[PATCH] x86_64: Implemenent machine_emergency_restart

It is not safe to call set_cpus_allowed() in interrupt
context and disabling the apics is complicated code.
So unconditionally skip machine_shutdown in machine_emergency_reboot
on x86_64.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 11 insertions, 7 deletions

diff --git a/arch/x86_64/kernel/reboot.c b/arch/x86_64/kernel/reboot.c
index d4c45ff92d5c..3d1cc09406a6 100644
--- a/arch/x86_64/kernel/reboot.c
+++ b/arch/x86_64/kernel/reboot.c
@@ -109,16 +109,10 @@ void machine_shutdown(void)
 	local_irq_enable();
 }
 
-void machine_restart(char * __unused)
+void machine_emergency_restart(void)
 {
 	int i;
 
-	printk("machine restart\n");
-
-	if (!reboot_force) {
-		machine_shutdown();
-	}
-	
 	/* Tell the BIOS if we want cold or warm reboot */
 	*((unsigned short *)__va(0x472)) = reboot_mode;
        
@@ -143,6 +137,16 @@ void machine_restart(char * __unused)
 	}      
 }
 
+void machine_restart(char * __unused)
+{
+	printk("machine restart\n");
+
+	if (!reboot_force) {
+		machine_shutdown();
+	}
+	machine_emergency_restart();
+}
+
 void machine_halt(void)
 {
 }