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        Mon, 18 Dec 2017 07:29:53 -0500
From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@fb.com>, Christoph Hellwig <hch@infradead.org>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Kent Overstreet <kent.overstreet@gmail.com>
Cc: Huang Ying <ying.huang@intel.com>, linux-kernel@vger.kernel.org,
        linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-mm@kvack.org, Theodore Ts'o <tytso@mit.edu>,
        "Darrick J . Wong" <darrick.wong@oracle.com>,
        Coly Li <colyli@suse.de>, Filipe Manana <fdmanana@gmail.com>,
        Ming Lei <ming.lei@redhat.com>
Subject: [PATCH V4 27/45] block: introduce rq_for_each_segment()
Date: Mon, 18 Dec 2017 20:22:29 +0800
Message-Id: <20171218122247.3488-28-ming.lei@redhat.com>
In-Reply-To: <20171218122247.3488-1-ming.lei@redhat.com>
References: <20171218122247.3488-1-ming.lei@redhat.com>
Sender: linux-block-owner@vger.kernel.org
List-Id: linux-block@vger.kernel.org

There are still cases in which rq_for_each_segment() is required, for
example, loop.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 include/linux/blkdev.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index ecc1a24bb5a2..99c65889fd4f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -911,6 +911,10 @@ struct req_iterator {
 	__rq_for_each_bio(_iter.bio, _rq)			\
 		bio_for_each_page(bvl, _iter.bio, _iter.iter)
 
+#define rq_for_each_segment(bvl, _rq, _iter)			\
+	__rq_for_each_bio(_iter.bio, _rq)			\
+		bio_for_each_segment(bvl, _iter.bio, _iter.iter)
+
 #define rq_iter_last(bvec, _iter)				\
 		(_iter.bio->bi_next == NULL &&			\
 		 bio_iter_last(bvec, _iter.iter))
-- 
2.9.5

From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@fb.com>,
	Christoph Hellwig <hch@infradead.org>,
	Alexander Viro <viro@zeniv.linux.org.uk>,
	Kent Overstreet <kent.overstreet@gmail.com>
Cc: Huang Ying <ying.huang@intel.com>,
	linux-kernel@vger.kernel.org,
	linux-block@vger.kernel.org,
	linux-fsdevel@vger.kernel.org,
	linux-mm@kvack.org,
	Theodore Ts'o <tytso@mit.edu>,
	"Darrick J . Wong" <darrick.wong@oracle.com>,
	Coly Li <colyli@suse.de>,
	Filipe Manana <fdmanana@gmail.com>,
	Ming Lei <ming.lei@redhat.com>
Subject: [PATCH V4 27/45] block: introduce rq_for_each_segment()
Date: Mon, 18 Dec 2017 20:22:29 +0800
Message-Id: <20171218122247.3488-28-ming.lei@redhat.com>
In-Reply-To: <20171218122247.3488-1-ming.lei@redhat.com>
References: <20171218122247.3488-1-ming.lei@redhat.com>
Sender: owner-linux-mm@kvack.org
List-ID: <linux-fsdevel.vger.kernel.org>

There are still cases in which rq_for_each_segment() is required, for
example, loop.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 include/linux/blkdev.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index ecc1a24bb5a2..99c65889fd4f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -911,6 +911,10 @@ struct req_iterator {
 	__rq_for_each_bio(_iter.bio, _rq)			\
 		bio_for_each_page(bvl, _iter.bio, _iter.iter)
 
+#define rq_for_each_segment(bvl, _rq, _iter)			\
+	__rq_for_each_bio(_iter.bio, _rq)			\
+		bio_for_each_segment(bvl, _iter.bio, _iter.iter)
+
 #define rq_iter_last(bvec, _iter)				\
 		(_iter.bio->bi_next == NULL &&			\
 		 bio_iter_last(bvec, _iter.iter))
-- 
2.9.5

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