From: H. Peter Anvin <hpa@linux.intel.com>
Date: Wed, 30 Apr 2014 21:03:25 +0000 (-0700)
Subject: x86-32, espfix: Remove filter for espfix32 due to race
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~56^2~14^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=246f2d2ee1d715e1077fc47d61c394569c8ee692;p=pandora-kernel.git

x86-32, espfix: Remove filter for espfix32 due to race

It is not safe to use LAR to filter when to go down the espfix path,
because the LDT is per-process (rather than per-thread) and another
thread might change the descriptors behind our back.  Fortunately it
is always *safe* (if a bit slow) to go down the espfix path, and a
32-bit LDT stack segment is extremely rare.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/1398816946-3351-1-git-send-email-hpa@linux.intel.com
Cc: <stable@vger.kernel.org> # consider after upstream merge
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