From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:27073 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932174AbdJJWxF (ORCPT ); Tue, 10 Oct 2017 18:53:05 -0400 Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id v9AMr4PE013785 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 10 Oct 2017 22:53:04 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id v9AMr3hw023136 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 10 Oct 2017 22:53:04 GMT Received: from abhmp0014.oracle.com (abhmp0014.oracle.com [141.146.116.20]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id v9AMr3jV011885 for ; Tue, 10 Oct 2017 22:53:03 GMT From: Liu Bo To: linux-btrfs@vger.kernel.org Subject: [PATCH] Btrfs: remove rcu_barrier in btrfs_close_devices Date: Tue, 10 Oct 2017 15:51:02 -0600 Message-Id: <20171010215103.20828-1-bo.li.liu@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: It was introduced because btrfs used to do blkdev_put in a deferred work, now that btrfs has put blkdev in place, this rcu_barrier can be removed. Signed-off-by: Liu Bo --- fs/btrfs/volumes.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 0e8f16c..d983cea 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -958,12 +958,6 @@ int btrfs_close_devices(struct btrfs_fs_devices *fs_devices) __btrfs_close_devices(fs_devices); free_fs_devices(fs_devices); } - /* - * Wait for rcu kworkers under __btrfs_close_devices - * to finish all blkdev_puts so device is really - * free when umount is done. - */ - rcu_barrier(); return ret; } -- 2.9.4