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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-08-27 15:03:30 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-08-27 15:03:30 +1000 |
| commit | 3f1f4311881b330a7b5429dd101e676df191b159 (patch) | |
| tree | a2533df8b157a7006c8c0cb2f89de32820135e50 /arch/powerpc/kernel/process.c | |
| parent | 5935ff4343a689fbb382d64408bc6955c6589830 (diff) | |
| parent | 28e61cc466d8daace4b0f04ba2b83e0bd68f5832 (diff) | |
Merge branch 'merge' into next
Merge stuff that already went into Linus via "merge" which
are pre-reqs for subsequent patches
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 0ec255a81c66..6f428da53e20 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -602,6 +602,16 @@ struct task_struct *__switch_to(struct task_struct *prev, struct ppc64_tlb_batch *batch; #endif + /* Back up the TAR across context switches. + * Note that the TAR is not available for use in the kernel. (To + * provide this, the TAR should be backed up/restored on exception + * entry/exit instead, and be in pt_regs. FIXME, this should be in + * pt_regs anyway (for debug).) + * Save the TAR here before we do treclaim/trecheckpoint as these + * will change the TAR. + */ + save_tar(&prev->thread); + __switch_to_tm(prev); #ifdef CONFIG_SMP |