Merge remote-tracking branch 'gpio/for-next'

[karo-tx-linux.git] / include / linux / lockref.h

diff --git a/include/linux/lockref.h b/include/linux/lockref.h
index f279ed9a91631cca7f236d20ef5a29d152332932..13dfd36a329474df228102dd49bafbdf1b5c687d 100644 (file)
--- a/include/linux/lockref.h
+++ b/include/linux/lockref.h
@@ -36,4 +36,10 @@ extern int lockref_put_or_lock(struct lockref *);
 extern void lockref_mark_dead(struct lockref *);
 extern int lockref_get_not_dead(struct lockref *);
 
+/* Must be called under spinlock for reliable results */
+static inline int __lockref_is_dead(const struct lockref *l)
+{
+       return ((int)l->count < 0);
+}
+
 #endif /* __LINUX_LOCKREF_H */