diff --git a/[refs] b/[refs]
index 09af0177cb64..9088a38136ff 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8c64580d522542e50f2ba689316128b7fbae497b
+refs/heads/master: 2148270cd2ebe0d05e4289b7c77b1435c45481bf
diff --git a/trunk/arch/x86_64/kernel/head64.c b/trunk/arch/x86_64/kernel/head64.c
index e6a71c9556d9..36647ce6aecb 100644
--- a/trunk/arch/x86_64/kernel/head64.c
+++ b/trunk/arch/x86_64/kernel/head64.c
@@ -84,6 +84,11 @@ void __init x86_64_start_kernel(char * real_mode_data)
 	asm volatile("lidt %0" :: "m" (idt_descr));
 	clear_bss();
 
+	/*
+	 * This must be called really, really early:
+	 */
+	lockdep_init();
+
 	/*
 	 * switch to init_level4_pgt from boot_level4_pgt
 	 */