block: extend queue_flag bitops

[linux-2.6-omap-h63xx.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index ff9d0bdf2a1613b10f45383e2879c9fecbd7929d..e04c4ac8a7cf8ba83348af1a47f370acab422d60 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -428,6 +428,32 @@ static inline void queue_flag_set_unlocked(unsigned int flag,
        __set_bit(flag, &q->queue_flags);
 }
 
+static inline int queue_flag_test_and_clear(unsigned int flag,
+                                           struct request_queue *q)
+{
+       WARN_ON_ONCE(!queue_is_locked(q));
+
+       if (test_bit(flag, &q->queue_flags)) {
+               __clear_bit(flag, &q->queue_flags);
+               return 1;
+       }
+
+       return 0;
+}
+
+static inline int queue_flag_test_and_set(unsigned int flag,
+                                         struct request_queue *q)
+{
+       WARN_ON_ONCE(!queue_is_locked(q));
+
+       if (!test_bit(flag, &q->queue_flags)) {
+               __set_bit(flag, &q->queue_flags);
+               return 0;
+       }
+
+       return 1;
+}
+
 static inline void queue_flag_set(unsigned int flag, struct request_queue *q)
 {
        WARN_ON_ONCE(!queue_is_locked(q));