Revert to Fedora kernel-2.6.17-1.2187_FC5 patched with vs2.0.2.1; there are too many...

[linux-2.6.git] / arch / x86_64 / kernel / process.c

diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c
index 583d96f..051ad11 100644 (file)
--- a/arch/x86_64/kernel/process.c
+++ b/arch/x86_64/kernel/process.c
@@ -10,6 +10,7 @@
  *     Andi Kleen.
  *
  *     CPU hotplug support - ashok.raj@intel.com
+ *  $Id: process.c,v 1.38 2002/01/15 10:08:03 ak Exp $
  */
 
 /*
@@ -63,7 +64,6 @@ 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();
 
-       current_thread_info()->status &= ~TS_POLLING;
+       clear_thread_flag(TIF_POLLING_NRFLAG);
        smp_mb__after_clear_bit();
        while (!need_resched()) {
                local_irq_disable();
@@ -120,7 +120,7 @@ static void default_idle(void)
                else
                        local_irq_enable();
        }
-       current_thread_info()->status |= TS_POLLING;
+       set_thread_flag(TIF_POLLING_NRFLAG);
 }
 
 /*
@@ -203,7 +203,8 @@ static inline void play_dead(void)
  */
 void cpu_idle (void)
 {
-       current_thread_info()->status |= TS_POLLING;
+       set_thread_flag(TIF_POLLING_NRFLAG);
+
        /* endless idle loop with no priority at all */
        while (1) {
                while (!need_resched()) {
@@ -296,7 +297,7 @@ void __show_regs(struct pt_regs * regs)
                system_utsname.version);
        printk("RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->rip);
        printk_address(regs->rip); 
-       printk("RSP: %04lx:%016lx  EFLAGS: %08lx\n", regs->ss, regs->rsp,
+       printk("\nRSP: %04lx:%016lx  EFLAGS: %08lx\n", regs->ss, regs->rsp,
                regs->eflags);
        printk("RAX: %016lx RBX: %016lx RCX: %016lx\n",
               regs->rax, regs->rbx, regs->rcx);
@@ -334,7 +335,7 @@ void show_regs(struct pt_regs *regs)
 {
        printk("CPU %d:", smp_processor_id());
        __show_regs(regs);
-       show_trace(NULL, regs, (void *)(regs + 1));
+       show_trace(&regs->rsp);
 }
 
 /*
@@ -364,11 +365,8 @@ 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;
@@ -571,9 +569,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
                prev->gsindex = gsindex;
        }
 
-       /* Must be after DS reload */
-       unlazy_fpu(prev_p);
-
        /* 
         * Switch the PDA and FPU contexts.
         */
@@ -581,6 +576,10 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
        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. 
+          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);