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Subject: Re: [PATCH 14/19] powerpc: Add ppc_strict_facility_enable boot option
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Anton Blanchard <anton@samba.org>, paulus@samba.org, mpe@ellerman.id.au,
 mikey@neuling.org, cyrilbur@gmail.com, scottwood@freescale.com
Cc: linuxppc-dev@lists.ozlabs.org
Date: Sat, 02 Sep 2017 13:48:03 +1000
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On Thu, 2015-10-29 at 11:44 +1100, Anton Blanchard wrote:
>  
> +extern void msr_check_and_set(unsigned long bits);
> +extern bool strict_msr_control;
> +extern void __msr_check_and_clear(unsigned long bits);
> +static inline void msr_check_and_clear(unsigned long bits)
> +{
> +       if (strict_msr_control)
> +               __msr_check_and_clear(bits);
> +}
> +
>  static inline unsigned long mfvtb (void)

Sounds like a good candidate for a static key...

Cheers,
Ben.