[tip: timers/vdso] x86/vdso: Provide clock_getres_time64() for x86-32

["tip-bot2 for Thomas Weißschuh" <tip-bot2@linutronix.de>]

The following commit has been merged into the timers/vdso branch of tip:

Commit-ID:     21bbfd74044f77a98bbc27ea9e6cb04f4dfd8ee6
Gitweb:        https://git.kernel.org/tip/21bbfd74044f77a98bbc27ea9e6cb04f4dfd8ee6
Author:        Thomas Weißschuh <thomas.weissschuh@linutronix.de>
AuthorDate:    Tue, 23 Dec 2025 07:59:16 +01:00
Committer:     Thomas Gleixner <tglx@kernel.org>
CommitterDate: Tue, 13 Jan 2026 14:42:23 +01:00

x86/vdso: Provide clock_getres_time64() for x86-32

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@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20251223-vdso-compat-time32-v1-5-97ea7a06a543@linutronix.de
---
 arch/x86/entry/vdso/vclock_gettime.c    | 8 ++++++++
 arch/x86/entry/vdso/vdso32/vdso32.lds.S | 1 +
 2 files changed, 9 insertions(+)

diff --git a/arch/x86/entry/vdso/vclock_gettime.c b/arch/x86/entry/vdso/vclock_gettime.c
index 0debc19..027b7e8 100644
--- a/arch/x86/entry/vdso/vclock_gettime.c
+++ b/arch/x86/entry/vdso/vclock_gettime.c
@@ -74,4 +74,12 @@ int __vdso_clock_getres(clockid_t clock, struct old_timespec32 *res)
 
 int clock_getres(clockid_t, struct old_timespec32 *)
 	__attribute__((weak, alias("__vdso_clock_getres")));
+
+int __vdso_clock_getres_time64(clockid_t clock, struct __kernel_timespec *ts)
+{
+	return __cvdso_clock_getres(clock, ts);
+}
+
+int clock_getres_time64(clockid_t, struct __kernel_timespec *)
+	__attribute__((weak, alias("__vdso_clock_getres_time64")));
 #endif
diff --git a/arch/x86/entry/vdso/vdso32/vdso32.lds.S b/arch/x86/entry/vdso/vdso32/vdso32.lds.S
index 8a3be07..6f977c1 100644
--- a/arch/x86/entry/vdso/vdso32/vdso32.lds.S
+++ b/arch/x86/entry/vdso/vdso32/vdso32.lds.S
@@ -28,6 +28,7 @@ VERSION
 		__vdso_time;
 		__vdso_clock_getres;
 		__vdso_clock_gettime64;
+		__vdso_clock_getres_time64;
 		__vdso_getcpu;
 	};