linux-kernel - [RFC PATCH 06/11] iov_iter: Use op_is_write() rather than iterator direction

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Message-ID: <20230630152524.661208-7-dhowells@redhat.com>
Date:   Fri, 30 Jun 2023 16:25:19 +0100
From:   David Howells <dhowells@...hat.com>
To:     Jens Axboe <axboe@...nel.dk>, Al Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>
Cc:     David Howells <dhowells@...hat.com>,
        Matthew Wilcox <willy@...radead.org>, Jan Kara <jack@...e.cz>,
        Jeff Layton <jlayton@...nel.org>,
        David Hildenbrand <david@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Hillf Danton <hdanton@...a.com>,
        Christian Brauner <brauner@...nel.org>,
        linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Christoph Hellwig <hch@....de>,
        Christian Brauner <christian@...uner.io>
Subject: [RFC PATCH 06/11] iov_iter: Use op_is_write() rather than iterator direction

If a request struct is available, use op_is_write() instead of the iterator
direction.

Signed-off-by: David Howells <dhowells@...hat.com>
cc: Christoph Hellwig <hch@....de>
cc: Jens Axboe <axboe@...nel.dk>
cc: Christian Brauner <christian@...uner.io>
cc: Alexander Viro <viro@...iv.linux.org.uk>
cc: linux-block@...r.kernel.org
cc: linux-fsdevel@...r.kernel.org
---
 block/blk-map.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-map.c b/block/blk-map.c
index 44d74a30ddac..f8fe114ae433 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -205,7 +205,7 @@ static int bio_copy_user_iov(struct request *rq, struct rq_map_data *map_data,
 	/*
 	 * success
 	 */
-	if ((iov_iter_rw(iter) == WRITE &&
+	if ((op_is_write(rq->cmd_flags) &&
 	     (!map_data || !map_data->null_mapped)) ||
 	    (map_data && map_data->from_user)) {
 		ret = bio_copy_from_iter(bio, iter);