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(parent: d338c73) | patch
x86: add memory barriers to wrmsr
authorJeremy Fitzhardinge <jeremy@goop.org>
Wed, 25 Jun 2008 04:18:59 +0000 (00:18 -0400)
committerIngo Molnar <mingo@elte.hu>
Tue, 8 Jul 2008 11:10:24 +0000 (13:10 +0200)
commitaf2b1c609ff52b6469d8e67696db98c93c348b0e
tree794e4ebf8a9ed524cfbd01bc9e7f80fd110d3c2ctree | snapshot
parentd338c73c39a6ed0d07fe3bb07c7f12fff0dd237dcommit | diff
x86: add memory barriers to wrmsr

wrmsr is a special instruction which can have arbitrary system-wide
effects.  We don't want the compiler to reorder it with respect to
memory operations, so make it a memory barrier.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
include/asm-x86/msr.h diff | blob | history
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