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Message-Id: <20201022050638.29641-5-sherry.sun@nxp.com>
Date: Thu, 22 Oct 2020 13:06:38 +0800
From: Sherry Sun <sherry.sun@....com>
To: hch@...radead.org, sudeep.dutt@...el.com, ashutosh.dixit@...el.com,
arnd@...db.de, gregkh@...uxfoundation.org, kishon@...com,
lorenzo.pieralisi@....com
Cc: linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
linux-imx@....com
Subject: [PATCH V3 4/4] misc: vop: mapping kernel memory to user space as noncached
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.zhang@....com>
Signed-off-by: Sherry Sun <sherry.sun@....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
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