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[PATCH] i386: avoid redundant preempt_disable in __unlazy_fpu

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There are two callers of __unlazy_fpu, unlazy_fpu and __switch_to, and
none of them appear to require additional preempt_disable/enable here.
Let's open-code save_init_fpu in __unlazy_fpu to save a few ops.

Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Jan Kiszka 2007-05-02 19:27:21 +02:00 committed by Andi Kleen
parent 02b64dab56
commit c41bf8fa5e
1 changed files with 6 additions and 5 deletions
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11
include/asm-i386/i387.h
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@ -74,11 +74,12 @@ static inline void __save_init_fpu( struct task_struct *tsk )
task_thread_info(tsk)->status &= ~TS_USEDFPU;
}
#define __unlazy_fpu( tsk ) do { \
if (task_thread_info(tsk)->status & TS_USEDFPU) \
save_init_fpu( tsk ); \
else \
tsk->fpu_counter = 0; \
#define __unlazy_fpu( tsk ) do { \
if (task_thread_info(tsk)->status & TS_USEDFPU) { \
__save_init_fpu(tsk); \
stts(); \
} else \
tsk->fpu_counter = 0; \
} while (0)
#define __clear_fpu( tsk ) \