Index: uspace/lib/c/include/fibril_synch.h
===================================================================
--- uspace/lib/c/include/fibril_synch.h	(revision b0a76d5b0890440e8cc9c28afd0d4bd417bb5546)
+++ uspace/lib/c/include/fibril_synch.h	(revision 2b0db9835c1e32e672c7506f3f3c9de6201714cd)
@@ -114,4 +114,5 @@
 extern bool fibril_rwlock_is_read_locked(fibril_rwlock_t *);
 extern bool fibril_rwlock_is_write_locked(fibril_rwlock_t *);
+extern bool fibril_rwlock_is_locked(fibril_rwlock_t *);
 
 extern void fibril_condvar_initialize(fibril_condvar_t *);