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vDSO: Make clockmode constants available without CONFIG_GENERIC_GETTIMEOFDAY

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Some code, for example clocksource drivers, may want to use the vDSO
clockmode constants even when CONFIG_GENERIC_GETTIMEOFDAY=n.
But the symbols are completely hidden in that case, making ugly
ifdeffery necessary.

Always provide the enum definitions.

As not all architectures provide asm/vdso/clocksource.h,
provide an empty stub in asm-generic for it.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260724-vdso-arch-clockmodes-v4-2-ddbe447be860@linutronix.de
This commit is contained in:
Thomas Weißschuh 2026-07-24 15:36:19 +02:00 committed by Thomas Gleixner
parent 2d69b891e6
commit 1bafc1f659
3 changed files with 2 additions and 3 deletions
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1
include/asm-generic/Kbuild
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@ -62,6 +62,7 @@ mandatory-y += topology.h
mandatory-y += trace_clock.h
mandatory-y += uaccess.h
mandatory-y += unwind_user.h
mandatory-y += vdso/clocksource.h
mandatory-y += vermagic.h
mandatory-y += vga.h
mandatory-y += video.h

0
include/asm-generic/vdso/clocksource.h Normal file
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4
include/vdso/clocksource.h
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@ -4,13 +4,11 @@
#include <vdso/limits.h>
#ifdef CONFIG_GENERIC_GETTIMEOFDAY
#include <asm/vdso/clocksource.h>
#endif /* CONFIG_GENERIC_GETTIMEOFDAY */
enum vdso_clock_mode {
VDSO_CLOCKMODE_NONE,
#ifdef CONFIG_GENERIC_GETTIMEOFDAY
#ifdef VDSO_ARCH_CLOCKMODES
VDSO_ARCH_CLOCKMODES,
#endif
VDSO_CLOCKMODE_MAX,