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.
Change-Id: Id16ad870355a8099be26084b51feb3d622d15ced
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
Git-commit: 4e9ef397ec3cfb04b64f165d40dcf1b501415718
Git-repo: https://android.googlesource.com/kernel/common
[lauraa@codeaurora.org: Fixup context differences due to
addition of CMA heap and delayed unsecure]
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
diff --git a/drivers/gpu/ion/ion_system_heap.c b/drivers/gpu/ion/ion_system_heap.c
index 150036f..163c1dc 100644
--- a/drivers/gpu/ion/ion_system_heap.c
+++ b/drivers/gpu/ion/ion_system_heap.c
@@ -286,6 +286,7 @@
return ERR_PTR(-ENOMEM);
heap->heap.ops = &system_heap_ops;
heap->heap.type = ION_HEAP_TYPE_SYSTEM;
+ heap->heap.flags = ION_HEAP_FLAG_DEFER_FREE;
heap->pools = kzalloc(sizeof(struct ion_page_pool *) * num_orders,
GFP_KERNEL);
if (!heap->pools)