Re: [PATCH] x86/Hyper-V: Fix build error with CONFIG_HYPERV_TSCPAGE=N

[Tianyu Lan <lantianyu1986@gmail.com>]

On Thu, Aug 22, 2019 at 4:39 PM Vitaly Kuznetsov <vkuznets@redhat.com> wrote:
>
> lantianyu1986@gmail.com writes:
>
> > From: Tianyu Lan <Tianyu.Lan@microsoft.com>
> >
> > Both Hyper-V tsc page and Hyper-V tsc MSR code use variable
> > hv_sched_clock_offset for their sched clock callback and so
> > define the variable regardless of CONFIG_HYPERV_TSCPAGE setting.
>
> CONFIG_HYPERV_TSCPAGE is gone after my "x86/hyper-v: enable TSC page
> clocksource on 32bit" patch. Do we still have an issue to fix?
>
Hi Vtialy:
             Your patch also fixs the build issue. If it's not
necessary to have a dedicated patch
to fix the issue, please ignore it. Thanks.

> >
> > Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
> > ---
> > This patch is based on the top of "git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
> > timers/core".
> >
> >  drivers/clocksource/hyperv_timer.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c
> > index dad8af198e20..c322ab4d3689 100644
> > --- a/drivers/clocksource/hyperv_timer.c
> > +++ b/drivers/clocksource/hyperv_timer.c
> > @@ -22,6 +22,7 @@
> >  #include <asm/mshyperv.h>
> >
> >  static struct clock_event_device __percpu *hv_clock_event;
> > +static u64 hv_sched_clock_offset __ro_after_init;
> >
> >  /*
> >   * If false, we're using the old mechanism for stimer0 interrupts
> > @@ -215,7 +216,6 @@ EXPORT_SYMBOL_GPL(hyperv_cs);
> >  #ifdef CONFIG_HYPERV_TSCPAGE
> >
> >  static struct ms_hyperv_tsc_page tsc_pg __aligned(PAGE_SIZE);
> > -static u64 hv_sched_clock_offset __ro_after_init;
> >
> >  struct ms_hyperv_tsc_page *hv_get_tsc_page(void)
> >  {
>
> --
> Vitaly



-- 
Best regards
Tianyu Lan