[PATCH 3.15 21/61] udp: ipv4: do not waste time in __udp4_lib_mcast_demux_lookup

3.15-stable review patch. If anyone has any objections, please let me know. -- From: Eric Dumazet [ Upstream commit 63c6f81cdde58c41da62a8d8a209592e42a0203e ] Its too easy to add thousand of UDP sockets on a particular bucket, and slow down an innocent multicast receiver.

[PATCH 3.15 21/61] udp: ipv4: do not waste time in __udp4_lib_mcast_demux_lookup

3.15-stable review patch. If anyone has any objections, please let me know. -- From: Eric Dumazet eduma...@google.com [ Upstream commit 63c6f81cdde58c41da62a8d8a209592e42a0203e ] Its too easy to add thousand of UDP sockets on a particular bucket, and slow down an innocent