redonkable/alistair23-linux
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jump_label: unlikely(x) > 0

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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>
This commit is contained in:
Roel Kluin 2013-11-12 15:08:44 -08:00 committed by Linus Torvalds
parent 81e41ea25b
commit 261adc9a60
1 changed files with 2 additions and 2 deletions
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4
include/linux/jump_label.h
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@ -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;
}