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-rw-r--r--include/asm-x86_64/rwsem.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-x86_64/rwsem.h b/include/asm-x86_64/rwsem.h
index c002175b6e82..46077e9c1910 100644
--- a/include/asm-x86_64/rwsem.h
+++ b/include/asm-x86_64/rwsem.h
@@ -274,5 +274,10 @@ LOCK_PREFIX "xaddl %0,(%2)"
return tmp+delta;
}
+static inline int rwsem_is_locked(struct rw_semaphore *sem)
+{
+ return (sem->count != 0);
+}
+
#endif /* __KERNEL__ */
#endif /* _X8664_RWSEM_H */