linux-kernel - Re: [PATCH 2.6.19-rc1 update4] drivers: add LCD support

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Message-ID: <Pine.LNX.4.64.0610301419090.32176@blonde.wat.veritas.com>
Date:	Mon, 30 Oct 2006 14:24:57 +0000 (GMT)
From:	Hugh Dickins <hugh@...itas.com>
To:	Franck Bui-Huu <vagabon.xyz@...il.com>
cc:	Andrew Morton <akpm@...l.org>,
	Miguel Ojeda Sandonis <maxextreme@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.19-rc1 update4] drivers: add LCD support

On Mon, 30 Oct 2006, Franck Bui-Huu wrote:
> 
> Any idea why LDD3 states:
> 
> 	An interesting limitation of remap_pfn_range is that it gives
> 	access only to reserved pages and physical addresses above the
> 	top of physical memory.

It was true until 2.6.15, when VM_PFNMAP removed that restriction to
PageReserved (or struct-page-less) pages.

Hugh
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