linux-kernel - [PATCH 18/27] dm: dm-io.c: use bio_get_base

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Date:	Tue,  5 Apr 2016 20:07:33 +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>,
	Boaz Harrosh <boaz@...xistor.com>,
	Ming Lei <tom.leiming@...il.com>,
	Alasdair Kergon <agk@...hat.com>,
	Mike Snitzer <snitzer@...hat.com>,
	dm-devel@...hat.com (maintainer:DEVICE-MAPPER (LVM)),
	Shaohua Li <shli@...nel.org>,
	linux-raid@...r.kernel.org (open list:SOFTWARE RAID (Multiple Disks)
	SUPPORT)
Subject: [PATCH 18/27] dm: dm-io.c: use bio_get_base_vec()

Signed-off-by: Ming Lei <tom.leiming@...il.com>
---
 drivers/md/dm-io.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 06d426e..6b0e466 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -221,7 +221,12 @@ static void bio_dp_init(struct dpages *dp, struct bio *bio)
 {
 	dp->get_page = bio_get_page;
 	dp->next_page = bio_next_page;
-	dp->context_ptr = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter);
+
+	/*
+	 * need to fix both bio_get_page() and bio_next_page()
+	 * before multipage bvecs
+	 */
+	dp->context_ptr = bio_get_base_vec(bio);
 	dp->context_u = bio->bi_iter.bi_bvec_done;
 }
 
-- 
1.9.1