[CRIS/SPARC/SPARC64]: Init mem_map after free_area_init_node.

arch/cris/mm/init.c

@@ -346,7 +346,7 @@ paging_init(void)
 	 */
 
 	free_area_init_node(0, &contig_page_data, 0, zones_size, PAGE_OFFSET >> PAGE_SHIFT, 0);
-
+	mem_map = contig_page_data.node_mem_map;
 }
 
 extern unsigned long loops_per_jiffy; /* init/main.c */

arch/sparc/mm/srmmu.c

@@ -1342,6 +1342,7 @@ void __init srmmu_paging_init(void)
 
 		free_area_init_node(0, &contig_page_data, NULL, zones_size,
 				    phys_base >> PAGE_SHIFT, zholes_size);
+		mem_map = contig_page_data.node_mem_map;
 	}
 
 /* P3: easy to fix, todo. Current code is utterly broken, though. */

arch/sparc/mm/sun4c.c

@@ -2068,6 +2068,7 @@ void __init sun4c_paging_init(void)
 
 		free_area_init_node(0, &contig_page_data, NULL, zones_size,
 				    phys_base >> PAGE_SHIFT, zholes_size);
+		mem_map = contig_page_data.node_mem_map;
 	}
 
 	cnt = 0;

arch/sparc64/mm/init.c

@@ -1554,6 +1554,7 @@ void __init paging_init(void)
 
 		free_area_init_node(0, &contig_page_data, NULL, zones_size,
 				    phys_base >> PAGE_SHIFT, zholes_size);
+		mem_map = contig_page_data.node_mem_map;
 	}
 
 	device_scan();