mainline inclusion
from mainline-5.13-rc1
commit 607b9cc9
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=607b9cc92bd7208338d714a22b8082fe83bcb177

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

Share the timing / signal interruption logic between different
implementations of PROG_TEST_RUN. There is a change in behaviour
as well. We check the loop exit condition before checking for
pending signals. This resolves an edge case where a signal
arrives during the last iteration. Instead of aborting with
EINTR we return the successful result to user space.
Signed-off-by: NLorenz Bauer <lmb@cloudflare.com>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Acked-by: NAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210303101816.36774-2-lmb@cloudflare.com
(cherry picked from commit 607b9cc9)
Signed-off-by: NWang Yufen <wangyufen@huawei.com>

Conflicts:
	net/bpf/test_run.c
Signed-off-by: NWang Yufen <wangyufen@huawei.com>