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MIPS: csrc-r4k: Select HAVE_UNSTABLE_SCHED_CLOCK if SMP && 64BIT

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csrc-r4k suffers from SMP synchronization overhead.

Select HAVE_UNSTABLE_SCHED_CLOCK to workaround drift
between the CPUs on the system. HAVE_UNSTABLE_SCHED_CLOCK
requires cmpxchg64, so enable it for 64 bits only.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Jiaxun Yang 2024-06-12 09:54:30 +01:00 committed by Thomas Bogendoerfer
parent 7190401fc5
commit 426fa8e4fe
1 changed files with 1 additions and 0 deletions
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arch/mips/Kconfig
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@ -1084,6 +1084,7 @@ config CSRC_IOASIC
config CSRC_R4K
select CLOCKSOURCE_WATCHDOG if CPU_FREQ
select HAVE_UNSTABLE_SCHED_CLOCK if SMP && 64BIT
bool
config CSRC_SB1250