sparc64: Show stack backtrace from show_regs() just like other platforms.

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc/kernel/process_64.c

@@ -202,6 +202,7 @@ void show_regs(struct pt_regs *regs)
 	       regs->u_regs[15]);
 	printk("RPC: <%pS>\n", (void *) regs->u_regs[15]);
 	show_regwindow(regs);
+	show_stack(current, (unsigned long *) regs->u_regs[UREG_FP]);
 }
 
 struct global_reg_snapshot global_reg_snapshot[NR_CPUS];