x86: Add xadd helper macro
authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Tue, 21 Jun 2011 19:00:55 +0000 (12:00 -0700)
committerH. Peter Anvin <hpa@linux.intel.com>
Mon, 29 Aug 2011 20:42:20 +0000 (13:42 -0700)
Add a common xadd implementation.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Link: http://lkml.kernel.org/r/4E5BCC40.3030501@goop.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

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