From 80e32bed614b424c83ab62cd5c59275f044ab02a Mon Sep 17 00:00:00 2001
From: Jianqun Xu <jay.xu@rock-chips.com>
Date: Wed, 3 Mar 2021 17:38:26 +0800
Subject: [PATCH] Revert "staging: android: ion: do cache flush for system heap
 pages"

This reverts commit bec15067c2a4c625014737d24b9b7766745bcaf3.

Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Signed-off-by: Tao Huang <huangtao@rock-chips.com>
Change-Id: Iae860c1009c443886ef5568b43e0af708ec88f59
---
 drivers/staging/android/ion/ion_system_heap.c | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c
index 9fdf4f742186..6f73363c2282 100644
--- a/drivers/staging/android/ion/ion_system_heap.c
+++ b/drivers/staging/android/ion/ion_system_heap.c
@@ -5,7 +5,6 @@
  * Copyright (C) 2011 Google, Inc.
  */
 
-#include <asm/cacheflush.h>
 #include <asm/page.h>
 #include <linux/dma-mapping.h>
 #include <linux/err.h>
@@ -190,17 +189,6 @@ static int ion_system_heap_allocate(struct ion_heap *heap,
 	}
 
 	buffer->sg_table = table;
-
-	if (!(buffer->flags & ION_FLAG_CACHED)) {
-		for_each_sg(table->sgl, sg, table->orig_nents, i) {
-			void *start;
-
-			page = sg_page(sg);
-			start = page_address(page);
-			dmac_flush_range(start, start + sg->length);
-		}
-	}
-
 	return 0;
 
 free_table: