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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-09-24 12:14:36 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-10-11 17:23:41 -0400 |
| commit | 98a09d6106660ec6e69ff2a6fa14039bd504412b (patch) | |
| tree | 6236e7f0d34aa6559f26ee4eb18d6e7dff922af2 | |
| parent | 2884d0be878eb5cbbc6d983c6054feef3b9aa86d (diff) | |
| download | linux-98a09d6106660ec6e69ff2a6fa14039bd504412b.tar.bz2 | |
bio_copy_from_iter(): get rid of copying iov_iter
we want the one passed to it advanced, anyway
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | block/bio.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/block/bio.c b/block/bio.c index 02457c2d4379..f5002b44c963 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1088,7 +1088,7 @@ static struct bio_map_data *bio_alloc_map_data(unsigned int iov_count, * Copy all pages from iov_iter to bio. * Returns 0 on success, or error on failure. */ -static int bio_copy_from_iter(struct bio *bio, struct iov_iter iter) +static int bio_copy_from_iter(struct bio *bio, struct iov_iter *iter) { int i; struct bio_vec *bvec; @@ -1099,9 +1099,9 @@ static int bio_copy_from_iter(struct bio *bio, struct iov_iter iter) ret = copy_page_from_iter(bvec->bv_page, bvec->bv_offset, bvec->bv_len, - &iter); + iter); - if (!iov_iter_count(&iter)) + if (!iov_iter_count(iter)) break; if (ret < bvec->bv_len) @@ -1297,11 +1297,12 @@ struct bio *bio_copy_user_iov(struct request_queue *q, */ if (((iter->type & WRITE) && (!map_data || !map_data->null_mapped)) || (map_data && map_data->from_user)) { - ret = bio_copy_from_iter(bio, *iter); + ret = bio_copy_from_iter(bio, iter); if (ret) goto cleanup; + } else { + iov_iter_advance(iter, bio->bi_iter.bi_size); } - iov_iter_advance(iter, bio->bi_iter.bi_size); bio->bi_private = bmd; if (map_data && map_data->null_mapped) |