--- kernel/machdep/ppc/pcb.c	2018/04/24 18:26:09	1.1
+++ kernel/machdep/ppc/pcb.c	2018/04/24 18:33:01	1.1.1.2
@@ -42,7 +42,7 @@
 #import <kern/parallel.h>
 #include <machdep/ppc/proc_reg.h>
 #include <ppc/trap.h>
-#ifdef	KDEBUG
+#if	KDEBUG
 #include <kern/kdebug.h>
 #include <mach_counters.h>
 #include <kern/counters.h>
@@ -142,7 +142,7 @@ void stack_attach(thread, stack, continu
 	struct ppc_kernel_state *kss;
         struct pcb      *pcb = thread->pcb;
 
-#ifdef KDEBUG
+#if KDEBUG
 	if (continuation) {
 		KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED,MACH_STACK_ATTACH),
 			thread, thread->priority,
@@ -192,10 +192,12 @@ stack_handoff(
 {
     vm_offset_t		stack = stack_detach(old);
 
+#if KDEBUG
    KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED,MACH_STACK_HANDOFF),
 	old, new, 
 	old->priority, old->sched_pri, 
 	new->sched_pri);
+#endif
 
     stack_attach(new, stack, 0);
 
@@ -238,10 +240,12 @@ call_continuation(
 	int tkss;
 
 
+#if KDEBUG
 	KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED,MACH_CALL_CONT),
 			current_thread(), current_thread()->priority, 
 			current_thread()->sched_pri, continuation, 
 			0);
+#endif
 
 	kss = STACK_IKS(current_thread()->kernel_stack);
 
@@ -264,7 +268,7 @@ switch_context(
 {
     thread_t ret_thread;
     extern thread_t Switch_context();
-#ifdef KDEBUG
+#if KDEBUG
     struct linkage_area *frame_ptr;
     uint i;
     uint lr[4];
@@ -298,7 +302,7 @@ switch_context(
 	//disable_fpu();
 #endif 
 
-#ifdef KDEBUG
+#if KDEBUG
 	KERNEL_DEBUG(MACHDBG_CODE(DBG_MACH_SCHED,MACH_SCHED) | DBG_FUNC_END,
 			old, new, 
 			old->priority, old->sched_pri,