WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#43: FILE: tools/testing/selftests/bpf/prog_tests/send_signal.c:26:
+	volatile int j = 0;

WARNING: line length of 83 exceeds 80 columns
#62: FILE: tools/testing/selftests/bpf/prog_tests/send_signal.c:54:
+			ASSERT_NEQ(sigaction(SIGUSR1, &sa, NULL), -1, "sigaction");

WARNING: line length of 88 exceeds 80 columns
#64: FILE: tools/testing/selftests/bpf/prog_tests/send_signal.c:56:
+			ASSERT_NEQ(signal(SIGUSR1, sigusr1_handler), SIG_ERR, "signal");

WARNING: line length of 84 exceeds 80 columns
#81: FILE: tools/testing/selftests/bpf/prog_tests/send_signal.c:70:
+			ASSERT_OK(setpriority(PRIO_PROCESS, 0, -20), "setpriority");

WARNING: line length of 87 exceeds 80 columns
#97: FILE: tools/testing/selftests/bpf/prog_tests/send_signal.c:86:
+					/* trigger the nanosleep tracepoint program. */

WARNING: line length of 89 exceeds 80 columns
#114: FILE: tools/testing/selftests/bpf/prog_tests/send_signal.c:100:
+			ASSERT_OK(setpriority(PRIO_PROCESS, 0, old_prio), "setpriority");

WARNING: line length of 87 exceeds 80 columns
#143: FILE: tools/testing/selftests/bpf/prog_tests/send_signal.c:133:
+			pmu_fd = syscall(__NR_perf_event_open, attr, pid, -1 /* cpu */,

WARNING: line length of 92 exceeds 80 columns
#146: FILE: tools/testing/selftests/bpf/prog_tests/send_signal.c:136:
+			pmu_fd = syscall(__NR_perf_event_open, attr, getpid(), -1 /* cpu */,

WARNING: line length of 81 exceeds 80 columns
#198: FILE: tools/testing/selftests/bpf/prog_tests/send_signal.c:199:
+		ASSERT_OK(setpriority(PRIO_PROCESS, 0, old_prio), "setpriority");

WARNING: line length of 98 exceeds 80 columns
#288: FILE: tools/testing/selftests/bpf/progs/test_send_signal_kern.c:9:
+int bpf_send_signal_task(struct task_struct *task, int sig, enum pid_type type, u64 value) __ksym;

WARNING: line length of 97 exceeds 80 columns
#315: FILE: tools/testing/selftests/bpf/progs/test_send_signal_kern.c:32:
+				ret = bpf_send_signal_task(target_task, sig, PIDTYPE_PID, value);

WARNING: line length of 98 exceeds 80 columns
#320: FILE: tools/testing/selftests/bpf/progs/test_send_signal_kern.c:37:
+				ret = bpf_send_signal_task(target_task, sig, PIDTYPE_TGID, value);

total: 0 errors, 12 warnings, 0 checks, 296 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 c8d0f9e56a2c ("selftests/bpf: Augment send_signal test with remote signaling") 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, 12 warnings, 0 checks, 296 lines checked