From be9eac48274a2d9b142d6dd8567b9b2362939346 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Michal=20Kube=C4=8Dek?= <mkubecek@suse.cz>
Date: Fri, 15 Nov 2013 06:18:40 +0100
Subject: [PATCH] macvlan: introduce macvlan_dev_real_dev() helper function

Introduce helper function macvlan_dev_real_dev which returns the
underlying device of a macvlan device, similar to vlan_dev_real_dev()
for 802.1q VLAN devices.

v2: IFF_MACVLAN flag and equivalent of is_macvlan_dev() were
introduced in the meantime

v3: do BUG() if compiled without macvlan support

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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