New files:

Modified files:
tools/lib/bpf/btf.c
tools/lib/bpf/btf.h
tools/bpf/bpftool/Documentation/bpftool-btf.rst
scripts/Makefile.btf
include/uapi/linux/btf.h
tools/bpf/bpftool/bash-completion/bpftool
tools/bpf/bpftool/btf.c
kernel/bpf/btf.c
tools/include/uapi/linux/btf.h
tools/lib/bpf/libbpf.map