From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
From: Ming Lei <tom.leiming@gmail.com>
To: Jens Axboe <axboe@fb.com>,
	linux-kernel@vger.kernel.org
Cc: linux-block@vger.kernel.org,
	linux-fsdevel@vger.kernel.org,
	Christoph Hellwig <hch@infradead.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Ming Lei <tom.leiming@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Michal Hocko <mhocko@suse.com>,
	Minchan Kim <minchan@kernel.org>,
	Mike Christie <mchristi@redhat.com>,
	Santosh Shilimkar <santosh.shilimkar@oracle.com>,
	Joe Perches <joe@perches.com>,
	linux-mm@kvack.org (open list:MEMORY MANAGEMENT)
Subject: [PATCH 18/60] mm: page_io.c: comment on direct access to bvec table
Date: Sat, 29 Oct 2016 16:08:17 +0800
Message-Id: <1477728600-12938-19-git-send-email-tom.leiming@gmail.com>
In-Reply-To: <1477728600-12938-1-git-send-email-tom.leiming@gmail.com>
References: <1477728600-12938-1-git-send-email-tom.leiming@gmail.com>
Sender: owner-linux-mm@kvack.org
List-ID: <linux-fsdevel.vger.kernel.org>

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
 mm/page_io.c | 1 +
 1 file changed, 1 insertion(+)

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) {
-- 
2.7.4

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