time: Build generic update_vsyscall() only with generic time vDSO

The generic vDSO can be used without the time-related functionality.
In that case the generic update_vsyscall() from kernel/time/vsyscall.c
should not be built.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250826-vdso-cleanups-v1-5-d9b65750e49f@linutronix.de

diff --git a/kernel/time/Makefile b/kernel/time/Makefile
index e6e9b85..f7d52d9 100644 (file)
--- a/kernel/time/Makefile
+++ b/kernel/time/Makefile
@@ -26,7 +26,7 @@ obj-$(CONFIG_LEGACY_TIMER_TICK)                       += tick-legacy.o
 ifeq ($(CONFIG_SMP),y)
  obj-$(CONFIG_NO_HZ_COMMON)                    += timer_migration.o
 endif
-obj-$(CONFIG_HAVE_GENERIC_VDSO)                        += vsyscall.o
+obj-$(CONFIG_GENERIC_GETTIMEOFDAY)             += vsyscall.o
 obj-$(CONFIG_DEBUG_FS)                         += timekeeping_debug.o
 obj-$(CONFIG_TEST_UDELAY)                      += test_udelay.o
 obj-$(CONFIG_TIME_NS)                          += namespace.o