linux-kernel - [PATCH v10 7/7] libceph: use sendpage_ok() in ceph_tcp

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Message-Id: <20201002082734.13925-8-colyli@suse.de>
Date:   Fri,  2 Oct 2020 16:27:34 +0800
From:   Coly Li <colyli@...e.de>
To:     davem@...emloft.net, linux-block@...r.kernel.org,
        linux-nvme@...ts.infradead.org, netdev@...r.kernel.org,
        open-iscsi@...glegroups.com, linux-scsi@...r.kernel.org,
        ceph-devel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Coly Li <colyli@...e.de>,
        Jeff Layton <jlayton@...nel.org>,
        Ilya Dryomov <idryomov@...il.com>
Subject: [PATCH v10 7/7] libceph: use sendpage_ok() in ceph_tcp_sendpage()

In libceph, ceph_tcp_sendpage() does the following checks before handle
the page by network layer's zero copy sendpage method,
	if (page_count(page) >= 1 && !PageSlab(page))

This check is exactly what sendpage_ok() does. This patch replace the
open coded checks by sendpage_ok() as a code cleanup.

Signed-off-by: Coly Li <colyli@...e.de>
Acked-by: Jeff Layton <jlayton@...nel.org>
Cc: Ilya Dryomov <idryomov@...il.com>
---
 net/ceph/messenger.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index bdfd66ba3843..d4d7a0e52491 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -575,7 +575,7 @@ static int ceph_tcp_sendpage(struct socket *sock, struct page *page,
 	 * coalescing neighboring slab objects into a single frag which
 	 * triggers one of hardened usercopy checks.
 	 */
-	if (page_count(page) >= 1 && !PageSlab(page))
+	if (sendpage_ok(page))
 		sendpage = sock->ops->sendpage;
 	else
 		sendpage = sock_no_sendpage;
-- 
2.26.2