Re: [PATCH v6 02/12] x86/paravirt: switch time pvops functions to use static_call()

[Borislav Petkov <bp@xxxxxxxxx>]

On Tue, Mar 09, 2021 at 02:48:03PM +0100, Juergen Gross wrote:
> @@ -167,6 +168,17 @@ static u64 native_steal_clock(int cpu)
>       return 0;
>  }
>  
> +DEFINE_STATIC_CALL(pv_steal_clock, native_steal_clock);
> +DEFINE_STATIC_CALL(pv_sched_clock, native_sched_clock);
> +
> +bool paravirt_using_native_sched_clock = true;
> +
> +void paravirt_set_sched_clock(u64 (*func)(void))
> +{
> +     static_call_update(pv_sched_clock, func);
> +     paravirt_using_native_sched_clock = (func == native_sched_clock);
> +}

What's the point of this function if there's a global
paravirt_using_native_sched_clock variable now?

Looking how the bit of information whether native_sched_clock is used,
is needed in tsc.c, it probably would be cleaner if you add a

set_sched_clock_native(void);

or so, to tsc.c instead and call that here and make that long var name a
a shorter and static one in tsc.c instead.

Hmm?

-- 
Regards/Gruss,
    Boris.

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