BPF_SUB           395 net/bpf_filter.c 		case BPF_ALU|BPF_SUB|BPF_X:
BPF_SUB           429 net/bpf_filter.c 		case BPF_ALU|BPF_SUB|BPF_K:
BPF_SUB           533 net/bpf_filter.c 			case BPF_SUB: