block: mark 1st parameter of bvec_iter_advance as const

bvec_iter_advance() only writes the parameter of iterator, so the base address of bvec can be marked as const safely. Without the change, we can see compiling warning in the following patch for implementing iterate_bvec(): lib/iov_iter.c with bvec iterator. Reviewed-by: Christoph Hellwig <[email protected]> Signed-off-by: Ming Lei <[email protected]> Tested-by: Hannes Reinecke <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
josf · Jun 9, 2016 · 80f162f · 80f162f
1 parent 0781e79
commit 80f162f
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
@@ -66,7 +66,8 @@ struct bvec_iter {
 	.bv_offset	= bvec_iter_offset((bvec), (iter)),	\
 })
 
-static inline void bvec_iter_advance(struct bio_vec *bv, struct bvec_iter *iter,
+static inline void bvec_iter_advance(const struct bio_vec *bv,
+				     struct bvec_iter *iter,
 				     unsigned bytes)
 {
 	WARN_ONCE(bytes > iter->bi_size,