Index: sys/compat/linuxkpi/common/include/linux/device.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/device.h
+++ sys/compat/linuxkpi/common/include/linux/device.h
@@ -42,6 +42,9 @@
 #include <linux/workqueue.h>
 #include <linux/kdev_t.h>
 #include <linux/backlight.h>
+#include <linux/pm.h>
+#include <linux/idr.h>
+#include <linux/ratelimit.h>	/* via linux/dev_printk.h */
 #include <asm/atomic.h>
 
 #include <sys/bus.h>
Index: sys/compat/linuxkpi/common/include/linux/fs.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/fs.h
+++ sys/compat/linuxkpi/common/include/linux/fs.h
@@ -43,6 +43,8 @@
 #include <linux/semaphore.h>
 #include <linux/spinlock.h>
 #include <linux/dcache.h>
+#include <linux/capability.h>
+#include <linux/wait_bit.h>
 
 struct module;
 struct kiocb;
Index: sys/compat/linuxkpi/common/include/linux/slab.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/slab.h
+++ sys/compat/linuxkpi/common/include/linux/slab.h
@@ -39,6 +39,7 @@
 #include <linux/types.h>
 #include <linux/gfp.h>
 #include <linux/llist.h>
+#include <linux/overflow.h>
 
 MALLOC_DECLARE(M_KMALLOC);
 
Index: sys/compat/linuxkpi/common/include/linux/spinlock.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/spinlock.h
+++ sys/compat/linuxkpi/common/include/linux/spinlock.h
@@ -41,6 +41,7 @@
 #include <linux/compiler.h>
 #include <linux/rwlock.h>
 #include <linux/bottom_half.h>
+#include <linux/lockdep.h>
 
 typedef struct {
 	struct mtx m;
Index: sys/compat/linuxkpi/common/include/stdarg.h
===================================================================
--- /dev/null
+++ sys/compat/linuxkpi/common/include/stdarg.h
@@ -0,0 +1,28 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <machine/stdarg.h>