From: Tejun Heo <tj@kernel.org>
Date: Fri, 9 May 2014 19:11:53 +0000 (-0400)
Subject: percpu-refcount: implement percpu_ref_tryget()
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~84^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4fb6e25049cb;p=pandora-kernel.git

percpu-refcount: implement percpu_ref_tryget()

Implement percpu_ref_tryget() which fails if the refcnt already
reached zero.  Note that this is different from the recently renamed
percpu_ref_tryget_live() which fails if the refcnt has been killed and
is draining the remaining references.  percpu_ref_tryget() succeeds on
a killed refcnt as long as its current refcnt is above zero.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Kent Overstreet <kmo@daterainc.com>
---

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