Merge ../linus

[pandora-kernel.git] / arch / x86_64 / kernel / process.c

diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c
index 70dd8e5..ca56e19 100644 (file)
--- a/arch/x86_64/kernel/process.c
+++ b/arch/x86_64/kernel/process.c
@@ -10,7 +10,6 @@
  *     Andi Kleen.
  *
  *     CPU hotplug support - ashok.raj@intel.com
- *  $Id: process.c,v 1.38 2002/01/15 10:08:03 ak Exp $
  */
 
 /*
@@ -64,6 +63,7 @@ EXPORT_SYMBOL(boot_option_idle_override);
  * Powermanagement idle function, if any..
  */
 void (*pm_idle)(void);
+EXPORT_SYMBOL(pm_idle);
 static DEFINE_PER_CPU(unsigned int, cpu_idle_state);
 
 static ATOMIC_NOTIFIER_HEAD(idle_notifier);
@@ -111,7 +111,7 @@ static void default_idle(void)
 {
        local_irq_enable();
 
-       clear_thread_flag(TIF_POLLING_NRFLAG);
+       current_thread_info()->status &= ~TS_POLLING;
        smp_mb__after_clear_bit();
        while (!need_resched()) {
                local_irq_disable();
@@ -120,7 +120,7 @@ static void default_idle(void)
                else
                        local_irq_enable();
        }
-       set_thread_flag(TIF_POLLING_NRFLAG);
+       current_thread_info()->status |= TS_POLLING;
 }
 
 /*
@@ -203,8 +203,7 @@ static inline void play_dead(void)
  */
 void cpu_idle (void)
 {
-       set_thread_flag(TIF_POLLING_NRFLAG);
-
+       current_thread_info()->status |= TS_POLLING;
        /* endless idle loop with no priority at all */
        while (1) {
                while (!need_resched()) {
@@ -335,7 +334,7 @@ void show_regs(struct pt_regs *regs)
 {
        printk("CPU %d:", smp_processor_id());
        __show_regs(regs);
-       show_trace(&regs->rsp);
+       show_trace(NULL, regs, (void *)(regs + 1));
 }
 
 /*
@@ -365,8 +364,11 @@ void flush_thread(void)
        struct task_struct *tsk = current;
        struct thread_info *t = current_thread_info();
 
-       if (t->flags & _TIF_ABI_PENDING)
+       if (t->flags & _TIF_ABI_PENDING) {
                t->flags ^= (_TIF_ABI_PENDING | _TIF_IA32);
+               if (t->flags & _TIF_IA32)
+                       current_thread_info()->status |= TS_COMPAT;
+       }
 
        tsk->thread.debugreg0 = 0;
        tsk->thread.debugreg1 = 0;
@@ -575,8 +577,10 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
        prev->userrsp = read_pda(oldrsp); 
        write_pda(oldrsp, next->userrsp); 
        write_pda(pcurrent, next_p); 
+
        /* This must be here to ensure both math_state_restore() and
-          kernel_fpu_begin() work consistently. */
+          kernel_fpu_begin() work consistently. 
+          And the AMD workaround requires it to be after DS reload. */
        unlazy_fpu(prev_p);
        write_pda(kernelstack,
                  task_stack_page(next_p) + THREAD_SIZE - PDA_STACKOFFSET);
@@ -781,10 +785,16 @@ long do_arch_prctl(struct task_struct *task, int code, unsigned long addr)
        }
        case ARCH_GET_GS: { 
                unsigned long base;
+               unsigned gsindex;
                if (task->thread.gsindex == GS_TLS_SEL)
                        base = read_32bit_tls(task, GS_TLS);
-               else if (doit)
-                       rdmsrl(MSR_KERNEL_GS_BASE, base);
+               else if (doit) {
+                       asm("movl %%gs,%0" : "=r" (gsindex));
+                       if (gsindex)
+                               rdmsrl(MSR_KERNEL_GS_BASE, base);
+                       else
+                               base = task->thread.gs;
+               }
                else
                        base = task->thread.gs;
                ret = put_user(base, (unsigned long __user *)addr);