From: Thomas Hellstrom <thellstrom@vmware.com>
Date: Tue, 16 Nov 2010 14:21:07 +0000 (+0100)
Subject: kref: Add a kref_sub function
X-Git-Tag: v2.6.38-rc1~419^2~42^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ecf7ace9a8450303a987aa8364e53860cd50e554;p=pandora-kernel.git

kref: Add a kref_sub function

Makes it possible to optimize batched multiple unrefs.
Initial user will be drivers/gpu/ttm which accumulates unrefs to be
processed outside of atomic code.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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