--- kernel/bsd/hfs/hfs_readwrite.c	2018/04/24 18:26:05	1.1.1.1
+++ kernel/bsd/hfs/hfs_readwrite.c	2018/04/24 18:30:54	1.1.1.2
@@ -438,7 +438,9 @@ struct vop_write_args /* {
         return (EISDIR);
     };
 
+#if MACH_NBC
 	(void)vnode_uncache(vp);			/* XXX PPD Is this the right place to call this?  It'll VOP_UNLOCK the vnode */
+#endif /* MACH_NBC */
 
 #if DIAGNOSTIC
     if (uio->uio_rw != UIO_WRITE)