diff --git a/sys/compat/linuxkpi/common/include/linux/xarray.h b/sys/compat/linuxkpi/common/include/linux/xarray.h
--- a/sys/compat/linuxkpi/common/include/linux/xarray.h
+++ b/sys/compat/linuxkpi/common/include/linux/xarray.h
@@ -97,4 +97,27 @@
 	xa_init_flags(xa, 0);
 }
 
+static inline void *
+xa_mk_value(unsigned long v)
+{
+	unsigned long r = (v << 1) | 1;
+
+	return ((void *)r);
+}
+
+static inline bool
+xa_is_value(const void *e)
+{
+	unsigned long v = (unsigned long)e;
+
+	return (v & 1);
+}
+
+static inline unsigned long
+xa_to_value(const void *e)
+{
+	unsigned long v = (unsigned long)e;
+
+	return (v >> 1);
+}
 #endif		/* _LINUX_XARRAY_H_ */