Messages in this thread | | | Date | Tue, 15 Mar 2016 16:47:31 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH 1/2] x86/mm/pat: Change pat_disable() to emulate PAT table |
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On Tue, Mar 15, 2016 at 09:43:15AM -0600, Toshi Kani wrote: > > Please use on init paths boot_cpu_has(X86_FEATURE_PAT) and on fast paths > > static_cpu_has(X86_FEATURE_PAT). No more of that cpu_has_XXX ugliness. > > 'cpu_has_pat' is defined as 'boot_cpu_has(X86_FEATURE_PAT)'. Do you mean > it should explicitly use 'boot_cpu_has(X86_FEATURE_PAT)'?
No, read what I said.
We use boot_cpu_has(<feature_bit>) on slow paths (i.e., init, bootup, etc), where speed is not that important. static_cpu_has(<feature_bit>) is an optimized version which should be used in hot paths.
-- Regards/Gruss, Boris.
ECO tip #101: Trim your mails when you reply.
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