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[MIPS] sparsemem: fix crash in show_mem

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

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2006-07-13 23:01:50 +09:00
committed by Ralf Baechle
parent bddc8134db
commit f4dee85e2c
1 changed files with 2 additions and 0 deletions
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2
arch/mips/mm/pgtable.c
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@@ -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))