[PATCH]FPU context corrupted after resume

[PATCH]FPU context corrupted after resume

[Shaohua Li]

Hi,
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.


Signed-off-by: Shaohua Li<shaohua.li@intel.com>
---

 linux-2.6.13-root/arch/i386/power/cpu.c        |    1 -
 linux-2.6.13-root/arch/x86_64/kernel/suspend.c |    1 -
 2 files changed, 2 deletions(-)

diff -puN arch/i386/power/cpu.c~fpu_reinit_after_resume arch/i386/power/cpu.c
--- linux-2.6.13/arch/i386/power/cpu.c~fpu_reinit_after_resume	2005-09-14 09:35:13.000000000 +0800
+++ linux-2.6.13-root/arch/i386/power/cpu.c	2005-09-14 11:00:55.000000000 +0800
@@ -74,7 +74,6 @@ 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();
 }
 
 
diff -puN arch/x86_64/kernel/suspend.c~fpu_reinit_after_resume arch/x86_64/kernel/suspend.c
--- linux-2.6.13/arch/x86_64/kernel/suspend.c~fpu_reinit_after_resume	2005-09-14 11:02:21.000000000 +0800
+++ linux-2.6.13-root/arch/x86_64/kernel/suspend.c	2005-09-14 11:02:41.000000000 +0800
@@ -82,7 +82,6 @@ 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();
 }
 
 void __restore_processor_state(struct saved_context *ctxt)
_