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From: Ming Lei <tom.leiming@gmail.com>
To: Jens Axboe <axboe@fb.com>, linux-kernel@vger.kernel.org
Cc: linux-block@vger.kernel.org,
	Christoph Hellwig <hch@infradead.org>,
	Ming Lei <tom.leiming@gmail.com>,
	Johannes Berg <johannes.berg@intel.com>
Subject: [PATCH v1 32/54] block: introduce bvec_get_last_sp()
Date: Wed, 28 Dec 2016 00:04:41 +0800	[thread overview]
Message-ID: <1482854706-14128-1-git-send-email-tom.leiming@gmail.com> (raw)

BTRFS need to get the last singlepage bvec, so introduce
this helper to make it happy.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
 include/linux/bvec.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index baf379d56106..e9a623067c52 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -206,4 +206,14 @@ static inline void bvec_iter_advance_mp(const struct bio_vec *bv,
 #define bvec_for_each_sp_bvec(sp_bvl, mp_bvec, iter)			\
 	__bvec_for_each_sp_bvec(sp_bvl, mp_bvec, iter, BVEC_ITER_ALL_INIT)
 
+/* get the last singlepage bvec from the multipage bvec  */
+static inline void bvec_get_last_sp(struct bio_vec *mp_bv,
+				    struct bio_vec *sp_bv)
+{
+	struct bvec_iter iter;
+
+	bvec_for_each_sp_bvec(*sp_bv, mp_bv, iter)
+		;
+}
+
 #endif /* __LINUX_BVEC_ITER_H */
-- 
2.7.4

             reply	other threads:[~2016-12-27 16:05 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-27 16:04 Ming Lei [this message]
2016-12-27 16:04 ` [PATCH v1 33/54] block: deal with dirtying pages for multipage bvec Ming Lei
2016-12-27 16:04 ` [PATCH v1 34/54] block: convert to singe/multi page version of bio_for_each_segment_all() Ming Lei
2016-12-27 16:04 ` [PATCH v1 35/54] bcache: convert to bio_for_each_segment_all_sp() Ming Lei
2016-12-27 16:04 ` [PATCH v1 36/54] dm-crypt: don't clear bvec->bv_page in crypt_free_buffer_pages() Ming Lei
2016-12-27 16:04 ` [PATCH v1 37/54] dm-crypt: convert to bio_for_each_segment_all_sp() Ming Lei
2016-12-27 16:04 ` [PATCH v1 38/54] md/raid1.c: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 39/54] fs/mpage: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 40/54] fs/direct-io: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 41/54] ext4: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 42/54] xfs: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 43/54] gfs2: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 44/54] f2fs: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 45/54] exofs: " Ming Lei
2017-01-03 14:58   ` Boaz Harrosh
2016-12-27 16:04 ` [PATCH v1 46/54] fs: crypto: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 47/54] fs/btrfs: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 48/54] fs/block_dev.c: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 49/54] fs/iomap.c: " Ming Lei
2016-12-27 16:04 ` [PATCH v1 50/54] fs/buffer.c: use bvec iterator to truncate the bio Ming Lei
2016-12-27 16:05 ` [PATCH v1 51/54] btrfs: avoid access to .bi_vcnt directly Ming Lei
2016-12-27 16:05 ` [PATCH v1 52/54] btrfs: use bvec_get_last_sp to get the last singlepage bvec Ming Lei
2016-12-27 16:05 ` [PATCH v1 53/54] btrfs: comment on direct access bvec table Ming Lei
2016-12-27 16:05 ` [PATCH v1 54/54] block: enable multipage bvecs Ming Lei

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