[PATCH] x86_64: numa_add_cpu() fix

Problem is with "c - cpu_data" arthimetic.  "c" could be "boot_cpu_data" or
"cpu_data".
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/x86_64/kernel/setup.c

@@ -917,7 +917,8 @@ void __init identify_cpu(struct cpuinfo_x86 *c)
 	mcheck_init(c);
 #endif
 #ifdef CONFIG_NUMA
-	numa_add_cpu(c - cpu_data);
+	if (c != &boot_cpu_data)
+		numa_add_cpu(c - cpu_data);
 #endif
 }