From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 3 Jul 2006 07:24:57 +0000 (-0700)
Subject: [PATCH] lockdep: x86_64 early init
X-Git-Tag: v2.6.18-rc1~79
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2148270cd2ebe0d05e4289b7c77b1435c45481bf;p=linux-2.6

[PATCH] lockdep: x86_64 early init

x86_64 uses spinlocks very early - earlier than start_kernel().  So call
lockdep_init() from the arch setup code.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c
index e6a71c9556..36647ce6ae 100644
--- a/arch/x86_64/kernel/head64.c
+++ b/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
 	 */