From 781ccbba7a89f2bbcab7bde2ee85eab877ee7d01 Mon Sep 17 00:00:00 2001
From: Jianqun Xu <jay.xu@rock-chips.com>
Date: Sun, 25 Apr 2021 09:50:09 +0800
Subject: [PATCH] staging: ion: uapi: add ION_FLAG_DMA32 flag

Add a new flag for system heap to allocat pages in normal zone.

Change-Id: I851b7fa412c181a6c3222aeadffddc84aba74c1e
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
---
 drivers/staging/android/uapi/ion.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/staging/android/uapi/ion.h b/drivers/staging/android/uapi/ion.h
index 5d7009884c13..50d312865730 100644
--- a/drivers/staging/android/uapi/ion.h
+++ b/drivers/staging/android/uapi/ion.h
@@ -48,6 +48,12 @@ enum ion_heap_type {
  */
 #define ION_FLAG_CACHED 1
 
+/*
+ * mappings of this buffer should be limit to 32bits, ion will add GFP_DMA32
+ * when the buffer allocates pages from system
+ */
+#define ION_FLAG_DMA32 4
+
 /**
  * DOC: Ion Userspace API
  *