Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

7 files changed, 21 insertions, 60 deletions

diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index 064211d5f41b..d7811c4e8b50 100644
--- a/arch/i386/kernel/apm.c
+++ b/arch/i386/kernel/apm.c
@@ -911,14 +911,7 @@ static void apm_power_off(void)
                 0xcd, 0x15              /* int   $0x15       */
         };
 
-        /*
-         * This may be called on an SMP machine.
-         */
-#ifdef CONFIG_SMP
         /* Some bioses don't like being called from CPU != 0 */
-        set_cpus_allowed(current, cpumask_of_cpu(0));
-        BUG_ON(smp_processor_id() != 0);
-#endif
         if (apm_info.realmode_power_off)
         {
                 (void)apm_save_cpus();
diff --git a/arch/i386/kernel/i387.c b/arch/i386/kernel/i387.c
index b817168d9c62..d75524758daf 100644
--- a/arch/i386/kernel/i387.c
+++ b/arch/i386/kernel/i387.c
@@ -82,17 +82,6 @@ void kernel_fpu_begin(void)
 }
 EXPORT_SYMBOL_GPL(kernel_fpu_begin);
 
-void restore_fpu( struct task_struct *tsk )
-{
-        if ( cpu_has_fxsr ) {
-                asm volatile( "fxrstor %0"
-                              : : "m" (tsk->thread.i387.fxsave) );
-        } else {
-                asm volatile( "frstor %0"
-                              : : "m" (tsk->thread.i387.fsave) );
-        }
-}
-
 /*
  * FPU tag word conversions.
  */
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c
index ba243a4cc119..d9492058aaf3 100644
--- a/arch/i386/kernel/process.c
+++ b/arch/i386/kernel/process.c
@@ -700,23 +700,27 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas
 
         /*
          * Restore %fs and %gs if needed.
+         *
+         * Glibc normally makes %fs be zero, and %gs is one of
+         * the TLS segments.
          */
-        if (unlikely(prev->fs | prev->gs | next->fs | next->gs)) {
+        if (unlikely(prev->fs | next->fs))
                 loadsegment(fs, next->fs);
+
+        if (prev->gs | next->gs)
                 loadsegment(gs, next->gs);
-        }
 
         /*
          * Now maybe reload the debug registers
          */
         if (unlikely(next->debugreg[7])) {
-                set_debugreg(current->thread.debugreg[0], 0);
-                set_debugreg(current->thread.debugreg[1], 1);
-                set_debugreg(current->thread.debugreg[2], 2);
-                set_debugreg(current->thread.debugreg[3], 3);
+                set_debugreg(next->debugreg[0], 0);
+                set_debugreg(next->debugreg[1], 1);
+                set_debugreg(next->debugreg[2], 2);
+                set_debugreg(next->debugreg[3], 3);
                 /* no 4 and 5 */
-                set_debugreg(current->thread.debugreg[6], 6);
-                set_debugreg(current->thread.debugreg[7], 7);
+                set_debugreg(next->debugreg[6], 6);
+                set_debugreg(next->debugreg[7], 7);
         }
 
         if (unlikely(prev->io_bitmap_ptr || next->io_bitmap_ptr))
diff --git a/arch/i386/kernel/reboot.c b/arch/i386/kernel/reboot.c
index b3e584849961..c71fef31dc47 100644
--- a/arch/i386/kernel/reboot.c
+++ b/arch/i386/kernel/reboot.c
@@ -284,7 +284,7 @@ void machine_shutdown(void)
         reboot_cpu_id = 0;
 
         /* See if there has been given a command line override */
-        if ((reboot_cpu_id != -1) && (reboot_cpu < NR_CPUS) &&
+        if ((reboot_cpu != -1) && (reboot_cpu < NR_CPUS) &&
                 cpu_isset(reboot_cpu, cpu_online_map)) {
                 reboot_cpu_id = reboot_cpu;
         }
@@ -311,10 +311,8 @@ void machine_shutdown(void)
 #endif
 }
 
-void machine_restart(char * __unused)
+void machine_emergency_restart(void)
 {
-        machine_shutdown();
-
         if (!reboot_thru_bios) {
                 if (efi_enabled) {
                         efi.reset_system(EFI_RESET_COLD, EFI_SUCCESS, 0, NULL);
@@ -337,23 +335,22 @@ void machine_restart(char * __unused)
         machine_real_restart(jump_to_bios, sizeof(jump_to_bios));
 }
 
-EXPORT_SYMBOL(machine_restart);
+void machine_restart(char * __unused)
+{
+        machine_shutdown();
+        machine_emergency_restart();
+}
 
 void machine_halt(void)
 {
 }
 
-EXPORT_SYMBOL(machine_halt);
-
 void machine_power_off(void)
 {
-        lapic_shutdown();
+        machine_shutdown();
 
-        if (efi_enabled)
-                efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, NULL);
         if (pm_power_off)
                 pm_power_off();
 }
 
-EXPORT_SYMBOL(machine_power_off);
 
diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index 7306353c520e..af4de58cab54 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -1414,7 +1414,7 @@ static struct nop {
    This runs before SMP is initialized to avoid SMP problems with
    self modifying code. This implies that assymetric systems where
    APs have less capabilities than the boot processor are not handled. 
-   In this case boot with "noreplacement". */ 
+   Tough. Make sure you disable such features by hand. */ 
 void apply_alternatives(void *start, void *end) 
 { 
         struct alt_instr *a; 
@@ -1442,24 +1442,12 @@ void apply_alternatives(void *start, void *end)
         }
 } 
 
-static int no_replacement __initdata = 0; 
- 
 void __init alternative_instructions(void)
 {
         extern struct alt_instr __alt_instructions[], __alt_instructions_end[];
-        if (no_replacement) 
-                return;
         apply_alternatives(__alt_instructions, __alt_instructions_end);
 }
 
-static int __init noreplacement_setup(char *s)
-{ 
-     no_replacement = 1; 
-     return 0; 
-} 
-
-__setup("noreplacement", noreplacement_setup); 
-
 static char * __init machine_specific_memory_setup(void);
 
 #ifdef CONFIG_MCA
diff --git a/arch/i386/mach-visws/reboot.c b/arch/i386/mach-visws/reboot.c
index 95e4676594e1..9e9296676f93 100644
--- a/arch/i386/mach-visws/reboot.c
+++ b/arch/i386/mach-visws/reboot.c
@@ -22,8 +22,6 @@ void machine_restart(char * __unused)
         outb(PIIX4_RESET_VAL, PIIX4_RESET_PORT);
 }
 
-EXPORT_SYMBOL(machine_restart);
-
 void machine_power_off(void)
 {
         unsigned short pm_status;
@@ -43,10 +41,7 @@ void machine_power_off(void)
         outl(PIIX_SPECIAL_STOP, 0xCFC);
 }
 
-EXPORT_SYMBOL(machine_power_off);
-
 void machine_halt(void)
 {
 }
 
-EXPORT_SYMBOL(machine_halt);
diff --git a/arch/i386/mach-voyager/voyager_basic.c b/arch/i386/mach-voyager/voyager_basic.c
index 8680080a6a89..b3eda46e0fe9 100644
--- a/arch/i386/mach-voyager/voyager_basic.c
+++ b/arch/i386/mach-voyager/voyager_basic.c
@@ -278,8 +278,6 @@ machine_restart(char *cmd)
         }
 }
 
-EXPORT_SYMBOL(machine_restart);
-
 void
 mca_nmi_hook(void)
 {
@@ -315,12 +313,9 @@ machine_halt(void)
         machine_power_off();
 }
 
-EXPORT_SYMBOL(machine_halt);
-
 void machine_power_off(void)
 {
         if (pm_power_off)
                 pm_power_off();
 }
 
-EXPORT_SYMBOL(machine_power_off);