1/* SPDX-License-Identifier: GPL-2.0 */
 2
 3#include <asm/shmparam.h>
 4
 5extern void flush_dcache_page(struct page *page);
 6
 7static inline unsigned long pages_do_alias(unsigned long addr1,
 8					   unsigned long addr2)
 9{
10	return (addr1 ^ addr2) & (SHMLBA-1);
11}
12
13static 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
21static 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}