linux-kernel - Re: [PATCH] mm: D-cache aliasing issue in cow_user

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Message-ID: <f383264b0612052304p52444392xf7ce9e22afed01ff@mail.gmail.com>
Date:	Tue, 5 Dec 2006 23:04:32 -0800
From:	"Matt Reimer" <mattjreimer@...il.com>
To:	"David Miller" <davem@...emloft.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: D-cache aliasing issue in cow_user_page

On 12/5/06, David Miller <davem@...emloft.net> wrote:
> From: "Matt Reimer" <mattjreimer@...il.com>
> Date: Tue, 5 Dec 2006 16:57:12 -0800
>
> > Right, but isn't he declaring that each architecture needs to take
> > care of this? So, say, on ARM we'd need to make kunmap() not a NOP and
> > call flush_dcache_page() ?
>
> No.  He is only solving a problem that occurs on HIGHMEM
> configurations on systems which can have D-cache aliasing
> issues.

Ok. Thanks for the clarification.

Matt
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