diff --git a/sys/compat/linuxkpi/common/include/linux/dmi.h b/sys/compat/linuxkpi/common/include/linux/dmi.h
index 339f622f89b2..a3514c66f9cd 100644
--- a/sys/compat/linuxkpi/common/include/linux/dmi.h
+++ b/sys/compat/linuxkpi/common/include/linux/dmi.h
@@ -1,47 +1,60 @@
 /*-
  * Copyright (c) 2020 The FreeBSD Foundation
  *
  * This software was developed by Emmanuel Vadot under sponsorship
  * from the FreeBSD Foundation.
  *
  * 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, 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
  *
  * $FreeBSD$
  */
 
 #ifndef __LINUXKPI_LINUX_DMI_H__
 #define	__LINUXKPI_LINUX_DMI_H__
 
 #include <sys/types.h>
 #include <linux/mod_devicetable.h>
 
+struct dmi_header {
+	uint8_t		type;
+	uint8_t		length;
+	uint16_t	handle;
+};
+
 int linux_dmi_check_system(const struct dmi_system_id *);
 bool linux_dmi_match(enum dmi_field, const char *);
 const struct dmi_system_id *linux_dmi_first_match(const struct dmi_system_id *);
 const char *linux_dmi_get_system_info(int);
 
 #define	dmi_check_system(sysid)	linux_dmi_check_system(sysid)
 #define	dmi_match(f, str)	linux_dmi_match(f, str)
 #define	dmi_first_match(sysid)	linux_dmi_first_match(sysid)
 #define	dmi_get_system_info(sysid)	linux_dmi_get_system_info(sysid)
 
+static inline int
+dmi_walk(void (*callbackf)(const struct dmi_header *, void *), void *arg)
+{
+
+	return (-ENXIO);
+}
+
 #endif	/* __LINUXKPI_LINUX_DMI_H__ */