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arm64: vdso32: Respect COMPAT_32BIT_TIME

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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.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260702-vdso-compat_32bit_time-v3-4-db9f36d8d432@linutronix.de
This commit is contained in:
Thomas Weißschuh
2026-07-07 23:52:53 +02:00
committed by Thomas Gleixner
parent 1a4660da31
commit abb1537388
2 changed files with 10 additions and 6 deletions
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arch/arm64/kernel/vdso32/vdso.lds.S
+2
View File
@@ -82,9 +82,11 @@ 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: *;
arch/arm64/kernel/vdso32/vgettimeofday.c
+8 -6
View File
@@ -8,16 +8,17 @@
#define BUILD_VDSO32_64
#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,
@@ -25,11 +26,12 @@ 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)