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Commit f49843afde (selftests/bpf: Add tests for css_task iter combining with cgroup iter) added a test which demonstrates how css_task iter can be combined with cgroup iter. That test used bpf_cgroup_from_id() to convert bpf_iter__cgroup->cgroup to a trusted ptr which is pointless now, since with the previous fix, we can get a trusted cgroup directly from bpf_iter__cgroup. Signed-off-by: Chuyi Zhou <zhouchuyi@bytedance.com> Acked-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20231107132204.912120-3-zhouchuyi@bytedance.com Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>