[PATCH] initialise total_memory() earlier

Initialise total_memory earlier in boot.  Because if for some reason we run
page reclaim early in boot, we don't want total_memory to be zero when we use
it as a divisor.

And rename total_memory to vm_total_pages to avoid naming clashes with
architectures.

Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Martin Bligh <mbligh@google.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5af3318..71a0b2a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1725,9 +1725,9 @@
 		stop_machine_run(__build_all_zonelists, NULL, NR_CPUS);
 		/* cpuset refresh routine should be here */
 	}
-
-	printk("Built %i zonelists\n", num_online_nodes());
-
+	vm_total_pages = nr_free_pagecache_pages();
+	printk("Built %i zonelists.  Total pages: %ld\n",
+			num_online_nodes(), vm_total_pages);
 }
 
 /*