WARNING: Improper SPDX comment style for 'tools/testing/selftests/bpf/libarena/selftests/test_progs_compat.h', please use '/*' instead
#83: FILE: tools/testing/selftests/bpf/libarena/selftests/test_progs_compat.h:1:
+// SPDX-License-Identifier: LGPL-2.1 OR BSD-2-Clause

WARNING: Missing or malformed SPDX-License-Identifier tag in line 1
#83: FILE: tools/testing/selftests/bpf/libarena/selftests/test_progs_compat.h:1:
+// SPDX-License-Identifier: LGPL-2.1 OR BSD-2-Clause

WARNING: line length of 99 exceeds 80 columns
#90: FILE: tools/testing/selftests/bpf/libarena/selftests/test_progs_compat.h:8:
+#define __test_tag(tag)		__attribute__((btf_decl_tag("comment:" XSTR(__COUNTER__) ":" tag)))

CHECK: Alignment should match open parenthesis
#142: FILE: tools/testing/selftests/bpf/test_loader.c:806:
+	ret = bpf_prog_stream_read(prog_fd, 2, buf, TEST_LOADER_LOG_BUF_SZ - 1,
+				    &ropts);

total: 0 errors, 3 warnings, 1 checks, 141 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 cad57a68f86a ("selftests/bpf: Reuse stderr parsing for libarena ASAN tests") 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, 3 warnings, 1 checks, 141 lines checked