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The result is as follows: $ tools/testing/selftests/bpf/test_progs --name=task_under_cgroup #237 task_under_cgroup:OK Summary: 1/0 PASSED, 0 SKIPPED, 0 FAILED Without the previous patch, there will be RCU warnings in dmesg when CONFIG_PROVE_RCU is enabled. While with the previous patch, there will be no warnings. Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Stanislav Fomichev <sdf@google.com> Link: https://lore.kernel.org/bpf/20231007135945.4306-2-laoar.shao@gmail.com