diff options
Diffstat (limited to 'nptl/pthread_rwlock_rdlock.c')
| -rw-r--r-- | nptl/pthread_rwlock_rdlock.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/nptl/pthread_rwlock_rdlock.c b/nptl/pthread_rwlock_rdlock.c index 1df0327a22..6eb9e091c4 100644 --- a/nptl/pthread_rwlock_rdlock.c +++ b/nptl/pthread_rwlock_rdlock.c @@ -22,6 +22,7 @@ #include <pthread.h> #include <pthreadP.h> #include <stap-probe.h> +#include <elide.h> /* Acquire read lock for RWLOCK. Slow path. */ @@ -102,6 +103,12 @@ __pthread_rwlock_rdlock (pthread_rwlock_t *rwlock) LIBC_PROBE (rdlock_entry, 1, rwlock); + if (ELIDE_LOCK (rwlock->__data.__rwelision, + rwlock->__data.__lock == 0 + && rwlock->__data.__writer == 0 + && rwlock->__data.__nr_readers == 0)) + return 0; + /* Make sure we are alone. */ lll_lock (rwlock->__data.__lock, rwlock->__data.__shared); |