[MIPS] Make show_code static and add __user tag

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/traps.c

@@ -187,7 +187,7 @@ void dump_stack(void)
 
 EXPORT_SYMBOL(dump_stack);
 
-void show_code(unsigned int *pc)
+static void show_code(unsigned int __user *pc)
 {
 	long i;
 
@@ -305,7 +305,7 @@ void show_registers(struct pt_regs *regs)
 	printk("Process %s (pid: %d, threadinfo=%p, task=%p)\n",
 	        current->comm, current->pid, current_thread_info(), current);
 	show_stacktrace(current, regs);
-	show_code((unsigned int *) regs->cp0_epc);
+	show_code((unsigned int __user *) regs->cp0_epc);
 	printk("\n");
 }
 
@@ -865,7 +865,7 @@ asmlinkage void do_mcheck(struct pt_regs *regs)
 		dump_tlb_all();
 	}
 
-	show_code((unsigned int *) regs->cp0_epc);
+	show_code((unsigned int __user *) regs->cp0_epc);
 
 	/*
 	 * Some chips may have other causes of machine check (e.g. SB1