constify blk_rq_map_user_iov() and friends
sg_iovec array passed to it can be const
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 4afa4f8..a639fd8 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -823,8 +823,8 @@
extern int blk_rq_unmap_user(struct bio *);
extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, unsigned int, gfp_t);
extern int blk_rq_map_user_iov(struct request_queue *, struct request *,
- struct rq_map_data *, struct sg_iovec *, int,
- unsigned int, gfp_t);
+ struct rq_map_data *, const struct sg_iovec *,
+ int, unsigned int, gfp_t);
extern int blk_execute_rq(struct request_queue *, struct gendisk *,
struct request *, int);
extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,