linux-kernel - [PATCH V4 11/45] dm-crypt: don't clear bvec->bv_page in crypt_free_buffer

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Message-Id: <20171218122247.3488-12-ming.lei@redhat.com>
Date:   Mon, 18 Dec 2017 20:22:13 +0800
From:   Ming Lei <ming.lei@...hat.com>
To:     Jens Axboe <axboe@...com>, Christoph Hellwig <hch@...radead.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Kent Overstreet <kent.overstreet@...il.com>
Cc:     Huang Ying <ying.huang@...el.com>, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, Theodore Ts'o <tytso@....edu>,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        Coly Li <colyli@...e.de>, Filipe Manana <fdmanana@...il.com>,
        Ming Lei <ming.lei@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>
Subject: [PATCH V4 11/45] dm-crypt: don't clear bvec->bv_page in crypt_free_buffer_pages()

The bio is always freed after running crypt_free_buffer_pages(), so it
isn't necessary to clear the bv->bv_page.

Cc: Mike Snitzer <snitzer@...hat.com>
Cc:dm-devel@...hat.com
Signed-off-by: Ming Lei <ming.lei@...hat.com>
---
 drivers/md/dm-crypt.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 9fc12f556534..48332666fc38 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1446,7 +1446,6 @@ static void crypt_free_buffer_pages(struct crypt_config *cc, struct bio *clone)
 	bio_for_each_segment_all(bv, clone, i) {
 		BUG_ON(!bv->bv_page);
 		mempool_free(bv->bv_page, cc->page_pool);
-		bv->bv_page = NULL;
 	}
 }
 
-- 
2.9.5