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diff -urN linux-2.6.19.2.orig/mm/page_alloc.c linux-2.6.19.2/mm/page_alloc.c
--- linux-2.6.19.2.orig/mm/page_alloc.c 2007-05-20 03:26:41.000000000 +0200
+++ linux-2.6.19.2/mm/page_alloc.c 2007-05-20 03:28:22.000000000 +0200
@@ -1200,7 +1200,7 @@
unsigned int nr_free_pages(void)
{
unsigned int sum = 0;
- struct zone *zone;
+ volatile struct zone *zone;
for_each_zone(zone)
sum += zone->free_pages;
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