Index: sys/sys/systm.h
===================================================================
--- sys/sys/systm.h
+++ sys/sys/systm.h
@@ -49,7 +49,7 @@
 
 __NULLABILITY_PRAGMA_PUSH
 
-#ifdef _KERNEL
+#if defined(_KERNEL) || defined (_KERNEL_UT)
 extern int cold;		/* nonzero if we are doing a cold boot */
 extern int suspend_blocked;	/* block suspend due to pending shutdown */
 extern int rebooting;		/* kern_reboot() has been called. */
@@ -173,7 +173,7 @@
 #define	__read_frequently	__section(".data.read_frequently")
 #define	__exclusive_cache_line	__aligned(CACHE_LINE_SIZE) \
 				    __section(".data.exclusive_cache_line")
-#ifdef _KERNEL
+#if defined(_KERNEL) || defined(_KERNEL_UT)
 #include <sys/param.h>		/* MAXCPU */
 #include <sys/pcpu.h>		/* curthread */
 #include <sys/kpilite.h>
@@ -665,7 +665,7 @@
 #define	__diagused	__unused
 #endif
 
-#endif /* _KERNEL */
+#endif /* _KERNEL || _KERNEL_UT */
 
 __NULLABILITY_PRAGMA_POP
 #endif /* !_SYS_SYSTM_H_ */