linux-kernel - Re: [tip:x86/mm] x86, mm: Use a bitfield to mask nuisance get

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Date:	Mon, 11 Feb 2013 20:47:15 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jamie Lokier <jamie@...reable.org>,
	ville.syrjala@...ux.intel.com, Borislav Petkov <bp@...en8.de>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-tip-commits@...r.kernel.org, "H.J. Lu" <hjl.tools@...il.com>
Subject: Re: [tip:x86/mm] x86, mm: Use a bitfield to mask nuisance get_user() warnings

On Mon, Feb 11, 2013 at 8:42 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> But I don't see anything fundamentally wrong with it. Certainly it
> looks much better than the disgusting and warning-prone
>
>     unsigned long long __val_gu8
>
> thing.

Oh. I just realized. That was your _baseline_ in the comparisons, wasn't it?

Can you please make the baseline be the current mainline git version
of <asm/uaccess.h>, not the first "unsigned long long __val_gu8"
version of the 64-bit get_user()?

Because we should compare against the straightforward code, not the
one that could have messed things up already..

              Linus
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