enable BPF Just In Time compiler

modulename: bpf_jit_comp.ko

and/or

bpf_jit_32.ko

and/or

bpf_jit_core.ko

and/or

bpf_jit_comp64.ko

and/or

bpf_jit_comp32.ko

and/or

bpf_jit_asm_32.ko

and/or

bpf_jit_asm.ko

and/or

trampoline.ko

and/or

dispatcher.ko

configname: CONFIG_BPF_JIT

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>enable BPF Just In Time compiler
In linux kernel since version 3 (release Date: 2011-07-21)  
Berkeley Packet Filter filtering capabilities are normally handled
by an interpreter. This option allows kernel to generate a native
code when filter is loaded in memory. This should speedup
packet sniffing (libpcap/tcpdump).

Note, admin should enable this feature changing:
/proc/sys/net/core/bpf_jit_enable
/proc/sys/net/core/bpf_jit_harden (optional)
/proc/sys/net/core/bpf_jit_kallsyms (optional)

source code:
arch/s390/net/bpf_jit_comp.c