From: Olof Johansson <olof@lixom.net>
Date: Mon, 29 Aug 2005 02:42:10 +0000 (-0500)
Subject: [PATCH] PPC64: Don't try to claim memory from OF at 1GB mark
X-Git-Tag: v2.6.14-rc1~1034^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7fea82ab1a74030f79a2adfac1af3d93b8638fc3;p=pandora-kernel.git

[PATCH] PPC64: Don't try to claim memory from OF at 1GB mark

Some RS64-based machines (p620, F80, others) have problems with firmware
returning 0xdeadbeef instead of failure to allocations that end at the
1GB mark.

We have two options:
1. Detect the undocumented 0xdeadbeef return value and interpret it as
a failure.
2. Avoid allocating that high.

(2) is really the cleaner solution here. 768MB is plenty of room so use
that as the max alloc_top instead of 1GB.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

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