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authorThomas Bogendoerfer <tsbogend@alpha.franken.de>2008-01-09 02:33:11 +0300
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-01-09 03:10:36 +0300
commit467bc461d2845f6a04b124bca1ae6ecc554e1ee5 (patch)
tree060bed1cbd2440486d2abaafd8f0f2b8e6b9f76b /mm
parent22a860a9e22fa077300e1e72170afb82bf695617 (diff)
downloadlinux-467bc461d2845f6a04b124bca1ae6ecc554e1ee5.tar.xz
Fix crash with FLAT_MEMORY and ARCH_PFN_OFFSET != 0
When using FLAT_MEMORY and ARCH_PFN_OFFSET is not 0, the kernel crashes in memmap_init_zone(). This bug got introduced by commit c713216deebd95d2b0ab38fef8bb2361c0180c2d Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Acked-by: Mel Gorman <mel@csn.ul.ie> Cc: Bob Picco <bob.picco@hp.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Andi Kleen <ak@muc.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Keith Mannthey" <kmannth@gmail.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/page_alloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d73bfad1c32f..e1028fae3ebb 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3438,7 +3438,7 @@ static void __init_refok alloc_node_mem_map(struct pglist_data *pgdat)
mem_map = NODE_DATA(0)->node_mem_map;
#ifdef CONFIG_ARCH_POPULATES_NODE_MAP
if (page_to_pfn(mem_map) != pgdat->node_start_pfn)
- mem_map -= pgdat->node_start_pfn;
+ mem_map -= (pgdat->node_start_pfn - ARCH_PFN_OFFSET);
#endif /* CONFIG_ARCH_POPULATES_NODE_MAP */
}
#endif