mainline inclusion
from mainline-5.11-rc1
commit 6aef10a4
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5EUVD
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6aef10a481a3f42c8021fe410e07440c0d71a5fc

-------------------------------------------------

Refactor low-level API for BPF program loading to not rely on public API
types. This allows painless extension without constant efforts to cleverly not
break backwards compatibility.
Signed-off-by: NAndrii Nakryiko <andrii@kernel.org>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201203204634.1325171-12-andrii@kernel.org
(cherry picked from commit 6aef10a4)
Signed-off-by: NWang Yufen <wangyufen@huawei.com>

Conflicts:
	tools/lib/bpf/bpf.c
	tools/lib/bpf/libbpf.c
Signed-off-by: NWang Yufen <wangyufen@huawei.com>