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vdso/vsyscall: Update auxiliary clock data in the datapage

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Expose the auxiliary clock data so it can be read from the vDSO.

Architectures not using the generic vDSO time framework,
namely SPARC64, are not supported.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250701-vdso-auxclock-v1-11-df7d9f87b9b8@linutronix.de
This commit is contained in:
Thomas Weißschuh
2025-07-01 10:58:05 +02:00
committed by Thomas Gleixner
parent 9b7fc3f145
commit 380b84e168
5 changed files with 66 additions and 0 deletions
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5
kernel/time/namespace.c
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@@ -242,6 +242,11 @@ static void timens_set_vvar_page(struct task_struct *task,
for (i = 0; i < CS_BASES; i++)
timens_setup_vdso_clock_data(&vc[i], ns);
if (IS_ENABLED(CONFIG_POSIX_AUX_CLOCKS)) {
for (i = 0; i < ARRAY_SIZE(vdata->aux_clock_data); i++)
timens_setup_vdso_clock_data(&vdata->aux_clock_data[i], ns);
}
out:
mutex_unlock(&offset_lock);
}