mainline inclusion
from mainline-5.14-rc1
commit e2fa0156
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=e2fa0156a434c140998aa16ecad329e4bc19f263

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Prep libbpf to use FD_IDX kernel feature when generating loader program.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
Acked-by: NAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210514003623.28033-14-alexei.starovoitov@gmail.com
(cherry picked from commit e2fa0156)
Signed-off-by: NWang Yufen <wangyufen@huawei.com>