WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#21: 
new file mode 100644

CHECK: Alignment should match open parenthesis
#376: FILE: tools/testing/selftests/bpf/prog_tests/test_csum_diff.c:351:
+	LIBBPF_OPTS(bpf_test_run_opts, topts,
+		.data_in = tmp_in,

WARNING: line length of 83 exceeds 80 columns
#408: FILE: tools/testing/selftests/bpf/prog_tests/test_csum_diff.c:383:
+		memcpy(skel->bss->to_buff, tests[i].to_buff, tests[i].to_buff_len);

WARNING: line length of 89 exceeds 80 columns
#409: FILE: tools/testing/selftests/bpf/prog_tests/test_csum_diff.c:384:
+		memcpy(skel->bss->from_buff, tests[i].from_buff, tests[i].from_buff_len);

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#451: FILE: tools/testing/selftests/bpf/progs/csum_diff_test.c:12:
+const volatile unsigned int to_buff_len = 0;

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#453: FILE: tools/testing/selftests/bpf/progs/csum_diff_test.c:14:
+const volatile unsigned int from_buff_len = 0;

WARNING: line length of 81 exceeds 80 columns
#473: FILE: tools/testing/selftests/bpf/progs/csum_diff_test.c:34:
+			       (void *)to_buff, to_buff_len - to_len_half, seed);

WARNING: line length of 98 exceeds 80 columns
#475: FILE: tools/testing/selftests/bpf/progs/csum_diff_test.c:36:
+	result = bpf_csum_diff((void *)from_buff + (from_buff_len - from_len_half), from_len_half,

WARNING: line length of 99 exceeds 80 columns
#476: FILE: tools/testing/selftests/bpf/progs/csum_diff_test.c:37:
+			       (void *)to_buff + (to_buff_len - to_len_half), to_len_half, result);

total: 0 errors, 8 warnings, 1 checks, 450 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 19ff2647f197 ("selftests/bpf: Add a selftest for bpf_csum_diff()") 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, 8 warnings, 1 checks, 450 lines checked