diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 7b2f645..f3d4dd5 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -341,13 +341,6 @@
 
 static int instructions_to_print = 16;
 
-#ifdef CONFIG_PPC64
-#define BAD_PC(pc)	((REGION_ID(pc) != KERNEL_REGION_ID) && \
-		         (REGION_ID(pc) != VMALLOC_REGION_ID))
-#else
-#define BAD_PC(pc)	((pc) < KERNELBASE)
-#endif
-
 static void show_instructions(struct pt_regs *regs)
 {
 	int i;
@@ -366,7 +359,8 @@
 		 * bad address because the pc *should* only be a
 		 * kernel address.
 		 */
-		if (BAD_PC(pc) || __get_user(instr, (unsigned int __user *)pc)) {
+		if (!__kernel_text_address(pc) ||
+		     __get_user(instr, (unsigned int __user *)pc)) {
 			printk("XXXXXXXX ");
 		} else {
 			if (regs->nip == pc)