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19 lines
485 B
19 lines
485 B
// SPDX-License-Identifier: GPL-2.0 |
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. |
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#include <linux/export.h> |
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#include <linux/mm.h> |
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#include <linux/io.h> |
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pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, |
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unsigned long size, pgprot_t vma_prot) |
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{ |
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if (!pfn_valid(pfn)) { |
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return pgprot_noncached(vma_prot); |
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} else if (file->f_flags & O_SYNC) { |
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return pgprot_writecombine(vma_prot); |
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} |
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return vma_prot; |
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} |
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EXPORT_SYMBOL(phys_mem_access_prot);
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