[PATCH v2 5/9] ARM: VDSO: Respect COMPAT_32BIT_TIME
From: Thomas Weißschuh <hidden>
Date: 2026-06-30 07:38:41
Also in:
linux-api, linux-arm-kernel, linux-mips, lkml, sparclinux
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
If CONFIG_COMPAT_32BIT_TIME is disabled then the vDSO should not provide any 32-bit time related functionality. This is the intended effect of the kconfig option and also the fallback system calls would also not be implemented. Currently the kconfig option does not affect the gettimeofday() syscall, so also keep that in the vDSO. Signed-off-by: Thomas Weißschuh <redacted> --- arch/arm/vdso/vdso.lds.S | 2 ++ arch/arm/vdso/vgettimeofday.c | 14 ++++++++------ 2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/arch/arm/vdso/vdso.lds.S b/arch/arm/vdso/vdso.lds.S
index 74d8d8bc8a40..e61038c0195a 100644
--- a/arch/arm/vdso/vdso.lds.S
+++ b/arch/arm/vdso/vdso.lds.S@@ -70,9 +70,11 @@ VERSION { LINUX_2.6 { global: +#ifdef CONFIG_COMPAT_32BIT_TIME __vdso_clock_gettime; __vdso_gettimeofday; __vdso_clock_getres; +#endif /* CONFIG_COMPAT_32BIT_TIME */ __vdso_clock_gettime64; __vdso_clock_getres_time64; local: *;
diff --git a/arch/arm/vdso/vgettimeofday.c b/arch/arm/vdso/vgettimeofday.c
index f7a2f5dc2fdc..3eebeddbfd18 100644
--- a/arch/arm/vdso/vgettimeofday.c
+++ b/arch/arm/vdso/vgettimeofday.c@@ -10,16 +10,17 @@ #include <asm/unwind.h> #include <vdso/gettime.h> +#ifdef CONFIG_COMPAT_32BIT_TIME int __vdso_clock_gettime(clockid_t clock, struct old_timespec32 *ts) { return __cvdso_clock_gettime32(clock, ts); } -int __vdso_clock_gettime64(clockid_t clock, - struct __kernel_timespec *ts) +int __vdso_clock_getres(clockid_t clock_id, + struct old_timespec32 *res) { - return __cvdso_clock_gettime(clock, ts); + return __cvdso_clock_getres_time32(clock_id, res); } int __vdso_gettimeofday(struct __kernel_old_timeval *tv,
@@ -27,11 +28,12 @@ int __vdso_gettimeofday(struct __kernel_old_timeval *tv, { return __cvdso_gettimeofday(tv, tz); } +#endif /* CONFIG_COMPAT_32BIT_TIME */ -int __vdso_clock_getres(clockid_t clock_id, - struct old_timespec32 *res) +int __vdso_clock_gettime64(clockid_t clock, + struct __kernel_timespec *ts) { - return __cvdso_clock_getres_time32(clock_id, res); + return __cvdso_clock_gettime(clock, ts); } int __vdso_clock_getres_time64(clockid_t clock_id, struct __kernel_timespec *res)
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2.55.0