Subject: mm: fix call to alloc_bootmem after bootmem has been freed

From: Christian Krafft <krafft@de.ibm.com>
In some cases it might happen, that alloc_bootmem is beeing called
after bootmem pages have been freed. This is, because the condition
SYSTEM_BOOTING is still true after bootmem has been freed.

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c
+++ linux-2.6/mm/page_alloc.c
@@ -2199,7 +2199,7 @@ int zone_wait_table_init(struct zone *zo
 	alloc_size = zone->wait_table_hash_nr_entries
 					* sizeof(wait_queue_head_t);
 
- 	if (system_state == SYSTEM_BOOTING) {
+	if (!slab_is_available()) {
 		zone->wait_table = (wait_queue_head_t *)
 			alloc_bootmem_node(pgdat, alloc_size);
 	} else {