diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index bfe901353142f9d835eafa01cbf37b58868d0e10..115b25f50bf83786965380f041d301bad44218e0 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -279,14 +279,13 @@ int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address,
 #endif /* CONFIG_8xx */
 
 	if (is_exec) {
-#ifdef CONFIG_PPC64
+#if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
 		/* protection fault */
 		if (error_code & DSISR_PROTFAULT)
 			goto bad_area;
 		if (!(vma->vm_flags & VM_EXEC))
 			goto bad_area;
-#endif
-#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
+#else
 		pte_t *ptep;
 		pmd_t *pmdp;
 
diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
index 956571526a57bcc4169dafc3d7c74ff4b0a7dbaa..7ccb9236e8b485580c5be98f69ed5858e4cda3a5 100644
--- a/arch/powerpc/platforms/powermac/setup.c
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -454,6 +454,9 @@ static int initializing = 1;
 
 static int pmac_late_init(void)
 {
+	if (!machine_is(powermac))
+		return -ENODEV;
+
 	initializing = 0;
 	/* this is udbg (which is __init) and we can later use it during
 	 * cpu hotplug (in smp_core99_kick_cpu) */