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Subject[PATCH v1 04/54] mm: page_io.c: comment on direct access to bvec table
Date
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
mm/page_io.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/mm/page_io.c b/mm/page_io.c
index 23f6d0d3470f..368a16aa810c 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) {
@@ -116,6 +117,7 @@ static void swap_slot_free_notify(struct page *page)

static void end_swap_bio_read(struct bio *bio)
{
+ /* single page bio, safe for multipage bvec */
struct page *page = bio->bi_io_vec[0].bv_page;

if (bio->bi_error) {
--
2.7.4
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