diff options
Diffstat (limited to 'arch/powerpc/kernel/process.c')
-rw-r--r-- | arch/powerpc/kernel/process.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index c517dbe705fd..8083be20fe5e 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c | |||
@@ -600,6 +600,16 @@ struct task_struct *__switch_to(struct task_struct *prev, | |||
600 | struct ppc64_tlb_batch *batch; | 600 | struct ppc64_tlb_batch *batch; |
601 | #endif | 601 | #endif |
602 | 602 | ||
603 | /* Back up the TAR across context switches. | ||
604 | * Note that the TAR is not available for use in the kernel. (To | ||
605 | * provide this, the TAR should be backed up/restored on exception | ||
606 | * entry/exit instead, and be in pt_regs. FIXME, this should be in | ||
607 | * pt_regs anyway (for debug).) | ||
608 | * Save the TAR here before we do treclaim/trecheckpoint as these | ||
609 | * will change the TAR. | ||
610 | */ | ||
611 | save_tar(&prev->thread); | ||
612 | |||
603 | __switch_to_tm(prev); | 613 | __switch_to_tm(prev); |
604 | 614 | ||
605 | #ifdef CONFIG_SMP | 615 | #ifdef CONFIG_SMP |