diff --git a/sys/compat/linuxkpi/common/include/linux/io.h b/sys/compat/linuxkpi/common/include/linux/io.h
--- a/sys/compat/linuxkpi/common/include/linux/io.h
+++ b/sys/compat/linuxkpi/common/include/linux/io.h
@@ -528,6 +528,12 @@
 	iounmap(addr);
 }
 
+static inline void *
+IOMEM_ERR_PTR(long error)
+{
+	return (void *) error;
+}
+
 #define	__MTRR_ID_BASE	1
 int lkpi_arch_phys_wc_add(unsigned long, unsigned long);
 void lkpi_arch_phys_wc_del(int);