1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
index 8970c3e802e2..8b9c7e9f6910 100644
--- a/include/linux/rwsem.h
+++ b/include/linux/rwsem.h
@@ -34,6 +34,13 @@ struct rw_semaphore {
 
 /* Include the arch specific part */
 #include <asm/rwsem.h>
+
+/* In all implementations count != 0 means locked */
+static inline int rwsem_is_locked(struct rw_semaphore *sem)
+{
+        return sem->count != 0;
+}
+
 #endif
 
 /* Common initializer macros and functions */