diff --git a/include/linux/rwsem-spinlock.h b/include/linux/rwsem-spinlock.h
index 6c3c0f6..bdfcc25 100644
--- a/include/linux/rwsem-spinlock.h
+++ b/include/linux/rwsem-spinlock.h
@@ -68,11 +68,7 @@
 extern void __up_read(struct rw_semaphore *sem);
 extern void __up_write(struct rw_semaphore *sem);
 extern void __downgrade_write(struct rw_semaphore *sem);
-
-static inline int rwsem_is_locked(struct rw_semaphore *sem)
-{
-	return (sem->activity != 0);
-}
+extern int rwsem_is_locked(struct rw_semaphore *sem);
 
 #endif /* __KERNEL__ */
 #endif /* _LINUX_RWSEM_SPINLOCK_H */