From: H. Peter Anvin <hpa@zytor.com>
Date: Wed, 1 Apr 2009 18:35:00 +0000 (-0700)
Subject: x86, setup: guard against pre-ACPI 3 e820 code not updating %ecx
X-Git-Tag: v2.6.30-rc1~412^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cd670599b7b00d9263f6f11a05c0edeb9cbedaf3;p=pandora-kernel.git

x86, setup: guard against pre-ACPI 3 e820 code not updating %ecx

Impact: BIOS bug safety

For pre-ACPI 3 BIOSes, pre-initialize the end of the e820 buffer just
in case the BIOS returns an unchanged %ecx but without actually
touching the ACPI 3 extended flags field.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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