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

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Message-Id: <20061205.165948.98864221.davem@davemloft.net>
Date:	Tue, 05 Dec 2006 16:59:48 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	mattjreimer@...il.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: D-cache aliasing issue in cow_user_page

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.
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