From: Chris Metcalf <cmetcalf@tilera.com>
Date: Fri, 1 Feb 2013 17:37:48 +0000 (-0500)
Subject: tile: support atomic64_dec_if_positive()
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~79^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=adf6d9b30f089c52e674e84ca2960581e504e5e3;p=pandora-kernel.git

tile: support atomic64_dec_if_positive()

Use the normal cmpxchg() idiom to implement this functionality.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
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