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blk_rq_map_user_iov(): move iov_iter_advance() down 

... into bio_{map,copy}_user_iov()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-09-24 09:25:39 -04:00
parent b282cc7669
commit e81cef5d30
3 changed files with 6 additions and 5 deletions
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6
block/bio.c
View File

@ -1195,7 +1195,7 @@ int bio_uncopy_user(struct bio *bio)
*/
struct bio *bio_copy_user_iov(struct request_queue *q,
struct rq_map_data *map_data,
const struct iov_iter *iter,
struct iov_iter *iter,
gfp_t gfp_mask)
{
struct bio_map_data *bmd;
@ -1298,6 +1298,7 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
if (ret)
goto cleanup;
}
iov_iter_advance(iter, bio->bi_iter.bi_size);
bio->bi_private = bmd;
return bio;
@ -1320,7 +1321,7 @@ out_bmd:
* device. Returns an error pointer in case of error.
*/
struct bio *bio_map_user_iov(struct request_queue *q,
const struct iov_iter *iter,
struct iov_iter *iter,
gfp_t gfp_mask)
{
int j;
@ -1399,6 +1400,7 @@ struct bio *bio_map_user_iov(struct request_queue *q,
* reference to it
*/
bio_get(bio);
iov_iter_advance(iter, bio->bi_iter.bi_size);
return bio;
out_unmap:

1
block/blk-map.c
View File

@ -69,7 +69,6 @@ static int __blk_rq_map_user_iov(struct request *rq,
if (map_data && map_data->null_mapped)
bio_set_flag(bio, BIO_NULL_MAPPED);
iov_iter_advance(iter, bio->bi_iter.bi_size);
if (map_data)
map_data->offset += bio->bi_iter.bi_size;

4
include/linux/bio.h
View File

@ -462,7 +462,7 @@ extern int bio_add_pc_page(struct request_queue *, struct bio *, struct page *,
int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter);
struct rq_map_data;
extern struct bio *bio_map_user_iov(struct request_queue *,
const struct iov_iter *, gfp_t);
struct iov_iter *, gfp_t);
extern void bio_unmap_user(struct bio *);
extern struct bio *bio_map_kern(struct request_queue *, void *, unsigned int,
gfp_t);
@ -494,7 +494,7 @@ extern void bio_free_pages(struct bio *bio);
extern struct bio *bio_copy_user_iov(struct request_queue *,
struct rq_map_data *,
const struct iov_iter *,
struct iov_iter *,
gfp_t);
extern int bio_uncopy_user(struct bio *);
void zero_fill_bio(struct bio *bio);