WARNING: line length of 91 exceeds 80 columns
#119: FILE: tools/testing/selftests/bpf/prog_tests/cgrp_kfunc.c:123:
+		if (!ASSERT_GE(cgroup_setup_and_join("cgrp_from_id_ns"), 0, "join cgroup"))

WARNING: line length of 96 exceeds 80 columns
#132: FILE: tools/testing/selftests/bpf/prog_tests/cgrp_kfunc.c:136:
+		if (!ASSERT_EQ(write(pipe_fd[1], &ret, sizeof(ret)), sizeof(ret), "write pipe"))

WARNING: line length of 88 exceeds 80 columns
#141: FILE: tools/testing/selftests/bpf/prog_tests/cgrp_kfunc.c:145:
+		ASSERT_EQ(read(pipe_fd[0], &res, sizeof(res)), sizeof(res), "read res");

total: 0 errors, 3 warnings, 0 checks, 137 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit fca35d1f4897 ("selftests/bpf: Add a test for bpf_cgroup_from_id lookup in non-root cgns") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 3 warnings, 0 checks, 137 lines checked