Don't use oops_begin in 64bit mce code

It is not really useful to lock machine checks against oopses. And
machine checks normally don't nest, so they don't need their 
own locking. Just call bust_spinlock/console_verbose directly.

Signed-off-by: Andi Kleen <ak@suse.de>

---
 arch/x86/kernel/cpu/mcheck/mce_64.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux/arch/x86/kernel/cpu/mcheck/mce_64.c
===================================================================
--- linux.orig/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ linux/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -133,7 +133,8 @@ static void mce_panic(char *msg, struct 
 {
 	int i;
 
-	oops_begin();
+	console_verbose();
+	bust_spinlocks(1);
 	for (i = 0; i < MCE_LOG_LEN; i++) {
 		unsigned long tsc = mcelog.entry[i].tsc;