From: Franck Bui-Huu <fbuihuu@gmail.com>
Date: Wed, 10 Jan 2007 08:44:05 +0000 (+0100)
Subject: [MIPS] FLATMEM: introduce PHYS_OFFSET.
X-Git-Tag: v2.6.21-rc1~92^2~44^2~33
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6f284a2ce7b8bc49cb8455b1763357897a899abb;p=pandora-kernel.git

[MIPS] FLATMEM: introduce PHYS_OFFSET.

The old code was assuming that min_low_pfn was always 0. This
means that platforms having a big hole at their memory start
paid the price of wasting some memory for the allocation of
unused entries in mem_map[].

This patch prevents this waste.

It introduces PHYS_OFFSET define which is the start of the
physical memory and uses it wherever needed. Specially when
converting physical/virtual addresses into virtual/physical
ones.

Currently all platforms defines PHYS_OFFSET to 0.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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