linux-kernel - [PATCH 9/9] MIPS: vdso: Provide getres

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Message-Id: <20251223-vdso-compat-time32-v1-9-97ea7a06a543@linutronix.de>
Date: Tue, 23 Dec 2025 07:59:20 +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 9/9] MIPS: vdso: Provide getres_time64() for 32-bit ABIs

For consistency with __vdso_clock_gettime64() there should also be a
64-bit variant of clock_getres(). This will allow the extension of
CONFIG_COMPAT_32BIT_TIME to the vDSO and finally the removal of 32-bit
time types from the kernel and UAPI.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
---
 arch/mips/vdso/vdso.lds.S      | 1 +
 arch/mips/vdso/vgettimeofday.c | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/arch/mips/vdso/vdso.lds.S b/arch/mips/vdso/vdso.lds.S
index c8bbe56d89cb..5d08be3a6b85 100644
--- a/arch/mips/vdso/vdso.lds.S
+++ b/arch/mips/vdso/vdso.lds.S
@@ -103,6 +103,7 @@ VERSION
 		__vdso_clock_getres;
 #if _MIPS_SIM != _MIPS_SIM_ABI64
 		__vdso_clock_gettime64;
+		__vdso_clock_getres_time64;
 #endif
 #endif
 	local: *;
diff --git a/arch/mips/vdso/vgettimeofday.c b/arch/mips/vdso/vgettimeofday.c
index 604afea3f336..59627f2f51b7 100644
--- a/arch/mips/vdso/vgettimeofday.c
+++ b/arch/mips/vdso/vgettimeofday.c
@@ -46,6 +46,12 @@ int __vdso_clock_gettime64(clockid_t clock,
 	return __cvdso_clock_gettime(clock, ts);
 }

+int __vdso_clock_getres_time64(clockid_t clock,
+			       struct __kernel_timespec *ts)
+{
+	return __cvdso_clock_getres(clock, ts);
+}
+
 #else

 int __vdso_clock_gettime(clockid_t clock,

-- 
2.52.0