From fe2faea7003516dd615812f663b6a9b141b842ce Mon Sep 17 00:00:00 2001
From: Rebecca Schultz Zavin <rebecca@android.com>
Date: Fri, 13 Dec 2013 14:24:35 -0800
Subject: [PATCH] gpu: ion: Make ion_free asynchronous

Add the ability for a heap to free buffers asynchrounously.  Freed buffers
are placed on a free list and freed from a low priority background thread.
If allocations from a particular heap fail, the free list is drained.  This
patch also enable asynchronous frees from the chunk heap.

Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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