btrfs: reduce uuid_mutex critical section while scanning devices
authorAnand Jain <anand.jain@oracle.com>
Thu, 12 Apr 2018 02:29:24 +0000 (10:29 +0800)
committerDavid Sterba <dsterba@suse.com>
Mon, 28 May 2018 16:23:12 +0000 (18:23 +0200)
The generic block device lookup or cleanup does not need the uuid mutex,
that's only for the device_list_add.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>

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