staging: ion: use compound pages on high order pages for system heap
Using compound pages relieves burden on tracking the meta information
which are currently stored in page_info.
Signed-off-by: Heesub Shin <heesub.shin@samsung.com>
Reviewed-by: Mitchel Humpherys <mitchelh@codeaurora.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/android/ion/ion_page_pool.c b/drivers/staging/android/ion/ion_page_pool.c
index 111777c..c1cea42 100644
--- a/drivers/staging/android/ion/ion_page_pool.c
+++ b/drivers/staging/android/ion/ion_page_pool.c
@@ -95,6 +95,8 @@
{
int ret;
+ BUG_ON(pool->order != compound_order(page));
+
ret = ion_page_pool_add(pool, page);
if (ret)
ion_page_pool_free_pages(pool, page);
@@ -150,7 +152,7 @@
pool->low_count = 0;
INIT_LIST_HEAD(&pool->low_items);
INIT_LIST_HEAD(&pool->high_items);
- pool->gfp_mask = gfp_mask;
+ pool->gfp_mask = gfp_mask | __GFP_COMP;
pool->order = order;
mutex_init(&pool->mutex);
plist_node_init(&pool->list, order);
diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index ae3c9ed..cb7ae08 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -73,7 +73,7 @@
if (order > 4)
gfp_flags = high_order_gfp_flags;
- page = alloc_pages(gfp_flags, order);
+ page = alloc_pages(gfp_flags | __GFP_COMP, order);
if (!page)
return NULL;
ion_pages_sync_for_device(NULL, page, PAGE_SIZE << order,