURRENT_DS_SHIFT))) |
 		(((regs->tstate + 1) & TSTATE_CWP) << TI_FLAG_CWP_SHIFT);
 	t->new_child = 1;
 	t->ksp = ((unsigned long) child_trap_frame) - STACK_BIAS;
-	t->kregs = (struct pt_regs *)(child_trap_frame+sizeof(struct sparc_stackf));
+	t->kregs = (struct pt_regs *) (child_trap_frame +
+				       sizeof(struct sparc_stackf));
 	t->fpsaved[0] = 0;
 
-	if (regs->tstate & TSTATE_PRIV) {
+	if (kernel_thread) {
+		struct sparc_stackf *child_sf = (struct sparc_stackf *)
+			(child_trap_frame + (STACKFRAME_SZ + TRACEREG_SZ));
+
+		/* Zero terminate the stack backtrace.  */
+		child_sf->fp = NULL;
+		t->kregs->u_regs[UREG_FP] =
+		  ((unsigned long) child_sf) - STACK_BIAS;
+
 		/* Special case, if we are spawning a kernel thread from
 		 * a userspace task (via KMOD, NFS, or similar) we must
 		 * disable performance counters in the child because the
@@ -566,12 +700,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
 			t->pcr_reg = 0;
 			t->flags &= ~_TIF_PERFCTR;
 		}
-		t->kregs->u_regs[UREG_FP] = t->ksp;
 		t->flags |= ((long)ASI_P << TI_FLAG_CURRENT_DS_SHIFT);
-		flush_register_windows();
-		memcpy((void *)(t->ksp + STACK_BIAS),
-		       (void *)(regs->u_regs[UREG_FP] + STACK_BIAS),
-		       sizeof(struct sparc_stackf));
 		t->kregs->u_regs[UREG_G6] = (unsigned long) t;
 		t->kregs->u_regs[UREG_G4] = (unsigned long) t->task;
 	} else {
diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S
index b9b785fd8b46..c6fc695fe1fe 100644
--- a/arch/sparc64/kernel/rtrap.S
+++ b/arch/sparc64/kernel/rtrap.S
@@ -1,4 +1,4 @@
-/* $Id: rtrap.S,v 1.61 2002/02/09 19:49:31 davem Exp $
+/*
  * rtrap.S: Preparing for return from trap on Sparc V9.
  *
  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
@@ -46,7 +46,7 @@ __handle_user_windows:
 		wrpr			%g0, RTRAP_PSTATE_IRQOFF, %pstate
 		ldx			[%g6 + TI_FLAGS], %l0
 
-1:		andcc			%l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
+1:		andcc			%l0, _TIF_SIGPENDING, %g0
 		be,pt			%xcc, __handle_user_windows_continue
 		 nop
 		mov			%l5, %o1
@@ -86,7 +86,7 @@ __handle_perfctrs:
 		 wrpr			%g0, RTRAP_PSTATE, %pstate
 		wrpr			%g0, RTRAP_PSTATE_IRQOFF, %pstate
 		ldx			[%g6 + TI_FLAGS], %l0
-1:		andcc			%l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
+1:		andcc			%l0, _TIF_SIGPENDING, %g0
 
 		be,pt			%xcc, __handle_perfctrs_continue
 		 sethi			%hi(TSTATE_PEF), %o0
@@ -195,7 +195,7 @@ __handle_preemption_continue:
 		 andcc			%l1, %o0, %g0
 		andcc			%l0, _TIF_NEED_RESCHED, %g0
 		bne,pn			%xcc, __handle_preemption
-		 andcc			%l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
+		 andcc			%l0, _TIF_SIGPENDING, %g0
 		bne,pn			%xcc, __handle_signal
 __handle_signal_continue:
 		 ldub			[%g6 + TI_WSAVED], %o2
@@ -363,6 +363,7 @@ kern_rtt:	rdpr			%canrestore, %g1
 		brz,pn			%g1, kern_rtt_fill
 		 nop
 kern_rtt_restore:
+		stw			%g0, [%sp + PTREGS_OFF + PT_V9_MAGIC]
 		restore
 		retry
 
diff --git a/arch/sparc64/kernel/sbus.c b/arch/sparc64/kernel/sbus.c
index fa2827c4a3ad..e33a8a660e9e 100644
--- a/arch/sparc64/kernel/sbus.c
+++ b/arch/sparc64/kernel/sbus.c
@@ -1,4 +1,4 @@
-/* $Id: sbus.c,v 1.19 2002/01/23 11:27:32 davem Exp $
+/*
  * sbus.c: UltraSparc SBUS controller support.
  *
  * Copyright (C) 1999 David S. Miller (davem@redhat.com)
diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c
index da5e6ee0c661..c8b03a4f68bf 100644
--- a/arch/sparc64/kernel/setup.c
+++ b/arch/sparc64/kernel/setup.c
@@ -1,4 +1,4 @@
-/*  $Id: setup.c,v 1.72 2002/02/09 19:49:30 davem Exp $
+/*
  *  linux/arch/sparc64/kernel/setup.c
  *
  *  Copyright (C) 1995,1996  David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/kernel/signal.c b/arch/sparc64/kernel/signal.c
index 2378482c2aab..9667e96fd513 100644
--- a/arch/sparc64/kernel/signal.c
+++ b/arch/sparc64/kernel/signal.c
@@ -1,4 +1,4 @@
-/*  $Id: signal.c,v 1.60 2002/02/09 19:49:31 davem Exp $
+/*
  *  arch/sparc64/kernel/signal.c
  *
  *  Copyright (C) 1991, 1992  Linus Torvalds
@@ -247,7 +247,9 @@ static long _sigpause_common(old_sigset_t set)
 
 	current->state = TASK_INTERRUPTIBLE;
 	schedule();
-	set_thread_flag(TIF_RESTORE_SIGMASK);
+
+	set_restore_sigmask();
+
 	return -ERESTARTNOHAND;
 }
 
@@ -537,7 +539,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 	} else
 		restart_syscall = 0;
 
-	if (test_thread_flag(TIF_RESTORE_SIGMASK))
+	if (current_thread_info()->status & TS_RESTORE_SIGMASK)
 		oldset = &current->saved_sigmask;
 	else
 		oldset = &current->blocked;
@@ -566,13 +568,12 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 			syscall_restart(orig_i0, regs, &ka.sa);
 		handle_signal(signr, &ka, &info, oldset, regs);
 
-		/* a signal was successfully delivered; the saved
+		/* 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.
+		 * clear the TS_RESTORE_SIGMASK flag.
 		 */
-		if (test_thread_flag(TIF_RESTORE_SIGMASK))
-			clear_thread_flag(TIF_RESTORE_SIGMASK);
+		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
 		return;
 	}
 	if (restart_syscall &&
@@ -591,17 +592,17 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 		regs->tnpc -= 4;
 	}
 
-	/* if there's no signal to deliver, we just put the saved sigmask
+	/* 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);
+	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
 		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
 	}
 }
 
 void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags)
 {
-	if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+	if (thread_info_flags & _TIF_SIGPENDING)
 		do_signal(regs, orig_i0);
 }
diff --git a/arch/sparc64/kernel/signal32.c b/arch/sparc64/kernel/signal32.c
index 3f19e9af3d1b..97cdd1bf4a10 100644
--- a/arch/sparc64/kernel/signal32.c
+++ b/arch/sparc64/kernel/signal32.c
@@ -788,13 +788,12 @@ void do_signal32(sigset_t *oldset, struct pt_regs * regs,
 			syscall_restart32(orig_i0, regs, &ka.sa);
 		handle_signal32(signr, &ka, &info, oldset, regs);
 
-		/* a signal was successfully delivered; the saved
+		/* 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.
+		 * clear the TS_RESTORE_SIGMASK flag.
 		 */
-		if (test_thread_flag(TIF_RESTORE_SIGMASK))
-			clear_thread_flag(TIF_RESTORE_SIGMASK);
+		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
 		return;
 	}
 	if (restart_syscall &&
@@ -813,11 +812,11 @@ void do_signal32(sigset_t *oldset, struct pt_regs * regs,
 		regs->tnpc -= 4;
 	}
 
-	/* if there's no signal to deliver, we just put the saved sigmask
+	/* 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);
+	if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
+		current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
 		sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
 	}
 }
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c
index 0d6403a630ac..fa63c68a1819 100644
--- a/arch/sparc64/kernel/smp.c
+++ b/arch/sparc64/kernel/smp.c
@@ -900,6 +900,9 @@ extern unsigned long xcall_flush_tlb_mm;
 extern unsigned long xcall_flush_tlb_pending;
 extern unsigned long xcall_flush_tlb_kernel_range;
 extern unsigned long xcall_report_regs;
+#ifdef CONFIG_MAGIC_SYSRQ
+extern unsigned long xcall_fetch_glob_regs;
+#endif
 extern unsigned long xcall_receive_signal;
 extern unsigned long xcall_new_mmu_context_version;
 #ifdef CONFIG_KGDB
@@ -1080,6 +1083,13 @@ void smp_report_regs(void)
 	smp_cross_call(&xcall_report_regs, 0, 0, 0);
 }
 
+#ifdef CONFIG_MAGIC_SYSRQ
+void smp_fetch_global_regs(void)
+{
+	smp_cross_call(&xcall_fetch_glob_regs, 0, 0, 0);
+}
+#endif
+
 /* We know that the window frames of the user have been flushed
  * to the stack before we get here because all callers of us
  * are flush_tlb_*() routines, and these run after flush_cache_*()
diff --git a/arch/sparc64/kernel/stacktrace.c b/arch/sparc64/kernel/stacktrace.c
index 01b52f561af4..c73ce3f4197e 100644
--- a/arch/sparc64/kernel/stacktrace.c
+++ b/arch/sparc64/kernel/stacktrace.c
@@ -19,7 +19,7 @@ void save_stack_trace(struct stack_trace *trace)
 	fp = ksp + STACK_BIAS;
 	thread_base = (unsigned long) tp;
 	do {
-		struct reg_window *rw;
+		struct sparc_stackf *sf;
 		struct pt_regs *regs;
 		unsigned long pc;
 
@@ -28,15 +28,17 @@ void save_stack_trace(struct stack_trace *trace)
 		    fp >= (thread_base + THREAD_SIZE))
 			break;
 
-		rw = (struct reg_window *) fp;
-		regs = (struct pt_regs *) (rw + 1);
+		sf = (struct sparc_stackf *) fp;
+		regs = (struct pt_regs *) (sf + 1);
 
 		if ((regs->magic & ~0x1ff) == PT_REGS_MAGIC) {
+			if (!(regs->tstate & TSTATE_PRIV))
+				break;
 			pc = regs->tpc;
 			fp = regs->u_regs[UREG_I6] + STACK_BIAS;
 		} else {
-			pc = rw->ins[7];
-			fp = rw->ins[6] + STACK_BIAS;
+			pc = sf->callers_pc;
+			fp = (unsigned long)sf->fp + STACK_BIAS;
 		}
 
 		if (trace->skip > 0)
diff --git a/arch/sparc64/kernel/starfire.c b/arch/sparc64/kernel/starfire.c
index b930fee7708a..7461581b3bb9 100644
--- a/arch/sparc64/kernel/starfire.c
+++ b/arch/sparc64/kernel/starfire.c
@@ -1,4 +1,4 @@
-/* $Id: starfire.c,v 1.10 2001/04/14 21:13:45 davem Exp $
+/*
  * starfire.c: Starfire/E10000 support.
  *
  * Copyright (C) 1998 David S. Miller (davem@redhat.com)
diff --git a/arch/sparc64/kernel/sys32.S b/arch/sparc64/kernel/sys32.S
index 010a737908ee..ade18ba0c686 100644
--- a/arch/sparc64/kernel/sys32.S
+++ b/arch/sparc64/kernel/sys32.S
@@ -1,4 +1,4 @@
-/* $Id: sys32.S,v 1.12 2000/03/24 04:17:37 davem Exp $
+/*
  * sys32.S: I-cache tricks for 32-bit compatibility layer simple
  *          conversions.
  *
diff --git a/arch/sparc64/kernel/sys_sparc.c b/arch/sparc64/kernel/sys_sparc.c
index 0dbc941f130e..ac1bff58c1ac 100644
--- a/arch/sparc64/kernel/sys_sparc.c
+++ b/arch/sparc64/kernel/sys_sparc.c
@@ -542,8 +542,7 @@ asmlinkage long sparc64_personality(unsigned long personality)
 	return ret;
 }
 
-int sparc64_mmap_check(unsigned long addr, unsigned long len,
-		unsigned long flags)
+int sparc64_mmap_check(unsigned long addr, unsigned long len)
 {
 	if (test_thread_flag(TIF_32BIT)) {
 		if (len >= STACK_TOP32)
@@ -609,46 +608,19 @@ asmlinkage unsigned long sys64_mremap(unsigned long addr,
 	unsigned long old_len, unsigned long new_len,
 	unsigned long flags, unsigned long new_addr)
 {
-	struct vm_area_struct *vma;
 	unsigned long ret = -EINVAL;
 
 	if (test_thread_flag(TIF_32BIT))
 		goto out;
 	if (unlikely(new_len >= VA_EXCLUDE_START))
 		goto out;
-	if (unlikely(invalid_64bit_range(addr, old_len)))
+	if (unlikely(sparc64_mmap_check(addr, old_len)))
+		goto out;
+	if (unlikely(sparc64_mmap_check(new_addr, new_len)))
 		goto out;
 
 	down_write(&current->mm->mmap_sem);
-	if (flags & MREMAP_FIXED) {
-		if (invalid_64bit_range(new_addr, new_len))
-			goto out_sem;
-	} else if (invalid_64bit_range(addr, new_len)) {
-		unsigned long map_flags = 0;
-		struct file *file = NULL;
-
-		ret = -ENOMEM;
-		if (!(flags & MREMAP_MAYMOVE))
-			goto out_sem;
-
-		vma = find_vma(current->mm, addr);
-		if (vma) {
-			if (vma->vm_flags & VM_SHARED)
-				map_flags |= MAP_SHARED;
-			file = vma->vm_file;
-		}
-
-		/* MREMAP_FIXED checked above. */
-		new_addr = get_unmapped_area(file, addr, new_len,
-				    vma ? vma->vm_pgoff : 0,
-				    map_flags);
-		ret = new_addr;
-		if (new_addr & ~PAGE_MASK)
-			goto out_sem;
-		flags |= MREMAP_FIXED;
-	}
 	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
-out_sem:
 	up_write(&current->mm->mmap_sem);
 out:
 	return ret;       
diff --git a/arch/sparc64/kernel/sys_sparc32.c b/arch/sparc64/kernel/sys_sparc32.c
index 1aa4288125f2..ba5bd626b39e 100644
--- a/arch/sparc64/kernel/sys_sparc32.c
+++ b/arch/sparc64/kernel/sys_sparc32.c
@@ -867,44 +867,15 @@ asmlinkage unsigned long sys32_mremap(unsigned long addr,
 	unsigned long old_len, unsigned long new_len,
 	unsigned long flags, u32 __new_addr)
 {
-	struct vm_area_struct *vma;
 	unsigned long ret = -EINVAL;
 	unsigned long new_addr = __new_addr;
 
-	if (old_len > STACK_TOP32 || new_len > STACK_TOP32)
+	if (unlikely(sparc64_mmap_check(addr, old_len)))
 		goto out;
-	if (addr > STACK_TOP32 - old_len)
+	if (unlikely(sparc64_mmap_check(new_addr, new_len)))
 		goto out;
 	down_write(&current->mm->mmap_sem);
-	if (flags & MREMAP_FIXED) {
-		if (new_addr > STACK_TOP32 - new_len)
-			goto out_sem;
-	} else if (addr > STACK_TOP32 - new_len) {
-		unsigned long map_flags = 0;
-		struct file *file = NULL;
-
-		ret = -ENOMEM;
-		if (!(flags & MREMAP_MAYMOVE))
-			goto out_sem;
-
-		vma = find_vma(current->mm, addr);
-		if (vma) {
-			if (vma->vm_flags & VM_SHARED)
-				map_flags |= MAP_SHARED;
-			file = vma->vm_file;
-		}
-
-		/* MREMAP_FIXED checked above. */
-		new_addr = get_unmapped_area(file, addr, new_len,
-				    vma ? vma->vm_pgoff : 0,
-				    map_flags);
-		ret = new_addr;
-		if (new_addr & ~PAGE_MASK)
-			goto out_sem;
-		flags |= MREMAP_FIXED;
-	}
 	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
-out_sem:
 	up_write(&current->mm->mmap_sem);
 out:
 	return ret;       
diff --git a/arch/sparc64/kernel/trampoline.S b/arch/sparc64/kernel/trampoline.S
index 56ff55211341..704a3afcfd06 100644
--- a/arch/sparc64/kernel/trampoline.S
+++ b/arch/sparc64/kernel/trampoline.S
@@ -1,4 +1,4 @@
-/* $Id: trampoline.S,v 1.26 2002/02/09 19:49:30 davem Exp $
+/*
  * trampoline.S: Jump start slave processors on sparc64.
  *
  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index d9b8d46707d1..369749262653 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -2116,7 +2116,7 @@ void show_stack(struct task_struct *tsk, unsigned long *_ksp)
 	printk("\n");
 #endif
 	do {
-		struct reg_window *rw;
+		struct sparc_stackf *sf;
 		struct pt_regs *regs;
 		unsigned long pc;
 
@@ -2124,15 +2124,17 @@ void show_stack(struct task_struct *tsk, unsigned long *_ksp)
 		if (fp < (thread_base + sizeof(struct thread_info)) ||
 		    fp >= (thread_base + THREAD_SIZE))
 			break;
-		rw = (struct reg_window *)fp;
-		regs = (struct pt_regs *) (rw + 1);
+		sf = (struct sparc_stackf *) fp;
+		regs = (struct pt_regs *) (sf + 1);
 
 		if ((regs->magic & ~0x1ff) == PT_REGS_MAGIC) {
+			if (!(regs->tstate & TSTATE_PRIV))
+				break;
 			pc = regs->tpc;
 			fp = regs->u_regs[UREG_I6] + STACK_BIAS;
 		} else {
-			pc = rw->ins[7];
-			fp = rw->ins[6] + STACK_BIAS;
+			pc = sf->callers_pc;
+			fp = (unsigned long)sf->fp + STACK_BIAS;
 		}
 
 		printk(" [%016lx] ", pc);
diff --git a/arch/sparc64/kernel/unaligned.c b/arch/sparc64/kernel/unaligned.c
index 1a511e9f0d3e..afa7fc4f5193 100644
--- a/arch/sparc64/kernel/unaligned.c
+++ b/arch/sparc64/kernel/unaligned.c
@@ -1,4 +1,4 @@
-/* $Id: unaligned.c,v 1.24 2002/02/09 19:49:31 davem Exp $
+/*
  * unaligned.c: Unaligned load/store trap handling with special
  *              cases for the kernel to do them more quickly.
  *