WARNING: line length of 92 exceeds 80 columns
#106: FILE: tools/testing/selftests/bpf/progs/tracing_multi_session_attach.c:8:
+__hidden extern int tracing_multi_arg_check(__u64 *ctx, __u64 *test_result, bool is_return);

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#114: FILE: tools/testing/selftests/bpf/progs/tracing_multi_session_attach.c:16:
+	volatile __u64 *cookie = bpf_session_cookie(ctx);

total: 0 errors, 2 warnings, 0 checks, 90 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 5882b9d38c32 ("selftests/bpf: Add tracing multi session test") 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, 90 lines checked