1 // SPDX-License-Identifier: GPL-2.0 1
2 // Copyright (C) 2018 Hangzhou C-SKY Microsyst
3
4 #include <linux/export.h>
5 #include <linux/mm.h>
6 #include <linux/io.h>
7
8 pgprot_t phys_mem_access_prot(struct file *fil
9 unsigned long si
10 {
11 if (!pfn_valid(pfn)) {
12 return pgprot_noncached(vma_pr
13 } else if (file->f_flags & O_SYNC) {
14 return pgprot_writecombine(vma
15 }
16
17 return vma_prot;
18 }
19 EXPORT_SYMBOL(phys_mem_access_prot);
20
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