[PATCH] powerpc/pseries: boot failures on numa if no memory on node

This bug exists in the current code and prevents machines from booting
with numa enabled if there is a node that does not contain memory.
Workaround is to boot with 'numa=off'.  Looks like a simple typo.
Signed-off-by: Mike Kravetz <kravetz@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/mm/numa.c

@@ -125,7 +125,7 @@ void __init get_region(unsigned int nid, unsigned long *start_pfn,
 
 	/* We didnt find a matching region, return start/end as 0 */
 	if (*start_pfn == -1UL)
-		start_pfn = 0;
+		*start_pfn = 0;
 }
 
 static inline void map_cpu_to_node(int cpu, int node)