linux-kernel - Re: [PATCH] x86: static_cpu_has_safe: discard dynamic check after init

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Message-ID: <20160120150109.GF23350@pd.tnic>
Date:	Wed, 20 Jan 2016 16:01:09 +0100
From:	Borislav Petkov <bp@...e.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Brian Gerst <brgerst@...il.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Andy Lutomirski <luto@...capital.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] x86: static_cpu_has_safe: discard dynamic check after
 init

On Tue, Jan 19, 2016 at 08:02:01PM -0800, H. Peter Anvin wrote:
> 	... "i" (1 << (bit & 7)),
> 	    "m" (((const char *)boot_cpu_data->x86_capability)[bit >> 3]) ...

Nice!

I was going to do:

		"i" (1 << (bit & 31)),
                "m" (((boot_cpu_data->x86_capability)[bit >> 5]))

:-)

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--