tree bbad2c5982c3b76462cbee9e15458072bc80055d
parent d6ea88865d3e5b0c62040531310c1f2c6a994f46
author Thomas Hellstrom <thellstrom@vmware.com> 1289917267 +0100
committer Dave Airlie <airlied@redhat.com> 1290396313 +1000

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>