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-rw-r--r--include/linux/rwsem-spinlock.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/rwsem-spinlock.h b/include/linux/rwsem-spinlock.h
index b52a2af25f1..f30f805080a 100644
--- a/include/linux/rwsem-spinlock.h
+++ b/include/linux/rwsem-spinlock.h
@@ -61,5 +61,10 @@ extern void FASTCALL(__up_read(struct rw_semaphore *sem));
extern void FASTCALL(__up_write(struct rw_semaphore *sem));
extern void FASTCALL(__downgrade_write(struct rw_semaphore *sem));
+static inline int rwsem_is_locked(struct rw_semaphore *sem)
+{
+ return (sem->activity != 0);
+}
+
#endif /* __KERNEL__ */
#endif /* _LINUX_RWSEM_SPINLOCK_H */