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-rw-r--r--include/asm-s390/rwsem.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-s390/rwsem.h b/include/asm-s390/rwsem.h
index 8c0cebbfc03..0422a085dd5 100644
--- a/include/asm-s390/rwsem.h
+++ b/include/asm-s390/rwsem.h
@@ -351,5 +351,10 @@ static inline long rwsem_atomic_update(long delta, struct rw_semaphore *sem)
return new;
}
+static inline int rwsem_is_locked(struct rw_semaphore *sem)
+{
+ return (sem->count != 0);
+}
+
#endif /* __KERNEL__ */
#endif /* _S390_RWSEM_H */