diff options
Diffstat (limited to 'include/asm-i386/i387.h')
| -rw-r--r-- | include/asm-i386/i387.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/asm-i386/i387.h b/include/asm-i386/i387.h index f6feb98a939..e678609bb57 100644 --- a/include/asm-i386/i387.h +++ b/include/asm-i386/i387.h @@ -19,10 +19,21 @@ extern void mxcsr_feature_mask_init(void); extern void init_fpu(struct task_struct *); + /* * FPU lazy state save handling... */ -extern void restore_fpu( struct task_struct *tsk ); + +/* + * The "nop" is needed to make the instructions the same + * length. + */ +#define restore_fpu(tsk) \ + alternative_input( \ + "nop ; frstor %1", \ + "fxrstor %1", \ + X86_FEATURE_FXSR, \ + "m" ((tsk)->thread.i387.fsave)) extern void kernel_fpu_begin(void); #define kernel_fpu_end() do { stts(); preempt_enable(); } while(0) |