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[18/60] mm: page_io.c: comment on direct access to bvec table

Message ID 1477728600-12938-19-git-send-email-tom.leiming@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ming Lei Oct. 29, 2016, 8:08 a.m. UTC 
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
 mm/page_io.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/mm/page_io.c b/mm/page_io.c
index a2651f58c86a..b0c0069ec1f4 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -43,6 +43,7 @@  static struct bio *get_swap_bio(gfp_t gfp_flags,
 
 void end_swap_bio_write(struct bio *bio)
 {
+	/* single page bio, safe for multipage bvec */
 	struct page *page = bio->bi_io_vec[0].bv_page;
 
 	if (bio->bi_error) {