diff --git a/arch/powerpc/include/asm/stackprotector.h b/arch/powerpc/include/asm/stackprotector.h
index 283c34647856..4727f40052dd 100644
--- a/arch/powerpc/include/asm/stackprotector.h
+++ b/arch/powerpc/include/asm/stackprotector.h
@@ -19,8 +19,13 @@
  */
 static __always_inline void boot_init_stack_canary(void)
 {
-	unsigned long canary = get_random_canary();
+	unsigned long canary;
 
+#ifndef CONFIG_PREEMPT_RT
+	canary = get_random_canary();
+#else
+	canary = ((unsigned long)&canary) & CANARY_MASK;
+#endif
 	current->stack_canary = canary;
 #ifdef CONFIG_PPC64
 	get_paca()->canary = canary;