linux-kernel - [PATCH 3/9] selftests: vDSO: vdso_test

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Message-Id: <20251223-vdso-compat-time32-v1-3-97ea7a06a543@linutronix.de>
Date: Tue, 23 Dec 2025 07:59:14 +0100
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Andy Lutomirski <luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, 
 Vincenzo Frascino <vincenzo.frascino@....com>, 
 Shuah Khan <shuah@...nel.org>, Ingo Molnar <mingo@...hat.com>, 
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, 
 x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, 
 Russell King <linux@...linux.org.uk>, 
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
 Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 Russell King <rmk+kernel@...linux.org.uk>, 
 linux-arm-kernel@...ts.infradead.org, linux-mips@...r.kernel.org, 
 Arnd Bergmann <arnd@...db.de>, linux-api@...r.kernel.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH 3/9] selftests: vDSO: vdso_test_abi: Use UAPI system call
 numbers

SYS_clock_getres might have been redirected by libc to some other system
call than the actual clock_getres. In the test we want to make sure to
use exactly this system call.

Use the system call number exported by the UAPI headers which is always
correct.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
---
 tools/testing/selftests/vDSO/vdso_test_abi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/vDSO/vdso_test_abi.c b/tools/testing/selftests/vDSO/vdso_test_abi.c
index c620317eaeea..a75c12dcb0f1 100644
--- a/tools/testing/selftests/vDSO/vdso_test_abi.c
+++ b/tools/testing/selftests/vDSO/vdso_test_abi.c
@@ -179,7 +179,7 @@ static void vdso_test_clock_getres(clockid_t clk_id)
 		clock_getres_fail++;
 	}

-	ret = syscall(SYS_clock_getres, clk_id, &sys_ts);
+	ret = syscall(__NR_clock_getres, clk_id, &sys_ts);

 	ksft_print_msg("The syscall resolution is %lld %lld\n",
 			(long long)sys_ts.tv_sec, (long long)sys_ts.tv_nsec);

-- 
2.52.0