linux-kernel - Re: fs hang in 2.6.27.y | Fwd: [Bug 15658] New: [PATCH] x86 constant_test_bit() prone to misoptimization with gcc-4.4

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Date:	Sun, 26 Sep 2010 10:00:00 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Volodymyr G. Lukiianyk" <volodymyrgl@...il.com>,
	Alexander Chumachenko <ledest@...il.com>,
	Glauber de Oliveira Costa <gcosta@...hat.com>
Subject: Re: fs hang in 2.6.27.y | Fwd: [Bug 15658] New: [PATCH] x86
 constant_test_bit() prone to misoptimization with gcc-4.4

On Sun, Sep 26, 2010 at 4:53 AM, Michael Shigorin <mike@...n.org.ua> wrote:
>
> The simplicity of adding that somewhat went over my head --
> please find attached the corrected original patch against HEAD
> with Signed-off-by: for both of us.  led@ didn't change cosmetics
> -- thanks for providing it anyways.

Ok, I think this patch is probably the right thing to do at this stage
- and we should think about trying to see if we can improve code
generation later.

So: "Acked-by: Linus Torvalds <torvalds@...ux-foundation.org>"

Ingo/Thomas/Peter - I can take this either from the x86 tree, or
directly. Just let me know. Or do you have any alternate suggestions
that would be appropriate?

                           Linus
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