diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | sysdeps/nptl/lowlevellock.h | 4 |
2 files changed, 7 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog index dd0a0b519f..e4885cf260 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2017-02-06 Stefan Liebler <stli@linux.vnet.ibm.com> + + * sysdeps/nptl/lowlevellock.h (lll_trylock, lll_cond_trylock): + Add __glibc_unlikely hint. + 2017-02-06 Adhemerval Zanella <adhemerval.zanella@linaro.org> [BZ #16640] diff --git a/sysdeps/nptl/lowlevellock.h b/sysdeps/nptl/lowlevellock.h index 42d9658d9d..54e3c28b0b 100644 --- a/sysdeps/nptl/lowlevellock.h +++ b/sysdeps/nptl/lowlevellock.h @@ -64,13 +64,13 @@ 0. Otherwise leave lock unchanged and return non-zero to indicate that the lock was not acquired. */ #define lll_trylock(lock) \ - atomic_compare_and_exchange_bool_acq (&(lock), 1, 0) + __glibc_unlikely (atomic_compare_and_exchange_bool_acq (&(lock), 1, 0)) /* If LOCK is 0 (not acquired), set to 2 (acquired, possibly with waiters) and return 0. Otherwise leave lock unchanged and return non-zero to indicate that the lock was not acquired. */ #define lll_cond_trylock(lock) \ - atomic_compare_and_exchange_bool_acq (&(lock), 2, 0) + __glibc_unlikely (atomic_compare_and_exchange_bool_acq (&(lock), 2, 0)) extern void __lll_lock_wait_private (int *futex) attribute_hidden; extern void __lll_lock_wait (int *futex, int private) attribute_hidden; |