x86: Don't call dump_stack() from arch_trigger_all_cpu_backtrace_handler()

show_regs() already prints two(!) stack traces, no need for a third one.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <4D5D512902000078000326EE@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/apic/hw_nmi.c

@@ -83,7 +83,6 @@ arch_trigger_all_cpu_backtrace_handler(struct notifier_block *self,
 		arch_spin_lock(&lock);
 		printk(KERN_WARNING "NMI backtrace for cpu %d\n", cpu);
 		show_regs(regs);
-		dump_stack();
 		arch_spin_unlock(&lock);
 		cpumask_clear_cpu(cpu, to_cpumask(backtrace_mask));
 		return NOTIFY_STOP;