ion: remove ion_heap_alloc_pages

Now that ion_vm_fault doesn't need a struct page with a nonzero
refcount, there is no need allocate heap memory for cached pages using
split_page.  Remove the ion_heap_alloc_pages and ion_heap_free_pages
helpers in favor of direct calls to alloc_pages and __free_pages,
and remove the special handling in the system heap.

Change-Id: I5966a798f48df2d56642e662a69c1495944f6509
Signed-off-by: Colin Cross <ccross@android.com>

1 files changed, 0 insertions, 27 deletions

diff --git a/drivers/staging/android/ion/ion_heap.c b/drivers/staging/android/ion/ion_heap.c
index 403fdc7d745..24d7e3284ae 100644
--- a/drivers/staging/android/ion/ion_heap.c
+++ b/drivers/staging/android/ion/ion_heap.c
@@ -148,33 +148,6 @@ end:
 	return ret;
 }
 
-struct page *ion_heap_alloc_pages(struct ion_buffer *buffer, gfp_t gfp_flags,
-				  unsigned int order)
-{
-	struct page *page = alloc_pages(gfp_flags, order);
-
-	if (!page)
-		return page;
-
-	if (ion_buffer_fault_user_mappings(buffer))
-		split_page(page, order);
-
-	return page;
-}
-
-void ion_heap_free_pages(struct ion_buffer *buffer, struct page *page,
-			 unsigned int order)
-{
-	int i;
-
-	if (!ion_buffer_fault_user_mappings(buffer)) {
-		__free_pages(page, order);
-		return;
-	}
-	for (i = 0; i < (1 << order); i++)
-		__free_page(page + i);
-}
-
 void ion_heap_freelist_add(struct ion_heap *heap, struct ion_buffer * buffer)
 {
 	rt_mutex_lock(&heap->lock);