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| author | Shaohua Li <shaohua.li@intel.com> | 2005-10-30 14:59:28 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-30 17:37:11 -0800 |
| commit | 08967f941ad897b2f7c2f99e886c75d6319e5087 (patch) | |
| tree | 7277fe5fee546f5d94debfc479f81bdc4af895a4 | |
| parent | 8896fab35e62aa748a5ce62ac773508e51f10be1 (diff) | |
| download | linux-3.10-08967f941ad897b2f7c2f99e886c75d6319e5087.tar.gz linux-3.10-08967f941ad897b2f7c2f99e886c75d6319e5087.tar.bz2 linux-3.10-08967f941ad897b2f7c2f99e886c75d6319e5087.zip | |
[PATCH] FPU context corrupted after resume
mxcsr_feature_mask_init isn't needed in suspend/resume time (we can use
boot time mask). And actually it's harmful, as it clear task's saved
fxsave in resume. This bug is widely seen by users using zsh.
(akpm: my eyes. Fixed some surrounding whitespace mess)
Signed-off-by: Shaohua Li<shaohua.li@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/i386/power/cpu.c | 12 | ||||
| -rw-r--r-- | arch/x86_64/kernel/suspend.c | 11 |
2 files changed, 10 insertions, 13 deletions
diff --git a/arch/i386/power/cpu.c b/arch/i386/power/cpu.c index b27c5acc79d..1f1572692e0 100644 --- a/arch/i386/power/cpu.c +++ b/arch/i386/power/cpu.c @@ -51,16 +51,14 @@ void save_processor_state(void) __save_processor_state(&saved_context); } -static void -do_fpu_end(void) +static void do_fpu_end(void) { - /* restore FPU regs if necessary */ - /* Do it out of line so that gcc does not move cr0 load to some stupid place */ - kernel_fpu_end(); - mxcsr_feature_mask_init(); + /* + * Restore FPU regs if necessary. + */ + kernel_fpu_end(); } - static void fix_processor_context(void) { int cpu = smp_processor_id(); diff --git a/arch/x86_64/kernel/suspend.c b/arch/x86_64/kernel/suspend.c index f066c6ab361..02516823f51 100644 --- a/arch/x86_64/kernel/suspend.c +++ b/arch/x86_64/kernel/suspend.c @@ -63,13 +63,12 @@ void save_processor_state(void) __save_processor_state(&saved_context); } -static void -do_fpu_end(void) +static void do_fpu_end(void) { - /* restore FPU regs if necessary */ - /* Do it out of line so that gcc does not move cr0 load to some stupid place */ - kernel_fpu_end(); - mxcsr_feature_mask_init(); + /* + * Restore FPU regs if necessary + */ + kernel_fpu_end(); } void __restore_processor_state(struct saved_context *ctxt) |