mainline inclusion
from mainline-5.11-rc1
commit 197389da
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=197389da2fbfbc3cefb229268c32d858d9575c96

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

Add selftest validating ability to programmatically generate and then dump
split BTF.
Signed-off-by: NAndrii Nakryiko <andrii@kernel.org>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NSong Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20201105043402.2530976-6-andrii@kernel.org
(cherry picked from commit 197389da)
Signed-off-by: NWang Yufen <wangyufen@huawei.com>