linux-kernel - Re: [tip:x86/asm] x86, bitops: Change bitops to be native operand size

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Message-Id: <1385853382.1974.297@driftwood>
Date:	Sat, 30 Nov 2013 17:16:22 -0600
From:	Rob Landley <rob@...dley.net>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Joe Perches <joe@...ches.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	linux-arch <linux-arch@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	james.t.kukunas@...el.com, David Miller <davem@...emloft.net>
Subject: Re: [tip:x86/asm] x86, bitops: Change bitops to be native operand
 size

On 11/12/2013 02:52:57 AM, Geert Uytterhoeven wrote:
> On Tue, Nov 12, 2013 at 5:08 AM, Joe Perches <joe@...ches.com> wrote:
> > On Tue, 2013-11-12 at 12:15 +0900, Linus Torvalds wrote:
> >> Talking about "ideal implementation" is also singularly stupid.
> >
> > I just want the various arch implementations to match
> > the docs.  I know that's stupid.
> >
> > Maybe if you really don't want to discuss things, you
> > should fix the documentation.
> 
> E.g. by adding a paragraph that the actual allowed range of indices  
> may be
> a subset of "unsigned long" on some architectures.
> Or if we know that everyone supports at least 31 resp. 63 bits, that  
> it may
> be limited to 31 resp. 63 unsigned bits, which is the positive range  
> subset of
> "long".

If this ever turns into an actual patch to this file, could you cc: me  
on it so I can marshal it upstream? (Not enough domain expertise for me  
to produce it myself...)

Thanks,

Rob--
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