1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/sched/smp.h b/kernel/sched/smp.h
index 21ac44428bb0..7f151d96dba9 100644
--- a/kernel/sched/smp.h
+++ b/kernel/sched/smp.h
@@ -1,8 +1,13 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _KERNEL_SCHED_SMP_H
+#define _KERNEL_SCHED_SMP_H
+
 /*
  * Scheduler internal SMP callback types and methods between the scheduler
  * and other internal parts of the core kernel:
  */
+#include <linux/types.h>
 
 extern void sched_ttwu_pending(void *arg);
 
@@ -13,3 +18,5 @@ extern void flush_smp_call_function_queue(void);
 #else
 static inline void flush_smp_call_function_queue(void) { }
 #endif
+
+#endif /* _KERNEL_SCHED_SMP_H */