From: Kirill Korotaev <dev@openvz.org>
Date: Wed, 17 Oct 2007 16:04:33 +0000 (+0200)
Subject: x86: mark read_crX() asm code as volatile
X-Git-Tag: v2.6.24-rc1~476^2~99
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c1217a75ea102d4e69321f210fab60bc47b9a48e;p=pandora-kernel.git

x86: mark read_crX() asm code as volatile

Some gcc versions (I checked at least 4.1.1 from RHEL5 & 4.1.2 from gentoo)
can generate incorrect code with read_crX()/write_crX() functions mix up,
due to cached results of read_crX().

The small app for x8664 below compiled with -O2 demonstrates this
(i686 does the same thing):
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