From: Stas Sergeev <stsp@aknet.ru>
Date: Mon, 23 Feb 2009 16:13:07 +0000 (+0300)
Subject: x86: minor cleanup in the espfix code
X-Git-Tag: v2.6.30-rc1~211^2~43^4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bda3a89745d7bb88d3e735046c0cdc3d0eb2ac24;p=pandora-kernel.git

x86: minor cleanup in the espfix code

Impact: Cleanup

Checkin be44d2aabce2d62f72d5751d1871b6212bf7a1c7 eliminates the use of
a 16-bit stack for espfix.  However, at least one instruction remained
that only operated on the low 16 bits of %esp.

This is not a bug per se because the kernel stack is always an aligned
4K or 8K block.  Therefore it cannot cross 64K boundaries; this code,
in fact, relies strictly on that fact.

However, it's a lot cleaner (and, for that matter, smaller) to operate
on the entire 32-bit register.

Signed-off-by: Stas Sergeev <stsp@aknet.ru>
CC: Zachary Amsden <zach@vmware.com>
CC: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---

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