can_share_swap_page  252 include/linux/swap.h extern int can_share_swap_page(struct page *);
can_share_swap_page 1793 mm/memory.c    			reuse = can_share_swap_page(old_page);
can_share_swap_page 2317 mm/memory.c    	if (write_access && can_share_swap_page(page)) {