linux-kernel - Re: [PATCH] x86: do not overrun page table ranges in gup

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Message-Id: <200807291137.20259.nickpiggin@yahoo.com.au>
Date:	Tue, 29 Jul 2008 11:37:19 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	benh@...nel.crashing.org
Cc:	Johannes Weiner <hannes@...urebad.de>,
	Alexey Dobriyan <adobriyan@...il.com>,
	akpm@...uxfoundation.org, torvalds@...uxfoundation.org,
	npiggin@...e.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: do not overrun page table ranges in gup

On Tuesday 29 July 2008 10:39, Linus Torvalds wrote:
> On Mon, 28 Jul 2008, Linus Torvalds wrote:
> > So no, the right fix would be to align 'start' first, which means that
> > everything else (including 'end') will be page-aligned. Aligning just one
> > or the other is very very wrong.
>
> Does this work?
>
> Not pretty, but it stands _some_ chance of being correct.

No, that's not particularly ugly and I think the fix is good. Thank you
everyone involved in the thread.

Acked-by: Nick Piggin <npiggin@...e.de>
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