-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/swap.h>
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
pfn = max_mapnr;
while (pfn-- > 0) {
+ if (!pfn_valid(pfn))
+ continue;
page = pfn_to_page(pfn);
total++;
if (PageHighMem(page))