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Commit f4dee85e authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Ralf Baechle
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[MIPS] sparsemem: fix crash in show_mem 



With sparsemem, pfn should be checked by pfn_valid() before pfn_to_page().

Signed-off-by: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent bddc8134

arch/mips/mm/pgtable.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -15,6 +15,8 @@ void show_mem(void) 
	printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));

	printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));

	pfn = max_mapnr;

	pfn = max_mapnr;

	while (pfn-- > 0) {

	while (pfn-- > 0) {

		if (!pfn_valid(pfn))

			continue;

		page = pfn_to_page(pfn);

		page = pfn_to_page(pfn);

		total++;

		total++;

		if (PageHighMem(page))

		if (PageHighMem(page))