Commit 261adc9a authored Nov 12, 2013 by Roel Kluin Committed by Linus Torvalds Nov 13, 2013

jump_label: unlikely(x) > 0

if (unlikely(x) > 0) doesn't seem to help branch prediction

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: "H. Peter Anvin" <hpa@linux.intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 81e41ea2

include/linux/jump_label.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -132,14 +132,14 @@ static __always_inline void jump_label_init(void)

		static __always_inline bool static_key_false(struct static_key *key)
		{
		if (unlikely(atomic_read(&key->enabled)) > 0)
		if (unlikely(atomic_read(&key->enabled) > 0))
		return true;
		return false;
		}

		static __always_inline bool static_key_true(struct static_key *key)
		{
		if (likely(atomic_read(&key->enabled)) > 0)
		if (likely(atomic_read(&key->enabled) > 0))
		return true;
		return false;
		}