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authorJan Kiszka <jan.kiszka@web.de>2007-05-02 19:27:21 +0200
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 19:27:21 +0200
commitc41bf8fa5e777b6a8a19cf2484937a7167eac77f (patch)
tree982494445301d399078fe6abdedc724843561f5d
parent02b64dab5675bc08048c7f70cbb0d8a417d20dbe (diff)
downloadlinux-linaro-stable-c41bf8fa5e777b6a8a19cf2484937a7167eac77f.tar.gz
[PATCH] i386: avoid redundant preempt_disable in __unlazy_fpu
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>
-rw-r--r--include/asm-i386/i387.h11
1 files changed, 6 insertions, 5 deletions
diff --git a/include/asm-i386/i387.h b/include/asm-i386/i387.h
index 49dc8e141310..cdd1e248e3b4 100644
--- a/include/asm-i386/i387.h
+++ b/include/asm-i386/i387.h
@@ -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 ) \