Re: [PATCH 2/4] x86: ioremap: fix physical address check

From: Maciej W. Rozycki
Date: Mon Jun 14 2010 - 02:38:19 EST

On Mon, 14 Jun 2010, Kenji Kaneshige wrote:

> - Architectural limit of physical address in x86 32-bit mode is 40-bit
> (depnds on processor version).

According to documentation I happen to have handy this limit is actually
52 bits (and space is currently available in the data structures used for
a possible future extension up to 63 bits).

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