linux-kernel - [PATCH 4.20 48/76] tun: remove unnecessary memory barrier

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Message-Id: <20190308124916.513867376@linuxfoundation.org>
Date:   Fri,  8 Mar 2019 13:50:00 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Timur Celik <mail@...urcelik.de>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.20 48/76] tun: remove unnecessary memory barrier

4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Timur Celik <mail@...urcelik.de>

[ Upstream commit ecef67cb10db7b83b3b71c61dbb29aa070ab0112 ]

Replace set_current_state with __set_current_state since no memory
barrier is needed at this point.

Signed-off-by: Timur Celik <mail@...urcelik.de>
Reviewed-by: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/tun.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -2165,7 +2165,7 @@ static void *tun_ring_recv(struct tun_fi
 		schedule();
 	}
 
-	set_current_state(TASK_RUNNING);
+	__set_current_state(TASK_RUNNING);
 	remove_wait_queue(&tfile->wq.wait, &wait);
 
 out: