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-rw-r--r--lib/rwsem.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/rwsem.c b/lib/rwsem.c
index 3e3365e..ceba8e2 100644
--- a/lib/rwsem.c
+++ b/lib/rwsem.c
@@ -136,9 +136,10 @@ __rwsem_do_wake(struct rw_semaphore *sem, int downgrading)
out:
return sem;
- /* undo the change to count, but check for a transition 1->0 */
+ /* undo the change to the active count, but check for a transition
+ * 1->0 */
undo:
- if (rwsem_atomic_update(-RWSEM_ACTIVE_BIAS, sem) != 0)
+ if (rwsem_atomic_update(-RWSEM_ACTIVE_BIAS, sem) & RWSEM_ACTIVE_MASK)
goto out;
goto try_again;
}
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