1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #include <asm/shmparam.h>
4
5 extern void flush_dcache_page(struct page *page);
6
7 static inline unsigned long pages_do_alias(unsigned long addr1,
8 unsigned long addr2)
9 {
10 return (addr1 ^ addr2) & (SHMLBA-1);
11 }
12
13 static inline void clear_user_page(void *addr, unsigned long vaddr,
14 struct page *page)
15 {
16 clear_page(addr);
17 if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK))
18 flush_dcache_page(page);
19 }
20
21 static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
22 struct page *page)
23 {
24 copy_page(to, from);
25 if (pages_do_alias((unsigned long) to, vaddr & PAGE_MASK))
26 flush_dcache_page(page);
27 }
28
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