From ce15c4940c36b96d2614651782e7b2f69b8adb36 Mon Sep 17 00:00:00 2001 From: Anders Roxell Date: Sat, 15 Nov 2025 18:31:02 +0100 Subject: [PATCH 5/5] selftests: vdso: Add clock_getres_time64 syscall test coverage Add testing for the 64-bit clock_getres_time64 syscall on 32-bit systems. This syscall is critical for y2038 safety as it uses 64-bit time values. Wrap the existing SYS_clock_getres syscall test in #ifdef SYS_clock_getres to support architectures that only provide the time64 variant. Move the sys_ts variable declaration inside the #ifdef block since it's only used there. The clock_getres_time64 test is conditionally compiled with #ifdef SYS_clock_getres_time64 and prints resolution values for comparison with the existing vDSO and 32-bit syscall results. This complements the existing clock_getres tests and ensures 64-bit time support on 32-bit ARM architectures. Signed-off-by: Anders Roxell --- tools/testing/selftests/vDSO/vdso_test_abi.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/vDSO/vdso_test_abi.c b/tools/testing/selftests/vDSO/vdso_test_abi.c index c7b056c9838b..6f53e51beab0 100644 --- a/tools/testing/selftests/vDSO/vdso_test_abi.c +++ b/tools/testing/selftests/vDSO/vdso_test_abi.c @@ -173,7 +173,7 @@ static void vdso_test_clock_getres(clockid_t clk_id) return; } - struct __kernel_old_timespec ts, sys_ts; + struct __kernel_old_timespec ts; long ret = VDSO_CALL(vdso_clock_getres, 2, clk_id, &ts); if (ret == 0) { @@ -183,6 +183,9 @@ static void vdso_test_clock_getres(clockid_t clk_id) clock_getres_fail++; } +#ifdef SYS_clock_getres + /* most architectures still provide the old clock_getres */ + struct __kernel_old_timespec sys_ts; ret = syscall(SYS_clock_getres, clk_id, &sys_ts); ksft_print_msg("The clock_getres resolution is %ld %ld\n", @@ -190,6 +193,15 @@ static void vdso_test_clock_getres(clockid_t clk_id) if ((sys_ts.tv_sec != ts.tv_sec) || (sys_ts.tv_nsec != ts.tv_nsec)) clock_getres_fail++; +#endif + +#ifdef SYS_clock_getres_time64 + struct __kernel_timespec sys_ts64; + ret = syscall(SYS_clock_getres_time64, clk_id, &sys_ts64); + ksft_print_msg("The clock_getres_time64 resolution is %lld %lld\n", + (long long)sys_ts64.tv_sec, (long long)sys_ts64.tv_nsec); + +#endif if (clock_getres_fail > 0) { ksft_test_result_fail("%s %s\n", name[3], -- 2.51.0