WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#19: 
new file mode 100644

WARNING: do not add new typedefs
#31: FILE: tools/testing/selftests/bpf/prog_tests/arena_spin_lock.c:8:
+typedef struct qspinlock arena_spinlock_t;

WARNING: Missing a blank line after declarations
#49: FILE: tools/testing/selftests/bpf/prog_tests/arena_spin_lock.c:26:
+	int err, prog_fd = *(u32 *)arg;
+	LIBBPF_OPTS(bpf_test_run_opts, topts,

CHECK: Alignment should match open parenthesis
#50: FILE: tools/testing/selftests/bpf/prog_tests/arena_spin_lock.c:27:
+	LIBBPF_OPTS(bpf_test_run_opts, topts,
+		.data_in = &pkt_v4,

WARNING: line length of 99 exceeds 80 columns
#58: FILE: tools/testing/selftests/bpf/prog_tests/arena_spin_lock.c:35:
+	ASSERT_OK(pthread_setaffinity_np(pthread_self(), sizeof(cpuset), &cpuset), "cpu affinity");

WARNING: line length of 87 exceeds 80 columns
#101: FILE: tools/testing/selftests/bpf/prog_tests/arena_spin_lock.c:78:
+		err = pthread_create(&thread_id[i], NULL, &spin_lock_thread, &prog_fd);

WARNING: line length of 81 exceeds 80 columns
#107: FILE: tools/testing/selftests/bpf/prog_tests/arena_spin_lock.c:84:
+		if (!ASSERT_OK(pthread_join(thread_id[i], &ret), "pthread_join"))

WARNING: void function return statements are not generally useful
#117: FILE: tools/testing/selftests/bpf/prog_tests/arena_spin_lock.c:94:
+	return;
+}

ERROR: do not use assignment in if condition
#174: FILE: tools/testing/selftests/bpf/progs/arena_spin_lock.c:39:
+	if ((ret = arena_spin_lock_irqsave(&lock, flags)))

total: 1 errors, 7 warnings, 1 checks, 155 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 0f6949bdb6a8 ("selftests/bpf: Add tests for arena spin lock") 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.