[PATCH] remove unlikely() in might_sleep_if()
The likely() profiling tools show that __alloc_page() causes a lot of misses:
! 132 119193 __alloc_pages():mm/page_alloc.c@937
Because most __alloc_page() calls are not atomic.
Signed-off-by: Hua Zhong <hzhong@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 25fccd8..8c21aaa 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -78,7 +78,7 @@
# define might_sleep() do { might_resched(); } while (0)
#endif
-#define might_sleep_if(cond) do { if (unlikely(cond)) might_sleep(); } while (0)
+#define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)
#define abs(x) ({ \
int __x = (x); \