[CRIU] [PATCH] locks: fix up a device returned by stat() for btrfs (v4)

[Pavel Emelyanov]

On 09/03/2014 11:40 PM, Andrew Vagin wrote:
> BTRFS returns subvolume dev-id instead of superblock dev-id,
> in such case return device obtained from mountinfo (ie subvolume0).
> 
> v2: fix up devices only for btrfs files.
> v3: use phys_stat_dev_match instead of phys_stat_resolve_dev
> v4: fix cosmetic whims
> 
> Reported-by: Mr Jenkins
> Signed-off-by: Andrew Vagin <avagin at openvz.org>

applied