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Date: Thu, 18 Nov 2021 10:40:09 -0800
From: Nick Desaulniers <ndesaulniers@...gle.com>
To: Anders Roxell <anders.roxell@...aro.org>
Cc: shuah@...nel.org, fenghua.yu@...el.com, reinette.chatre@...el.com,
john.stultz@...aro.org, tglx@...utronix.de,
akpm@...ux-foundation.org, nathan@...nel.org,
linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
linux-mm@...ck.org, llvm@...ts.linux.dev, christian@...uner.io
Subject: Re: [PATCH v3 1/2] selftests: kselftest.h: mark functions with 'noreturn'
On Thu, Nov 18, 2021 at 1:58 AM Anders Roxell <anders.roxell@...aro.org> wrote:
>
> When building kselftests/capabilities the following warning shows up:
>
> clang -O2 -g -std=gnu99 -Wall test_execve.c -lcap-ng -lrt -ldl -o test_execve
> test_execve.c:121:13: warning: variable 'have_outer_privilege' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> test_execve.c:136:9: note: uninitialized use occurs here
> return have_outer_privilege;
> ^~~~~~~~~~~~~~~~~~~~
> test_execve.c:121:9: note: remove the 'if' if its condition is always true
> } else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> test_execve.c:94:27: note: initialize the variable 'have_outer_privilege' to silence this warning
> bool have_outer_privilege;
> ^
> = false
>
> Rework so all the ksft_exit_*() functions have attribue
> '__attribute__((noreturn))' so the compiler knows that there wont be
> any return from the function. That said, without
> '__attribute__((noreturn))' the compiler warns about the above issue
> since it thinks that it will get back from the ksft_exit_skip()
> function, which it wont.
> Cleaning up the callers that rely on ksft_exit_*() return code, since
> the functions ksft_exit_*() have never returned anything.
>
> Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
> Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
> ---
> tools/testing/selftests/clone3/clone3.c | 4 +++-
> .../testing/selftests/clone3/clone3_clear_sighand.c | 2 +-
> tools/testing/selftests/clone3/clone3_set_tid.c | 4 +++-
> tools/testing/selftests/ipc/msgque.c | 10 +++++-----
> tools/testing/selftests/kcmp/kcmp_test.c | 2 +-
> tools/testing/selftests/kselftest.h | 12 ++++++------
> .../membarrier/membarrier_test_multi_thread.c | 2 +-
> .../membarrier/membarrier_test_single_thread.c | 2 +-
> tools/testing/selftests/pidfd/pidfd_fdinfo_test.c | 2 +-
> tools/testing/selftests/pidfd/pidfd_open_test.c | 4 +++-
> tools/testing/selftests/pidfd/pidfd_poll_test.c | 2 +-
> tools/testing/selftests/pidfd/pidfd_test.c | 2 +-
> tools/testing/selftests/resctrl/resctrl_tests.c | 6 +++---
> tools/testing/selftests/sync/sync_test.c | 2 +-
> tools/testing/selftests/timers/adjtick.c | 4 ++--
> tools/testing/selftests/timers/alarmtimer-suspend.c | 4 ++--
> tools/testing/selftests/timers/change_skew.c | 4 ++--
> tools/testing/selftests/timers/clocksource-switch.c | 4 ++--
> tools/testing/selftests/timers/freq-step.c | 4 ++--
> tools/testing/selftests/timers/inconsistency-check.c | 4 ++--
> tools/testing/selftests/timers/leap-a-day.c | 10 +++++-----
> tools/testing/selftests/timers/leapcrash.c | 4 ++--
> tools/testing/selftests/timers/mqueue-lat.c | 4 ++--
> tools/testing/selftests/timers/nanosleep.c | 4 ++--
> tools/testing/selftests/timers/nsleep-lat.c | 4 ++--
> tools/testing/selftests/timers/posix_timers.c | 12 ++++++------
> tools/testing/selftests/timers/raw_skew.c | 6 +++---
> tools/testing/selftests/timers/set-2038.c | 4 ++--
> tools/testing/selftests/timers/set-tai.c | 4 ++--
> tools/testing/selftests/timers/set-timer-lat.c | 4 ++--
> tools/testing/selftests/timers/set-tz.c | 4 ++--
> tools/testing/selftests/timers/skew_consistency.c | 4 ++--
> tools/testing/selftests/timers/threadtest.c | 2 +-
> tools/testing/selftests/timers/valid-adjtimex.c | 6 +++---
> tools/testing/selftests/vm/madv_populate.c | 2 +-
> 35 files changed, 80 insertions(+), 74 deletions(-)
>
> diff --git a/tools/testing/selftests/clone3/clone3.c b/tools/testing/selftests/clone3/clone3.c
> index 42be3b925830..ede5da0c67b4 100644
> --- a/tools/testing/selftests/clone3/clone3.c
> +++ b/tools/testing/selftests/clone3/clone3.c
> @@ -191,5 +191,7 @@ int main(int argc, char *argv[])
> test_clone3(CLONE_NEWPID, getpagesize() + 8, -E2BIG,
> CLONE3_ARGS_NO_TEST);
>
> - return !ksft_get_fail_cnt() ? ksft_exit_pass() : ksft_exit_fail();
> + if (ksft_get_fail_cnt())
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/clone3/clone3_clear_sighand.c b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> index 47a8c0fc3676..dcd9448eaeec 100644
> --- a/tools/testing/selftests/clone3/clone3_clear_sighand.c
> +++ b/tools/testing/selftests/clone3/clone3_clear_sighand.c
> @@ -124,5 +124,5 @@ int main(int argc, char **argv)
>
> test_clone3_clear_sighand();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/clone3/clone3_set_tid.c b/tools/testing/selftests/clone3/clone3_set_tid.c
> index 0229e9ebb995..a755fcd3af89 100644
> --- a/tools/testing/selftests/clone3/clone3_set_tid.c
> +++ b/tools/testing/selftests/clone3/clone3_set_tid.c
> @@ -393,5 +393,7 @@ int main(int argc, char *argv[])
> out:
> ret = 0;
>
> - return !ret ? ksft_exit_pass() : ksft_exit_fail();
> + if (ret)
> + ksft_exit_fail();
> + ksft_exit_pass();
err...did you update clone3_set_tid as Shuah requested in v3?
Otherwise what changed from v2 -> v3?
> }
> diff --git a/tools/testing/selftests/ipc/msgque.c b/tools/testing/selftests/ipc/msgque.c
> index 656c43c24044..21dd6af76b21 100644
> --- a/tools/testing/selftests/ipc/msgque.c
> +++ b/tools/testing/selftests/ipc/msgque.c
> @@ -198,13 +198,13 @@ int main(int argc, char **argv)
> struct msgque_data msgque;
>
> if (getuid() != 0)
> - return ksft_exit_skip(
> + ksft_exit_skip(
> "Please run the test as root - Exiting.\n");
>
> msgque.key = ftok(argv[0], 822155650);
> if (msgque.key == -1) {
> printf("Can't make key: %d\n", -errno);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
>
> msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666);
> @@ -243,13 +243,13 @@ int main(int argc, char **argv)
> printf("Failed to test queue: %d\n", err);
> goto err_out;
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
>
> err_destroy:
> if (msgctl(msgque.msq_id, IPC_RMID, NULL)) {
> printf("Failed to destroy queue: %d\n", -errno);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> err_out:
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> diff --git a/tools/testing/selftests/kcmp/kcmp_test.c b/tools/testing/selftests/kcmp/kcmp_test.c
> index 6ea7b9f37a41..4e0776c044d1 100644
> --- a/tools/testing/selftests/kcmp/kcmp_test.c
> +++ b/tools/testing/selftests/kcmp/kcmp_test.c
> @@ -162,5 +162,5 @@ int main(int argc, char **argv)
>
> waitpid(pid2, &status, P_ALL);
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/kselftest.h b/tools/testing/selftests/kselftest.h
> index 8d50483fe204..e47f634bf5c0 100644
> --- a/tools/testing/selftests/kselftest.h
> +++ b/tools/testing/selftests/kselftest.h
> @@ -207,13 +207,13 @@ static inline void ksft_test_result_error(const char *msg, ...)
> va_end(args);
> }
>
> -static inline int ksft_exit_pass(void)
> +static inline void __attribute__((noreturn)) ksft_exit_pass(void)
> {
> ksft_print_cnts();
> exit(KSFT_PASS);
> }
>
> -static inline int ksft_exit_fail(void)
> +static inline void __attribute__((noreturn)) ksft_exit_fail(void)
> {
> ksft_print_cnts();
> exit(KSFT_FAIL);
> @@ -231,7 +231,7 @@ static inline int ksft_exit_fail(void)
> ksft_exit_fail(); \
> } while (0)
>
> -static inline int ksft_exit_fail_msg(const char *msg, ...)
> +static inline void __attribute__((noreturn)) ksft_exit_fail_msg(const char *msg, ...)
> {
> int saved_errno = errno;
> va_list args;
> @@ -246,19 +246,19 @@ static inline int ksft_exit_fail_msg(const char *msg, ...)
> exit(KSFT_FAIL);
> }
>
> -static inline int ksft_exit_xfail(void)
> +static inline void __attribute__((noreturn)) ksft_exit_xfail(void)
> {
> ksft_print_cnts();
> exit(KSFT_XFAIL);
> }
>
> -static inline int ksft_exit_xpass(void)
> +static inline void __attribute__((noreturn)) ksft_exit_xpass(void)
> {
> ksft_print_cnts();
> exit(KSFT_XPASS);
> }
>
> -static inline int ksft_exit_skip(const char *msg, ...)
> +static inline void __attribute__((noreturn)) ksft_exit_skip(const char *msg, ...)
> {
> int saved_errno = errno;
> va_list args;
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> index ac5613e5b0eb..b055625e4eb5 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_multi_thread.c
> @@ -69,5 +69,5 @@ int main(int argc, char **argv)
> /* Multi-threaded */
> test_mt_membarrier();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> index c1c963902854..daec48e0b6f2 100644
> --- a/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> +++ b/tools/testing/selftests/membarrier/membarrier_test_single_thread.c
> @@ -20,5 +20,5 @@ int main(int argc, char **argv)
>
> test_membarrier_success();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> index 22558524f71c..d6c5cfd1c4c6 100644
> --- a/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_fdinfo_test.c
> @@ -292,5 +292,5 @@ int main(int argc, char **argv)
> test_pidfd_fdinfo_nspid();
> test_pidfd_dead_fdinfo();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_open_test.c b/tools/testing/selftests/pidfd/pidfd_open_test.c
> index 8a59438ccc78..c62564c264b1 100644
> --- a/tools/testing/selftests/pidfd/pidfd_open_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_open_test.c
> @@ -159,5 +159,7 @@ int main(int argc, char **argv)
> if (pidfd >= 0)
> close(pidfd);
>
> - return !ret ? ksft_exit_pass() : ksft_exit_fail();
> + if (ret)
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_poll_test.c b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> index 610811275357..55d74a50358f 100644
> --- a/tools/testing/selftests/pidfd/pidfd_poll_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_poll_test.c
> @@ -112,5 +112,5 @@ int main(int argc, char **argv)
> }
>
> ksft_test_result_pass("pidfd poll test: pass\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/pidfd/pidfd_test.c b/tools/testing/selftests/pidfd/pidfd_test.c
> index 529eb700ac26..4a4ab7e25796 100644
> --- a/tools/testing/selftests/pidfd/pidfd_test.c
> +++ b/tools/testing/selftests/pidfd/pidfd_test.c
> @@ -569,5 +569,5 @@ int main(int argc, char **argv)
> test_pidfd_send_signal_exited_fail();
> test_pidfd_send_signal_recycled_pid_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
> index 973f09a66e1e..e1cf5a73571b 100644
> --- a/tools/testing/selftests/resctrl/resctrl_tests.c
> +++ b/tools/testing/selftests/resctrl/resctrl_tests.c
> @@ -205,7 +205,7 @@ int main(int argc, char **argv)
> * 2. We execute perf commands
> */
> if (geteuid() != 0)
> - return ksft_exit_fail_msg("Not running as root, abort testing.\n");
> + ksft_exit_fail_msg("Not running as root, abort testing.\n");
>
> /* Detect AMD vendor */
> detect_amd();
> @@ -235,7 +235,7 @@ int main(int argc, char **argv)
> sprintf(bm_type, "fill_buf");
>
> if (!check_resctrlfs_support())
> - return ksft_exit_fail_msg("resctrl FS does not exist\n");
> + ksft_exit_fail_msg("resctrl FS does not exist\n");
>
> filter_dmesg();
>
> @@ -255,5 +255,5 @@ int main(int argc, char **argv)
>
> umount_resctrlfs();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/sync/sync_test.c b/tools/testing/selftests/sync/sync_test.c
> index 414a617db993..aec7057696de 100644
> --- a/tools/testing/selftests/sync/sync_test.c
> +++ b/tools/testing/selftests/sync/sync_test.c
> @@ -110,5 +110,5 @@ int main(void)
> err, ksft_test_num());
>
> /* need this return to keep gcc happy */
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/adjtick.c b/tools/testing/selftests/timers/adjtick.c
> index 54d8d87f36b3..594c59497015 100644
> --- a/tools/testing/selftests/timers/adjtick.c
> +++ b/tools/testing/selftests/timers/adjtick.c
> @@ -205,7 +205,7 @@ int main(int argv, char **argc)
> adjtimex(&tx1);
>
> if (err)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/alarmtimer-suspend.c b/tools/testing/selftests/timers/alarmtimer-suspend.c
> index 4da09dbf83ba..9ac0c098b20f 100644
> --- a/tools/testing/selftests/timers/alarmtimer-suspend.c
> +++ b/tools/testing/selftests/timers/alarmtimer-suspend.c
> @@ -173,6 +173,6 @@ int main(void)
> timer_delete(tm1);
> }
> if (final_ret)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/change_skew.c b/tools/testing/selftests/timers/change_skew.c
> index c4eab7124990..89c97c8b8e91 100644
> --- a/tools/testing/selftests/timers/change_skew.c
> +++ b/tools/testing/selftests/timers/change_skew.c
> @@ -89,8 +89,8 @@ int main(int argv, char **argc)
>
> if (ret) {
> printf("[FAIL]");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/clocksource-switch.c b/tools/testing/selftests/timers/clocksource-switch.c
> index ef8eb3604595..ba4c7f66959b 100644
> --- a/tools/testing/selftests/timers/clocksource-switch.c
> +++ b/tools/testing/selftests/timers/clocksource-switch.c
> @@ -163,6 +163,6 @@ int main(int argv, char **argc)
> change_clocksource(orig_clk);
>
> if (status)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/freq-step.c b/tools/testing/selftests/timers/freq-step.c
> index 4b76450d78d1..73b636f89fdc 100644
> --- a/tools/testing/selftests/timers/freq-step.c
> +++ b/tools/testing/selftests/timers/freq-step.c
> @@ -257,7 +257,7 @@ int main(int argc, char **argv)
> set_frequency(0.0);
>
> if (fails)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/inconsistency-check.c b/tools/testing/selftests/timers/inconsistency-check.c
> index 022d3ffe3fbf..71362be52dc8 100644
> --- a/tools/testing/selftests/timers/inconsistency-check.c
> +++ b/tools/testing/selftests/timers/inconsistency-check.c
> @@ -186,8 +186,8 @@ int main(int argc, char *argv[])
> if (!clock_gettime(clockid, &ts)) {
> printf("Consistent %-30s ", clockstring(clockid));
> if (consistency_test(clockid, runtime))
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/leap-a-day.c b/tools/testing/selftests/timers/leap-a-day.c
> index 23eb398c8140..986abbdb1521 100644
> --- a/tools/testing/selftests/timers/leap-a-day.c
> +++ b/tools/testing/selftests/timers/leap-a-day.c
> @@ -268,7 +268,7 @@ int main(int argc, char **argv)
> if (ret < 0) {
> printf("Error: Problem setting STA_INS/STA_DEL!: %s\n",
> time_state_str(ret));
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
>
> /* Validate STA_INS was set */
> @@ -277,7 +277,7 @@ int main(int argc, char **argv)
> if (tx.status != STA_INS && tx.status != STA_DEL) {
> printf("Error: STA_INS/STA_DEL not set!: %s\n",
> time_state_str(ret));
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
>
> if (tai_time) {
> @@ -295,7 +295,7 @@ int main(int argc, char **argv)
> se.sigev_value.sival_int = 0;
> if (timer_create(CLOCK_REALTIME, &se, &tm1) == -1) {
> printf("Error: timer_create failed\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> its1.it_value.tv_sec = next_leap;
> its1.it_value.tv_nsec = 0;
> @@ -366,7 +366,7 @@ int main(int argc, char **argv)
> if (error_found) {
> printf("Errors observed\n");
> clear_time_state();
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("\n");
> if ((iterations != -1) && !(--iterations))
> @@ -374,5 +374,5 @@ int main(int argc, char **argv)
> }
>
> clear_time_state();
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/leapcrash.c b/tools/testing/selftests/timers/leapcrash.c
> index f70802c5dd0d..8fd065eec904 100644
> --- a/tools/testing/selftests/timers/leapcrash.c
> +++ b/tools/testing/selftests/timers/leapcrash.c
> @@ -87,7 +87,7 @@ int main(void)
> tv.tv_usec = 0;
> if (settimeofday(&tv, NULL)) {
> printf("Error: You're likely not running with proper (ie: root) permissions\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> tx.modes = 0;
> adjtimex(&tx);
> @@ -104,5 +104,5 @@ int main(void)
> fflush(stdout);
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/mqueue-lat.c b/tools/testing/selftests/timers/mqueue-lat.c
> index 7916cf5cc6ff..f3179a605bba 100644
> --- a/tools/testing/selftests/timers/mqueue-lat.c
> +++ b/tools/testing/selftests/timers/mqueue-lat.c
> @@ -107,8 +107,8 @@ int main(int argc, char **argv)
> ret = mqueue_lat_test();
> if (ret < 0) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c
> index 71b5441c2fd9..40ff3d710d66 100644
> --- a/tools/testing/selftests/timers/nanosleep.c
> +++ b/tools/testing/selftests/timers/nanosleep.c
> @@ -153,7 +153,7 @@ int main(int argc, char **argv)
> }
> if (ret < 0) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> length *= 100;
> }
> @@ -161,5 +161,5 @@ int main(int argc, char **argv)
> next:
> ret = 0;
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/nsleep-lat.c b/tools/testing/selftests/timers/nsleep-lat.c
> index eb3e79ed7b4a..4c201a06cb94 100644
> --- a/tools/testing/selftests/timers/nsleep-lat.c
> +++ b/tools/testing/selftests/timers/nsleep-lat.c
> @@ -172,9 +172,9 @@ int main(int argc, char **argv)
> }
> if (ret < 0) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]\n");
> }
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/posix_timers.c b/tools/testing/selftests/timers/posix_timers.c
> index 0ba500056e63..337424c5c987 100644
> --- a/tools/testing/selftests/timers/posix_timers.c
> +++ b/tools/testing/selftests/timers/posix_timers.c
> @@ -194,16 +194,16 @@ int main(int argc, char **argv)
> printf("based timers if other threads run on the CPU...\n");
>
> if (check_itimer(ITIMER_VIRTUAL) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (check_itimer(ITIMER_PROF) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (check_itimer(ITIMER_REAL) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (check_timer_create(CLOCK_THREAD_CPUTIME_ID) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> /*
> * It's unfortunately hard to reliably test a timer expiration
> @@ -215,7 +215,7 @@ int main(int argc, char **argv)
> * find a better solution.
> */
> if (check_timer_create(CLOCK_PROCESS_CPUTIME_ID) < 0)
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/raw_skew.c b/tools/testing/selftests/timers/raw_skew.c
> index b41d8dd0c40c..b58639a7d19d 100644
> --- a/tools/testing/selftests/timers/raw_skew.c
> +++ b/tools/testing/selftests/timers/raw_skew.c
> @@ -138,11 +138,11 @@ int main(int argv, char **argc)
> if (tx1.offset || tx2.offset ||
> tx1.freq != tx2.freq || tx1.tick != tx2.tick) {
> printf(" [SKIP]\n");
> - return ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
> + ksft_exit_skip("The clock was adjusted externally. Shutdown NTPd or other time sync daemons\n");
> }
> printf(" [FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf(" [OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-2038.c b/tools/testing/selftests/timers/set-2038.c
> index 688cfd81b531..f7d978721b9e 100644
> --- a/tools/testing/selftests/timers/set-2038.c
> +++ b/tools/testing/selftests/timers/set-2038.c
> @@ -128,6 +128,6 @@ int main(int argc, char *argv[])
> /* restore clock */
> settime(start);
> if (ret)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-tai.c b/tools/testing/selftests/timers/set-tai.c
> index 8c4179ee2ca2..5b67462efcd6 100644
> --- a/tools/testing/selftests/timers/set-tai.c
> +++ b/tools/testing/selftests/timers/set-tai.c
> @@ -61,9 +61,9 @@ int main(int argc, char **argv)
> ret = get_tai();
> if (ret != i) {
> printf("[FAILED] expected: %i got %i\n", i, ret);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-timer-lat.c b/tools/testing/selftests/timers/set-timer-lat.c
> index 50da45437daa..7ce240c89b21 100644
> --- a/tools/testing/selftests/timers/set-timer-lat.c
> +++ b/tools/testing/selftests/timers/set-timer-lat.c
> @@ -278,6 +278,6 @@ int main(void)
> ret |= do_timer_oneshot(clock_id, 0);
> }
> if (ret)
> - return ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_fail();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/set-tz.c b/tools/testing/selftests/timers/set-tz.c
> index 62bd33eb16f0..20daaf1782b7 100644
> --- a/tools/testing/selftests/timers/set-tz.c
> +++ b/tools/testing/selftests/timers/set-tz.c
> @@ -102,9 +102,9 @@ int main(int argc, char **argv)
> printf("[OK]\n");
>
> set_tz(min, dst);
> - return ksft_exit_pass();
> + ksft_exit_pass();
>
> err:
> set_tz(min, dst);
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> diff --git a/tools/testing/selftests/timers/skew_consistency.c b/tools/testing/selftests/timers/skew_consistency.c
> index 8066be9aff11..bfeaac8d870d 100644
> --- a/tools/testing/selftests/timers/skew_consistency.c
> +++ b/tools/testing/selftests/timers/skew_consistency.c
> @@ -70,8 +70,8 @@ int main(int argv, char **argc)
>
> if (ret) {
> printf("[FAILED]\n");
> - return ksft_exit_fail();
> + ksft_exit_fail();
> }
> printf("[OK]\n");
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/threadtest.c b/tools/testing/selftests/timers/threadtest.c
> index 80aed4bf06fb..76b38e41d9c7 100644
> --- a/tools/testing/selftests/timers/threadtest.c
> +++ b/tools/testing/selftests/timers/threadtest.c
> @@ -189,5 +189,5 @@ int main(int argc, char **argv)
> /* die */
> if (ret)
> ksft_exit_fail();
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c
> index 5397de708d3c..48804223eb4d 100644
> --- a/tools/testing/selftests/timers/valid-adjtimex.c
> +++ b/tools/testing/selftests/timers/valid-adjtimex.c
> @@ -321,10 +321,10 @@ int validate_set_offset(void)
> int main(int argc, char **argv)
> {
> if (validate_freq())
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> if (validate_set_offset())
> - return ksft_exit_fail();
> + ksft_exit_fail();
>
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> diff --git a/tools/testing/selftests/vm/madv_populate.c b/tools/testing/selftests/vm/madv_populate.c
> index 3ee0e8275600..5f2f8ad32248 100644
> --- a/tools/testing/selftests/vm/madv_populate.c
> +++ b/tools/testing/selftests/vm/madv_populate.c
> @@ -325,5 +325,5 @@ int main(int argc, char **argv)
> if (err)
> ksft_exit_fail_msg("%d out of %d tests failed\n",
> err, ksft_test_num());
> - return ksft_exit_pass();
> + ksft_exit_pass();
> }
> --
> 2.33.0
>
--
Thanks,
~Nick Desaulniers
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