Pickup locks for the BPF interface structure. It's quite possible that bpf(4) descriptors can be added and removed on this interface while we are processing stats.
Pickup locks for the BPF interface structure. It's quite possible that
bpf(4) descriptors can be added and removed on this interface while we
are processing stats.

MFC after:	2 weeks

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase