[PATCH v3 03/49] kernel/power/swap.c: comment on direct access to bvec table

[Ming Lei]

Cc: "Rafael J. Wysocki" <r...@rjwysocki.net>
Cc: linux...@vger.kernel.org
Signed-off-by: Ming Lei <ming....@redhat.com>
---
 kernel/power/swap.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 57d22571f306..aa52ccc03fcc 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -238,6 +238,8 @@ static void hib_init_batch(struct hib_bio_batch *hb)
 static void hib_end_io(struct bio *bio)
 {
        struct hib_bio_batch *hb = bio->bi_private;
+
+       /* single page bio, safe for multipage bvec */
        struct page *page = bio->bi_io_vec[0].bv_page;
 
        if (bio->bi_status) {
-- 
2.9.4