[XFS] allow a null behaviour pointer in linvfs_clear_inode

SGI-PV: 940531
SGI-Modid: xfs-linux:xfs-kern:197782a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

fs/xfs/linux-2.6/xfs_super.c

@@ -387,14 +387,17 @@ linvfs_clear_inode(
 
 	vn_trace_entry(vp, "clear_inode", (inst_t *)__return_address);
 
-	ASSERT(vp->v_fbhv != NULL);
-
 	XFS_STATS_INC(vn_rele);
 	XFS_STATS_INC(vn_remove);
 	XFS_STATS_INC(vn_reclaim);
 	XFS_STATS_DEC(vn_active);
 
-	VOP_INACTIVE(vp, NULL, cache);
+	/*
+	 * This can happen because xfs_iget_core calls xfs_idestroy if we
+	 * find an inode with di_mode == 0 but without IGET_CREATE set.
+	 */
+	if (vp->v_fbhv)
+		VOP_INACTIVE(vp, NULL, cache);
 
 	VN_LOCK(vp);
 	vp->v_flag &= ~VMODIFIED;