New files:

Modified files:
tools/lib/bpf/libbpf.h
kernel/bpf/log.c
tools/lib/bpf/libbpf.c
tools/lib/bpf/libbpf_internal.h
kernel/bpf/helpers.c
kernel/bpf/verifier.c
include/linux/compiler_types.h
tools/lib/bpf/features.c
include/linux/btf.h
include/linux/bpf_verifier.h