On Sat, 11 May 2024, Jiaxun Yang wrote: > csrc-r4k suffers from SMP synchronization overhead. [...] > diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig > index f1aa1bf11166..fa8ca0287568 100644 > --- a/arch/mips/Kconfig > +++ b/arch/mips/Kconfig > @@ -1083,6 +1083,7 @@ config CSRC_IOASIC > > config CSRC_R4K > select CLOCKSOURCE_WATCHDOG if CPU_FREQ > + select HAVE_UNSTABLE_SCHED_CLOCK if 64BIT Shouldn't it be: select HAVE_UNSTABLE_SCHED_CLOCK if 64BIT && SMP then? Maciej