From: H. Peter Anvin <hpa@linux.intel.com>
Date: Thu, 19 Dec 2013 19:58:16 +0000 (-0800)
Subject: x86, idle: Use static_cpu_has() for CLFLUSH workaround, add barriers
X-Git-Tag: v3.14-rc1~170^2~14^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7e98b71920464b8d15fa95c74366416cd3c88861;p=pandora-kernel.git

x86, idle: Use static_cpu_has() for CLFLUSH workaround, add barriers

Use static_cpu_has() to conditionalize the CLFLUSH workaround, and add
memory barriers around it since the documentation is explicit that
CLFLUSH is only ordered with respect to MFENCE.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Len Brown <len.brown@intel.com>
Link: http://lkml.kernel.org/r/CA%2B55aFzGxcML7j8CEvQPYzh0W81uVoAAVmGctMOUZ7CZ1yYd2A@mail.gmail.com
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