rfifolock: no need to get thread identifier when nesting
Signed-off-by: NChanglong Xie <xiecl.fnst@cn.fujitsu.com> Reviewed-by: NDenis V. Lunev <den@openvz.org> Message-id: 1462874348-32396-1-git-send-email-xiecl.fnst@cn.fujitsu.com Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
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