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