It was corrupted in r38528. The most obvious symptom is repeated messages like this:
Tue Sep 8 08:25:18 2015 kern.warn kernel: [77141.972226] br-lan: received packet on wlan0 with own address as source address
Signed-off-by: Dmitry Ivanov <dima@ubnt.com>
Backport of r46821
git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@46822 3c298f89-4303-0410-b956-a3cf2f4a3e73