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Message-Id: <1460635375-28282-28-git-send-email-tom.leiming@gmail.com>
Date: Thu, 14 Apr 2016 20:02:45 +0800
From: Ming Lei <tom.leiming@...il.com>
To: Jens Axboe <axboe@...com>, linux-kernel@...r.kernel.org
Cc: linux-block@...r.kernel.org, Christoph Hellwig <hch@...radead.org>,
Ming Lei <tom.leiming@...il.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Dongsu Park <dpark@...teo.net>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Kent Overstreet <kent.overstreet@...il.com>,
"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
Joe Perches <joe@...ches.com>,
Minchan Kim <minchan@...nel.org>,
linux-mm@...ck.org (open list:MEMORY MANAGEMENT)
Subject: [PATCH v1 27/27] mm: page_io.c: use bio_get_base_vec()
Signed-off-by: Ming Lei <tom.leiming@...il.com>
---
mm/page_io.c | 18 ++++++++++++++++--
1 file changed, 16 insertions(+), 2 deletions(-)
diff --git a/mm/page_io.c b/mm/page_io.c
index cd92e3d..1ced9d3 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -43,7 +43,14 @@ static struct bio *get_swap_bio(gfp_t gfp_flags,
void end_swap_bio_write(struct bio *bio)
{
- struct page *page = bio->bi_io_vec[0].bv_page;
+ /*
+ * Single bvec bio.
+ *
+ * For accessing page pointed to by the 1st bvec, it
+ * works too after multipage bvecs.
+ */
+ struct bio_vec *bvec = bio_get_base_vec(bio);
+ struct page *page = bvec->bv_page;
if (bio->bi_error) {
SetPageError(page);
@@ -116,7 +123,14 @@ static void swap_slot_free_notify(struct page *page)
static void end_swap_bio_read(struct bio *bio)
{
- struct page *page = bio->bi_io_vec[0].bv_page;
+ /*
+ * Single bvec bio.
+ *
+ * For accessing page pointed to by the 1st bvec, it
+ * works too after multipage bvecs.
+ */
+ struct bio_vec *bvec = bio_get_base_vec(bio);
+ struct page *page = bvec->bv_page;
if (bio->bi_error) {
SetPageError(page);
--
1.9.1
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