CHECK: Comparison to NULL could be written "strstr"
#105: FILE: tools/testing/selftests/bpf/prog_tests/trace_printk.c:15:
+	if (strstr(str, SEARCHMSG_UTF8) != NULL)

WARNING: line length of 84 exceeds 80 columns
#124: FILE: tools/testing/selftests/bpf/prog_tests/trace_printk.c:52:
+	if (!ASSERT_GT(bss->trace_printk_utf8_ran, 0, "bss->trace_printk_utf8_ran"))

WARNING: line length of 84 exceeds 80 columns
#127: FILE: tools/testing/selftests/bpf/prog_tests/trace_printk.c:55:
+	if (!ASSERT_GT(bss->trace_printk_utf8_ret, 0, "bss->trace_printk_utf8_ret"))

CHECK: Alignment should match open parenthesis
#132: FILE: tools/testing/selftests/bpf/prog_tests/trace_printk.c:60:
+	ASSERT_OK(read_trace_pipe_iter(trace_pipe_cb, found, 1000),
 		 "read_trace_pipe_iter");

total: 0 errors, 2 warnings, 2 checks, 110 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 a8d1cb9a2ae6 ("bpf: allow UTF-8 literals in bpf_bprintf_prepare()") 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, 2 checks, 110 lines checked