28 lines
749 B
C
28 lines
749 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
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extern unsigned long shm_align_mask;
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extern void flush_dcache_page(struct page *page);
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static inline unsigned long pages_do_alias(unsigned long addr1,
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unsigned long addr2)
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{
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return (addr1 ^ addr2) & shm_align_mask;
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}
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static inline void clear_user_page(void *addr, unsigned long vaddr,
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struct page *page)
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{
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clear_page(addr);
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if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
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flush_dcache_page(page);
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}
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static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
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struct page *page)
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{
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copy_page(to, from);
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if (pages_do_alias((unsigned long) to, vaddr & PAGE_MASK))
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flush_dcache_page(page);
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}
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