diff --git a/sys/compat/linuxkpi/common/include/linux/ioport.h b/sys/compat/linuxkpi/common/include/linux/ioport.h
new file mode 100644
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/ioport.h
@@ -0,0 +1,31 @@
+/* Public domain. */
+
+#ifndef _LINUXKPI_LINUX_IOPORT_H
+#define _LINUXKPI_LINUX_IOPORT_H
+
+#include <linux/types.h>
+
+struct resource {
+	u_long	start;
+	u_long	end;
+};
+
+static inline resource_size_t
+resource_size(const struct resource *r)
+{
+	return (r->end - r->start + 1);
+}
+
+static inline bool
+resource_contains(struct resource *a, struct resource *b)
+{
+	return (a->start <= b->start && a->end >= b->end);
+}
+
+#define DEFINE_RES_MEM(_start, _size)		\
+	{					\
+		.start = (_start),		\
+		.end = (_start) + (_size) - 1,	\
+	}
+
+#endif
diff --git a/sys/compat/linuxkpi/dummy/include/linux/ioport.h b/sys/compat/linuxkpi/dummy/include/linux/ioport.h
deleted file mode 100644