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Date: Mon, 03 Mar 2003 15:52:42 -0600
From: Dave McCracken <dmccr@us.ibm.com>
To: Andrew Morton <akpm@digeo.com>
cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 2.5.63] Teach page_mapped about the anon flag
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--On Monday, March 03, 2003 13:35:39 -0800 Andrew Morton <akpm@digeo.com>
wrote:

> We do need a patch I think.  page_mapped() is still assuming that an
> all-bits-zero atomic_t corresponds to a zero-value atomic_t.
> 
> This does appear to be true for all supported architectures, but it's a
> bit grubby.

If that's ever not true then we need extra code to initialize/rezero that
field, since we assume it's zero on alloc, and the pte_chain code also
assumes it's zero for a new page.

Dave

======================================================================
Dave McCracken          IBM Linux Base Kernel Team      1-512-838-3059
dmccr@us.ibm.com                                        T/L   678-3059

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