page_swapcount    464 include/linux/swap.h extern int page_swapcount(struct page *);
page_swapcount   1571 mm/swapfile.c  		return page_swapcount(page) != 0;
page_swapcount   1597 mm/swapfile.c  			swapcount = page_swapcount(page);
page_swapcount   1667 mm/swapfile.c  	     total_swapcount == page_swapcount(page))) {