linux-kernel - Re: [PATCH v3] x86/mm/mpx: Work around MPX erratum SKD046

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Date:	Thu, 5 May 2016 09:26:23 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Dave Hansen <dave@...1.net>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org, luto@...capital.net,
	torvalds@...ux-foundation.org,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH v3] x86/mm/mpx: Work around MPX erratum SKD046


* Ingo Molnar <mingo@...nel.org> wrote:

> > -#if defined(CONFIG_CPU_SUP_INTEL) && defined(CONFIG_X86_32)
> > +#if defined(CONFIG_CPU_SUP_INTEL)
> > +void check_mpx_erratum(struct cpuinfo_x86 *c);
> > +#else
> > +static inline void check_mpx_erratum(struct cpuinfo_x86 *c) {}
> > +#if defined(CONFIG_X86_32)
> >  int ppro_with_ram_bug(void);
> >  #else
> >  static inline int ppro_with_ram_bug(void) { return 0; }
> > -#endif
> > +#endif /* CONFIG_X86_32 */
> > +#endif /* CONFIG_CPU_SUP_INTEL */

Sigh. So this broke the ppro_with_ram_bug() definition, because in the new code 
you put it into the wrong branch, breaking the build ...

I've dropped this for now, please fix and test the v3 version of the patch I sent 
and re-send.

Thanks,

	Ingo