diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index d00b20c6596671..ca4d97688da909 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -2157,12 +2157,12 @@ static unsigned long ___get_wchan(struct task_struct *p)
 		return 0;
 
 	do {
-		sp = *(unsigned long *)sp;
+		sp = READ_ONCE_NOCHECK(*(unsigned long *)sp);
 		if (!validate_sp(sp, p, STACK_FRAME_OVERHEAD) ||
 		    task_is_running(p))
 			return 0;
 		if (count > 0) {
-			ip = ((unsigned long *)sp)[STACK_FRAME_LR_SAVE];
+			ip = READ_ONCE_NOCHECK(((unsigned long *)sp)[STACK_FRAME_LR_SAVE]);
 			if (!in_sched_functions(ip))
 				return ip;
 		}