From: Kent Overstreet <koverstreet@google.com>
Date: Mon, 3 Jun 2013 23:02:29 +0000 (-0700)
Subject: percpu-refcount: Don't use silly cmpxchg()
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~46^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c1ae6e9b4db00023b9caed72af49a93abad46452;p=pandora-kernel.git

percpu-refcount: Don't use silly cmpxchg()

The cmpxchg() was just to ensure the debug check didn't race, which was
a bit excessive. The caller is supposed to do the appropriate
synchronization, which means percpu_ref_kill() can just do a simple
store.

Signed-off-by: Kent Overstreet <koverstreet@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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