On Tue, Jul 13, 2021 at 05:01:46PM -0700, Michael Kelley wrote: [...] > > diff --git a/include/clocksource/hyperv_timer.h b/include/clocksource/hyperv_timer.h > index b6774aa..1c566c7 100644 > --- a/include/clocksource/hyperv_timer.h > +++ b/include/clocksource/hyperv_timer.h > @@ -20,6 +20,8 @@ > #define HV_MAX_MAX_DELTA_TICKS 0xffffffff > #define HV_MIN_DELTA_TICKS 1 > > +#ifdef CONFIG_HYPERV_TIMER > + > /* Routines called by the VMbus driver */ > extern int hv_stimer_alloc(bool have_percpu_irqs); > extern int hv_stimer_cleanup(unsigned int cpu); > @@ -28,8 +30,6 @@ > extern void hv_stimer_global_cleanup(void); > extern void hv_stimer0_isr(void); > > -#ifdef CONFIG_HYPERV_TIMER > -extern u64 (*hv_read_reference_counter)(void); > extern void hv_init_clocksource(void); > > extern struct ms_hyperv_tsc_page *hv_get_tsc_page(void); > @@ -100,6 +100,13 @@ static inline u64 hv_read_tsc_page_tsc(const struct ms_hyperv_tsc_page *tsc_pg, > { > return U64_MAX; > } > + > +static inline int hv_stimer_cleanup(unsigned int cpu) {return 0; } Nit: missing space before "return". No need to resend just for this. Wei.