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| author | yu liu <yu.liu@freescale.com> | 2011-06-14 18:34:25 -0500 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-07-12 13:16:30 +0300 |
| commit | 685659ee70db0bac47ffd619c726cf600e504fd7 (patch) | |
| tree | 80d17e740132295a77732b539ce620203c3646ba /arch/powerpc/kernel/process.c | |
| parent | a22a2daccfa3ade5cdd9ef1e8a05cf1e6ffca42b (diff) | |
| download | kernel_samsung_smdk4412-685659ee70db0bac47ffd619c726cf600e504fd7.zip kernel_samsung_smdk4412-685659ee70db0bac47ffd619c726cf600e504fd7.tar.gz kernel_samsung_smdk4412-685659ee70db0bac47ffd619c726cf600e504fd7.tar.bz2 | |
powerpc/e500: Save SPEFCSR in flush_spe_to_thread()
giveup_spe() saves the SPE state which is protected by MSR[SPE].
However, modifying SPEFSCR does not trap when MSR[SPE]=0.
And since SPEFSCR is already saved/restored in _switch(),
not all the callers want to save SPEFSCR again.
Thus, saving SPEFSCR should not belong to giveup_spe().
This patch moves SPEFSCR saving to flush_spe_to_thread(),
and cleans up the caller that needs to save SPEFSCR accordingly.
Signed-off-by: Liu Yu <yu.liu@freescale.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kernel/process.c')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 91e52df..60ac2a9 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -213,6 +213,7 @@ void flush_spe_to_thread(struct task_struct *tsk) #ifdef CONFIG_SMP BUG_ON(tsk != current); #endif + tsk->thread.spefscr = mfspr(SPRN_SPEFSCR); giveup_spe(tsk); } preempt_enable(); |