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} 28