diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 6b2f757..6670711 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -113,6 +113,12 @@
 
 #define GLR_TRYFAILED		13
 
+#define GL_GLOCK_MAX_HOLD        (long)(HZ / 5)
+#define GL_GLOCK_DFT_HOLD        (long)(HZ / 5)
+#define GL_GLOCK_MIN_HOLD        (long)(10)
+#define GL_GLOCK_HOLD_INCR       (long)(HZ / 20)
+#define GL_GLOCK_HOLD_DECR       (long)(HZ / 40)
+
 struct lm_lockops {
 	const char *lm_proto_name;
 	int (*lm_mount) (struct gfs2_sbd *sdp, const char *fsname);