40 files changed, 225 insertions, 59 deletions

diff --git a/arch/sparc64/Makefile b/arch/sparc64/Makefile
index 9cb75c852b45..4b8f2b084c21 100644
--- a/arch/sparc64/Makefile
+++ b/arch/sparc64/Makefile
@@ -1,4 +1,3 @@
-# $Id: Makefile,v 1.52 2002/02/09 19:49:31 davem Exp $
 # sparc64/Makefile
 #
 # Makefile for the architecture dependent flags and dependencies on the
diff --git a/arch/sparc64/boot/Makefile b/arch/sparc64/boot/Makefile
index 6968a6da57da..0458b5244f09 100644
--- a/arch/sparc64/boot/Makefile
+++ b/arch/sparc64/boot/Makefile
@@ -1,4 +1,3 @@
-# $Id: Makefile,v 1.4 1997/12/15 20:08:56 ecd Exp $
 # Makefile for the Sparc64 boot stuff.
 #
 # Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/boot/piggyback.c b/arch/sparc64/boot/piggyback.c
index 36f907408c60..de364bfed0bb 100644
--- a/arch/sparc64/boot/piggyback.c
+++ b/arch/sparc64/boot/piggyback.c
@@ -1,4 +1,4 @@
-/* $Id: piggyback.c,v 1.2 2000/09/19 14:34:39 anton Exp $
+/*
    Simple utility to make a single-image install kernel with initial ramdisk
    for Sparc64 tftpbooting without need to set up nfs.
    
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 16689b2930db..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)
@@ -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 6e4dc67d16af..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
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/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.
  *
diff --git a/arch/sparc64/lib/PeeCeeI.c b/arch/sparc64/lib/PeeCeeI.c
index 3c6cfbb20360..8b313f11bc8d 100644
--- a/arch/sparc64/lib/PeeCeeI.c
+++ b/arch/sparc64/lib/PeeCeeI.c
@@ -1,4 +1,4 @@
-/* $Id: PeeCeeI.c,v 1.4 1999/09/06 01:17:35 davem Exp $
+/*
  * PeeCeeI.c: The emerging standard...
  *
  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/lib/VISsave.S b/arch/sparc64/lib/VISsave.S
index a0ded5c5aa5c..b320ae9e2e2e 100644
--- a/arch/sparc64/lib/VISsave.S
+++ b/arch/sparc64/lib/VISsave.S
@@ -1,4 +1,4 @@
-/* $Id: VISsave.S,v 1.6 2002/02/09 19:49:30 davem Exp $
+/*
  * VISsave.S: Code for saving FPU register state for
  *            VIS routines. One should not call this directly,
  *            but use macros provided in <asm/visasm.h>.
diff --git a/arch/sparc64/lib/memcmp.S b/arch/sparc64/lib/memcmp.S
index c90ad96c51b9..d3fdaa898566 100644
--- a/arch/sparc64/lib/memcmp.S
+++ b/arch/sparc64/lib/memcmp.S
@@ -1,4 +1,4 @@
-/* $Id: memcmp.S,v 1.3 2000/03/23 07:51:08 davem Exp $
+/*
  * Sparc64 optimized memcmp code.
  *
  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
diff --git a/arch/sparc64/lib/memscan.S b/arch/sparc64/lib/memscan.S
index 5e72d4911417..5686dfa5dc15 100644
--- a/arch/sparc64/lib/memscan.S
+++ b/arch/sparc64/lib/memscan.S
@@ -1,4 +1,4 @@
-/* $Id: memscan.S,v 1.3 2000/01/31 04:59:10 davem Exp $
+/*
  * memscan.S: Optimized memscan for Sparc64.
  *
  * Copyright (C) 1997,1998 Jakub Jelinek (jj@ultra.linux.cz)
diff --git a/arch/sparc64/lib/strncmp.S b/arch/sparc64/lib/strncmp.S
index 6f14f53dbabe..980e83751556 100644
--- a/arch/sparc64/lib/strncmp.S
+++ b/arch/sparc64/lib/strncmp.S
@@ -1,4 +1,4 @@
-/* $Id: strncmp.S,v 1.2 1997/03/11 17:51:44 jj Exp $
+/*
  * Sparc64 optimized strncmp code.
  *
  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
diff --git a/arch/sparc64/lib/strncpy_from_user.S b/arch/sparc64/lib/strncpy_from_user.S
index b2f499f79427..511c8f136f95 100644
--- a/arch/sparc64/lib/strncpy_from_user.S
+++ b/arch/sparc64/lib/strncpy_from_user.S
@@ -1,4 +1,4 @@
-/* $Id: strncpy_from_user.S,v 1.6 1999/05/25 16:53:05 jj Exp $
+/*
  * strncpy_from_user.S: Sparc64 strncpy from userspace.
  *
  *  Copyright (C) 1997, 1999 Jakub Jelinek (jj@ultra.linux.cz)
diff --git a/arch/sparc64/math-emu/math.c b/arch/sparc64/math-emu/math.c
index 6ee496c2864a..add053e0f3b3 100644
--- a/arch/sparc64/math-emu/math.c
+++ b/arch/sparc64/math-emu/math.c
@@ -1,4 +1,4 @@
-/* $Id: math.c,v 1.11 1999/12/20 05:02:25 davem Exp $
+/*
  * arch/sparc64/math-emu/math.c
  *
  * Copyright (C) 1997,1999 Jakub Jelinek (jj@ultra.linux.cz)
diff --git a/arch/sparc64/math-emu/sfp-util.h b/arch/sparc64/math-emu/sfp-util.h
index 31e474738cf6..425d3cf01af4 100644
--- a/arch/sparc64/math-emu/sfp-util.h
+++ b/arch/sparc64/math-emu/sfp-util.h
@@ -1,4 +1,4 @@
-/* $Id: sfp-util.h,v 1.5 2001/06/10 06:48:46 davem Exp $
+/*
  * arch/sparc64/math-emu/sfp-util.h
  *
  * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
diff --git a/arch/sparc64/mm/Makefile b/arch/sparc64/mm/Makefile
index e415bf942bcd..68d04c0370f4 100644
--- a/arch/sparc64/mm/Makefile
+++ b/arch/sparc64/mm/Makefile
@@ -1,4 +1,3 @@
-# $Id: Makefile,v 1.8 2000/12/14 22:57:25 davem Exp $
 # Makefile for the linux Sparc64-specific parts of the memory manager.
 #
 
diff --git a/arch/sparc64/mm/fault.c b/arch/sparc64/mm/fault.c
index 2650d0d33ac2..236f4d228d2b 100644
--- a/arch/sparc64/mm/fault.c
+++ b/arch/sparc64/mm/fault.c
@@ -1,4 +1,4 @@
-/* $Id: fault.c,v 1.59 2002/02/09 19:49:31 davem Exp $
+/*
  * arch/sparc64/mm/fault.c: Page fault handlers for the 64-bit Sparc.
  *
  * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/mm/generic.c b/arch/sparc64/mm/generic.c
index af9d81db0b38..f362c2037013 100644
--- a/arch/sparc64/mm/generic.c
+++ b/arch/sparc64/mm/generic.c
@@ -1,4 +1,4 @@
-/* $Id: generic.c,v 1.18 2001/12/21 04:56:15 davem Exp $
+/*
  * generic.c: Generic Sparc mm routines that are not dependent upon
  *            MMU type but are Sparc specific.
  *
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 3c7b9471eafb..84898c44dd4d 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -1,4 +1,4 @@
-/*  $Id: init.c,v 1.209 2002/02/09 19:49:31 davem Exp $
+/*
  *  arch/sparc64/mm/init.c
  *
  *  Copyright (C) 1996-1999 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/mm/ultra.S b/arch/sparc64/mm/ultra.S
index 796e005dad8b..9bb2d90a9df6 100644
--- a/arch/sparc64/mm/ultra.S
+++ b/arch/sparc64/mm/ultra.S
@@ -1,7 +1,7 @@
-/* $Id: ultra.S,v 1.72 2002/02/09 19:49:31 davem Exp $
+/*
  * ultra.S: Don't expand these all over the place...
  *
- * Copyright (C) 1997, 2000 David S. Miller (davem@redhat.com)
+ * Copyright (C) 1997, 2000, 2008 David S. Miller (davem@davemloft.net)
  */
 
 #include <asm/asi.h>
@@ -15,6 +15,7 @@
 #include <asm/thread_info.h>
 #include <asm/cacheflush.h>
 #include <asm/hypervisor.h>
+#include <asm/cpudata.h>
 
         /* Basically, most of the Spitfire vs. Cheetah madness
          * has to do with the fact that Cheetah does not support
@@ -514,6 +515,32 @@ xcall_report_regs:
         b               rtrap_xcall
          ldx            [%sp + PTREGS_OFF + PT_V9_TSTATE], %l1
 
+#ifdef CONFIG_MAGIC_SYSRQ
+        .globl          xcall_fetch_glob_regs
+xcall_fetch_glob_regs:
+        sethi           %hi(global_reg_snapshot), %g1
+        or              %g1, %lo(global_reg_snapshot), %g1
+        __GET_CPUID(%g2)
+        sllx            %g2, 6, %g3
+        add             %g1, %g3, %g1
+        rdpr            %tstate, %g7
+        stx             %g7, [%g1 + GR_SNAP_TSTATE]
+        rdpr            %tpc, %g7
+        stx             %g7, [%g1 + GR_SNAP_TPC]
+        rdpr            %tnpc, %g7
+        stx             %g7, [%g1 + GR_SNAP_TNPC]
+        stx             %o7, [%g1 + GR_SNAP_O7]
+        stx             %i7, [%g1 + GR_SNAP_I7]
+        sethi           %hi(trap_block), %g7
+        or              %g7, %lo(trap_block), %g7
+        sllx            %g2, TRAP_BLOCK_SZ_SHIFT, %g2
+        add             %g7, %g2, %g7
+        ldx             [%g7 + TRAP_PER_CPU_THREAD], %g3
+        membar          #StoreStore
+        stx             %g3, [%g1 + GR_SNAP_THREAD]
+        retry
+#endif /* CONFIG_MAGIC_SYSRQ */
+
 #ifdef DCACHE_ALIASING_POSSIBLE
         .align          32
         .globl          xcall_flush_dcache_page_cheetah
diff --git a/arch/sparc64/prom/Makefile b/arch/sparc64/prom/Makefile
index 3d33ed27bc27..8c94483ca54d 100644
--- a/arch/sparc64/prom/Makefile
+++ b/arch/sparc64/prom/Makefile
@@ -1,4 +1,3 @@
-# $Id: Makefile,v 1.7 2000/12/14 22:57:25 davem Exp $
 # Makefile for the Sun Boot PROM interface library under
 # Linux.
 #
diff --git a/arch/sparc64/prom/bootstr.c b/arch/sparc64/prom/bootstr.c
index a7278614e99d..ab9ccc63b388 100644
--- a/arch/sparc64/prom/bootstr.c
+++ b/arch/sparc64/prom/bootstr.c
@@ -1,4 +1,4 @@
-/* $Id: bootstr.c,v 1.6 1999/08/31 06:55:01 davem Exp $
+/*
  * bootstr.c:  Boot string/argument acquisition from the PROM.
  *
  * Copyright(C) 1995 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/prom/devops.c b/arch/sparc64/prom/devops.c
index 4641839eb39a..9dbd803e46e1 100644
--- a/arch/sparc64/prom/devops.c
+++ b/arch/sparc64/prom/devops.c
@@ -1,4 +1,4 @@
-/* $Id: devops.c,v 1.3 1997/10/29 07:43:28 ecd Exp $
+/*
  * devops.c:  Device operations using the PROM.
  *
  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
diff --git a/arch/sparc64/prom/init.c b/arch/sparc64/prom/init.c
index 87e7c7ea0ee6..7b00f89490a4 100644
--- a/arch/sparc64/prom/init.c
+++ b/arch/sparc64/prom/init.c
@@ -1,4 +1,4 @@
-/* $Id: init.c,v 1.10 1999/09/21 14:35:59 davem Exp $
+/*
  * init.c:  Initialize internal variables used by the PROM
  *          library functions.
  *
diff --git a/arch/sparc64/prom/misc.c b/arch/sparc64/prom/misc.c
index 47a877a15abd..9b0c0760901e 100644
--- a/arch/sparc64/prom/misc.c
+++ b/arch/sparc64/prom/misc.c
@@ -1,4 +1,4 @@
-/* $Id: misc.c,v 1.20 2001/09/21 03:17:07 kanoj Exp $
+/*
  * misc.c:  Miscellaneous prom functions that don't belong
  *          anywhere else.
  *
diff --git a/arch/sparc64/prom/p1275.c b/arch/sparc64/prom/p1275.c
index 7fcccc0e19cf..4b7c937bba61 100644
--- a/arch/sparc64/prom/p1275.c
+++ b/arch/sparc64/prom/p1275.c
@@ -1,4 +1,4 @@
-/* $Id: p1275.c,v 1.22 2001/10/18 09:40:00 davem Exp $
+/*
  * p1275.c: Sun IEEE 1275 PROM low level interface routines
  *
  * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
diff --git a/arch/sparc64/prom/tree.c b/arch/sparc64/prom/tree.c
index a99ccd7fb1b0..281aea44790b 100644
--- a/arch/sparc64/prom/tree.c
+++ b/arch/sparc64/prom/tree.c
@@ -1,4 +1,4 @@
-/* $Id: tree.c,v 1.10 1998/01/10 22:39:00 ecd Exp $
+/*
  * tree.c: Basic device tree traversal/scanning for the Linux
  *         prom library.
  *