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-rw-r--r--arch/ppc/kernel/process.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/ppc/kernel/process.c b/arch/ppc/kernel/process.c
index cb1c7b9..25cbdc8 100644
--- a/arch/ppc/kernel/process.c
+++ b/arch/ppc/kernel/process.c
@@ -417,6 +417,7 @@ void show_regs(struct pt_regs * regs)
void exit_thread(void)
{
+ preempt_disable();
if (last_task_used_math == current)
last_task_used_math = NULL;
if (last_task_used_altivec == current)
@@ -425,10 +426,12 @@ void exit_thread(void)
if (last_task_used_spe == current)
last_task_used_spe = NULL;
#endif
+ preempt_enable();
}
void flush_thread(void)
{
+ preempt_disable();
if (last_task_used_math == current)
last_task_used_math = NULL;
if (last_task_used_altivec == current)
@@ -437,6 +440,7 @@ void flush_thread(void)
if (last_task_used_spe == current)
last_task_used_spe = NULL;
#endif
+ preempt_enable();
}
void
@@ -535,6 +539,7 @@ void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp)
regs->nip = nip;
regs->gpr[1] = sp;
regs->msr = MSR_USER;
+ preempt_disable();
if (last_task_used_math == current)
last_task_used_math = NULL;
if (last_task_used_altivec == current)
@@ -543,6 +548,7 @@ void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp)
if (last_task_used_spe == current)
last_task_used_spe = NULL;
#endif
+ preempt_enable();
memset(current->thread.fpr, 0, sizeof(current->thread.fpr));
current->thread.fpscr.val = 0;
#ifdef CONFIG_ALTIVEC
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