diff --git a/sys/compat/linuxkpi/common/include/linux/kref.h b/sys/compat/linuxkpi/common/include/linux/kref.h
--- a/sys/compat/linuxkpi/common/include/linux/kref.h
+++ b/sys/compat/linuxkpi/common/include/linux/kref.h
@@ -43,6 +43,7 @@
 #include <asm/atomic.h>
 
 struct kref {
+	/* XXX In Linux this is a refcount_t */
 	atomic_t refcount;
 };
 
diff --git a/sys/compat/linuxkpi/common/include/linux/refcount.h b/sys/compat/linuxkpi/common/include/linux/refcount.h
--- a/sys/compat/linuxkpi/common/include/linux/refcount.h
+++ b/sys/compat/linuxkpi/common/include/linux/refcount.h
@@ -79,4 +79,15 @@
 	return (false);
 }
 
+/*
+ * struct kref uses atomic_t and not refcount_t so
+ * we differ from Linux here.
+ */
+static inline bool
+refcount_dec_and_test(atomic_t *r)
+{
+
+	return (atomic_dec_and_test(r));
+}
+
 #endif /* __LINUXKPI_LINUX_REFCOUNT_H__ */