diff -urN ref/arch/alpha/kernel/traps.c show_stack/arch/alpha/kernel/traps.c
--- ref/arch/alpha/kernel/traps.c	Sat Apr 28 18:37:44 2001
+++ show_stack/arch/alpha/kernel/traps.c	Sun Apr 29 16:50:45 2001
@@ -301,6 +301,32 @@
 	printk("\n");
 }
 
+int kstack_depth_to_print = 24;
+
+void show_stack(unsigned long *sp)
+{
+	unsigned long *stack;
+	int i;
+
+	/*
+	 * debugging aid: "show_stack(NULL);" prints the
+	 * back trace for this cpu.
+	 */
+	if(sp==NULL)
+		sp=(unsigned long*)&sp;
+
+	stack = sp;
+	for(i=0; i < kstack_depth_to_print; i++) {
+		if (((long) stack & (THREAD_SIZE-1)) == 0)
+			break;
+		if (i && ((i % 4) == 0))
+			printk("\n       ");
+		printk("%016lx ", *stack++);
+	}
+	printk("\n");
+	dik_show_trace(sp);
+}
+
 void
 die_if_kernel(char * str, struct pt_regs *regs, long err, unsigned long *r9_15)
 {