Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c41bf8fa5e777b6a8a19cf2484937a7167eac77f
Commit: c41bf8fa5e777b6a8a19cf2484937a7167eac77f
Parent: 02b64dab5675bc08048c7f70cbb0d8a417d20dbe
Author: Jan Kiszka <[EMAIL PROTECTED]>
AuthorDate: Wed May 2 19:27:21 2007 +0200
Committer: Andi Kleen <[EMAIL PROTECTED]>
CommitDate: Wed May 2 19:27:21 2007 +0200
[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 <[EMAIL PROTECTED]>
Signed-off-by: Andi Kleen <[EMAIL PROTECTED]>
---
include/asm-i386/i387.h | 11 ++++++-----
1 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/include/asm-i386/i387.h b/include/asm-i386/i387.h
index 49dc8e1..cdd1e24 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 ) \
-
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