[PATCH V3 4/4] misc: vop: mapping kernel memory to user space as noncached

[Sherry Sun]

Mapping kernel space memory to user space as noncached, since user space
need check the updates of avail_idx and device page flags timely.

Signed-off-by: Joakim Zhang <qiangqing.zh...@nxp.com>
Signed-off-by: Sherry Sun <sherry....@nxp.com>
---
 drivers/misc/mic/vop/vop_vringh.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/mic/vop/vop_vringh.c 
b/drivers/misc/mic/vop/vop_vringh.c
index b5612183dcb8..b75c2b713a3b 100644
--- a/drivers/misc/mic/vop/vop_vringh.c
+++ b/drivers/misc/mic/vop/vop_vringh.c
@@ -1058,7 +1058,7 @@ static int vop_mmap(struct file *f, struct vm_area_struct 
*vma)
                }
                err = remap_pfn_range(vma, vma->vm_start + offset,
                                      pa >> PAGE_SHIFT, size,
-                                     vma->vm_page_prot);
+                                     pgprot_noncached(vma->vm_page_prot));
                if (err)
                        goto ret;
                size_rem -= size;
-- 
2.17.1