--- linux-2.4.21-43.EL/fs/nfsd/export.c	2006-05-14 17:16:21.000000000 -0400
+++ linux/fs/nfsd/export.c	2006-05-29 02:13:29.000000000 -0400
@@ -388,6 +388,10 @@ exp_unexport(struct nfsctl_export *nxp)
 			exp_do_unexport(exp);
 			err = 0;
 		}
+		if (nxp->ex_flags & NFSEXP_FOLOCK) {
+			dprintk("exp_unexport: nfsd_lockd_unexport called\n");
+			nfsd_lockd_unexport(clp);
+		}
 	}
 
 	exp_unlock();
--- linux-2.4.21-43.EL/include/linux/nfsd/export.h	2006-05-14 17:23:57.000000000 -0400
+++ linux/include/linux/nfsd/export.h	2006-05-29 02:12:07.000000000 -0400
@@ -42,7 +42,7 @@
 #define NFSEXP_FSID			0x2000
 #define NFSEXP_NOACL			0x8000	/* turn off acl support */
 #define NFSEXP_ALLFLAGS		0xFFFF
-
+#define NFSEXP_FOLOCK			0x00010000	/* NLM lock failover */
 
 #ifdef __KERNEL__