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MIPS: csrc-r4k: Only use VDSO_CLOCKMODE_R4K when it is a available

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VDSO_CLOCKMODE_R4K is only defined if CONFIG_GENERIC_GETTIMEOFDAY is
enabled. Right now this is always the case, but it will change soon.

Prepare for the potential unavailability of VDSO_CLOCKMODE_R4K.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Link: https://patch.msgid.link/20260521-vdso-mips-kconfig-v1-5-2f79dcd6c78f@linutronix.de
This commit is contained in:
Thomas Weißschuh 2026-05-21 08:53:19 +02:00 committed by Thomas Gleixner
parent 8ea920c48d
commit f3dc8fb24f
1 changed files with 2 additions and 0 deletions
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2
arch/mips/kernel/csrc-r4k.c
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@ -126,12 +126,14 @@ int __init init_r4k_clocksource(void)
clocksource_mips.rating = 200;
clocksource_mips.rating += clamp(mips_hpt_frequency / 10000000, 0, 99);
#ifdef CONFIG_GENERIC_GETTIMEOFDAY
/*
* R2 onwards makes the count accessible to user mode so it can be used
* by the VDSO (HWREna is configured by configure_hwrena()).
*/
if (cpu_has_mips_r2_r6 && rdhwr_count_usable())
clocksource_mips.vdso_clock_mode = VDSO_CLOCKMODE_R4K;
#endif
clocksource_register_hz(&clocksource_mips, mips_hpt_frequency);