[PATCH] Update sysrq-B to use emergency_restart()

sysrq calls into the reboot path from an interrupt handler
we can either push the code do into process context and
call kernel_restart and get a clean reboot or we can simply
reboot the machine, and increase our chances of actually
rebooting.  emergency_reboot() seems like the closest match
to what we have previously done, and what we want.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

drivers/char/sysrq.c

@@ -115,7 +115,7 @@ static void sysrq_handle_reboot(int key, struct pt_regs *pt_regs,
 				struct tty_struct *tty) 
 {
 	local_irq_enable();
-	machine_restart(NULL);
+	emergency_restart();
 }
 
 static struct sysrq_key_op sysrq_reboot_op = {