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>

1 files changed, 1 insertions, 1 deletions

diff --git a/block/blk-map.c b/block/blk-map.c
index ae4ae1047fd9..86d93779c066 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -188,7 +188,7 @@ EXPORT_SYMBOL(blk_rq_map_user);
  *    unmapping.
  */
 int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
-                        struct rq_map_data *map_data, struct sg_iovec *iov,
+                        struct rq_map_data *map_data, const struct sg_iovec *iov,
                         int iov_count, unsigned int len, gfp_t gfp_mask)
 {
         struct bio *bio;