On Tue, 8 Sep 2020 13:00:00 +1000 Stephen Rothwell wrote:
> Hi all,
>
> After merging the net-next tree, today's linux-next build (powerpc
> ppc64_defconfig) produced this warning:
>
> net/bridge/br_multicast.c: In function 'br_multicast_find_port':
> net/bridge/br_multicast.c:1818:21: warning: unused variable 'br' [-Wunused-variable]
> 1818 | struct net_bridge *br = mp->br;
> | ^~
>
> Introduced by commit
>
> 0436862e417e ("net: bridge: mcast: support for IGMPv3/MLDv2 ALLOW_NEW_SOURCES report")
>
> Maybe turning mlock_dereference into a static inline function would help.
Or perhaps provide a better definition of whatever is making the
reference disappear? RCU_LOCKDEP_WARN()?
Thanks for the report!
