+2014-08-12 Bernard Ogden <bernie.ogden@linaro.org>
+
+ [BZ #16892]
+ * sysdeps/nptl/lowlevellock.h (__lll_timedlock): Use
+ atomic_compare_and_exchange_bool_acq rather than atomic_exchange_acq.
+
2014-08-12 Sean Anderson <seanga2@gmail.com>
* malloc/malloc.c: Fix typo in comment.
extern int __lll_robust_timedlock_wait (int *futex, const struct timespec *,
int private) attribute_hidden;
+/* Take futex if it is untaken.
+ Otherwise block until either we get the futex or abstime runs out. */
#define __lll_timedlock(futex, abstime, private) \
({ \
int *__futex = (futex); \
int __val = 0; \
\
- if (__glibc_unlikely (atomic_exchange_acq (__futex, 1))) \
+ if (__glibc_unlikely \
+ (atomic_compare_and_exchange_bool_acq (__futex, 1, 0))) \
__val = __lll_timedlock_wait (__futex, abstime, private); \
__val; \
})