1 files changed, 3 insertions, 1 deletions

diff --git a/lib/rwsem.c b/lib/rwsem.c
index cf0ad2ad19f5..19c5fa95e0b4 100644
--- a/lib/rwsem.c
+++ b/lib/rwsem.c
@@ -223,7 +223,9 @@ struct rw_semaphore __sched *rwsem_down_write_failed(struct rw_semaphore *sem)
                         count = RWSEM_ACTIVE_WRITE_BIAS;
                         if (!list_is_singular(&sem->wait_list))
                                 count += RWSEM_WAITING_BIAS;
-                        if (cmpxchg(&sem->count, RWSEM_WAITING_BIAS, count) ==
+
+                        if (sem->count == RWSEM_WAITING_BIAS &&
+                            cmpxchg(&sem->count, RWSEM_WAITING_BIAS, count) ==
                                                         RWSEM_WAITING_BIAS)
                                 break;
                 }