staging: ion: remove order argument from free_buffer_page()

Now that the pages returned from the pool are compound pages, we do not
need to pass the order information to free_buffer_page().
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>

drivers/staging/android/ion/ion_system_heap.c

@@ -78,9 +78,9 @@ static struct page *alloc_buffer_page(struct ion_system_heap *heap,
 }
 
 static void free_buffer_page(struct ion_system_heap *heap,
-			     struct ion_buffer *buffer, struct page *page,
-			     unsigned int order)
+			     struct ion_buffer *buffer, struct page *page)
 {
+	unsigned int order = compound_order(page);
 	bool cached = ion_buffer_cached(buffer);
 
 	if (!cached && !(buffer->private_flags & ION_PRIV_FLAG_SHRINKER_FREE)) {
@@ -171,7 +171,7 @@ static int ion_system_heap_allocate(struct ion_heap *heap,
 	kfree(table);
 free_pages:
 	list_for_each_entry_safe(page, tmp_page, &pages, lru)
-		free_buffer_page(sys_heap, buffer, page, compound_order(page));
+		free_buffer_page(sys_heap, buffer, page);
 	return -ENOMEM;
 }
 
@@ -191,8 +191,7 @@ static void ion_system_heap_free(struct ion_buffer *buffer)
 		ion_heap_buffer_zero(buffer);
 
 	for_each_sg(table->sgl, sg, table->nents, i)
-		free_buffer_page(sys_heap, buffer, sg_page(sg),
-				get_order(sg->length));
+		free_buffer_page(sys_heap, buffer, sg_page(sg));
 	sg_free_table(table);
 	kfree(table);
 }