Re: [PATCH] mm: Fix PageHead when !CONFIG_PAGEFLAGS_EXTENDED

From: Linus Torvalds
Date: Fri Dec 28 2012 - 17:06:35 EST


On Fri, Dec 28, 2012 at 9:07 AM, <c.dall@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> From: Christoffer Dall <cdall@xxxxxxxxxxxxxxx>
>
> Unfortunately with !CONFIG_PAGEFLAGS_EXTENDED, (!PageHead) is false, and
> (PageHead) is true, for tail pages. This breaks cache cleaning on some
> ARM systems, and may cause other bugs.

So this already got committed earlier as commit ad4b3fb7ff99 ("mm: Fix
PageHead when !CONFIG_PAGEFLAGS_EXTENDED")

Linus
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