WARNING: line length of 84 exceeds 80 columns
#68: FILE: tools/testing/selftests/bpf/prog_tests/global_data_init.c:315:
+	ASSERT_EQ(skel->bss->percpu_data_sum, 0xc0de * num_cpus, "percpu_data_sum");

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#94: FILE: tools/testing/selftests/bpf/progs/test_global_percpu_data.c:66:
+volatile const __u32 num_cpus = 0;

total: 0 errors, 2 warnings, 0 checks, 103 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 348b64cb54b6 ("selftests/bpf: Add a test to verify bpf_iter for global percpu data") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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, 2 warnings, 0 checks, 103 lines checked