block: Add interface to abort queued requests

Signed-off-by: Mike Anderson <andmike@linux.vnet.ibm.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 067f28b..37781d6 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -788,6 +788,7 @@
 extern void blk_complete_request(struct request *);
 extern void __blk_complete_request(struct request *);
 extern void blk_abort_request(struct request *);
+extern void blk_abort_queue(struct request_queue *);
 
 /*
  * blk_end_request() takes bytes instead of sectors as a complete size.