diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 16b2152..aa4ea96 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -465,12 +465,20 @@ cifs_lookup(struct inode *parent_dir_ino
 			direntry->d_op = &cifs_dentry_ops;
 		d_add(direntry, newInode);
 
-		/* since paths are not looked up by component - the parent directories are presumed to be good here */
+		/* since paths are not looked up by component - the parent 
+		   directories are presumed to be good here */
 		renew_parental_timestamps(direntry);
 
 	} else if (rc == -ENOENT) {
 		rc = 0;
+		direntry->d_time = jiffies;
+		if (pTcon->nocase)
+			direntry->d_op = &cifs_ci_dentry_ops;
+		else
+			direntry->d_op = &cifs_dentry_ops;
 		d_add(direntry, NULL);
+	/*	if it was once a directory (but how can we tell?) we could do  
+			shrink_dcache_parent(direntry); */
 	} else {
 		cERROR(1,("Error 0x%x on cifs_get_inode_info in lookup of %s",
 			   rc,full_path));
@@ -489,21 +497,20 @@ cifs_d_revalidate(struct dentry *direntr
 {
 	int isValid = 1;
 
-/*	lock_kernel(); *//* surely we do not want to lock the kernel for a whole network round trip which could take seconds */
-
 	if (direntry->d_inode) {
 		if (cifs_revalidate(direntry)) {
-			/* unlock_kernel(); */
 			return 0;
 		}
 	} else {
-		cFYI(1,
-		     ("In cifs_d_revalidate with no inode but name = %s and dentry 0x%p",
-		      direntry->d_name.name, direntry));
+		cFYI(1, ("neg dentry 0x%p name = %s",
+			 direntry, direntry->d_name.name));
+		if(time_after(jiffies, direntry->d_time + HZ) || 
+			!lookupCacheEnabled) {
+			d_drop(direntry);
+			isValid = 0;
+		} 
 	}
 
-/*    unlock_kernel(); */
-
 	return isValid;
 }
 
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 05b5258..d34325c 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1039,14 +1039,20 @@ int cifs_revalidate(struct dentry *diren
 		filemap_fdatawrite(direntry->d_inode->i_mapping);
 	}
 	if (invalidate_inode) {
-		if (direntry->d_inode->i_mapping)
-			filemap_fdatawait(direntry->d_inode->i_mapping);
-		/* may eventually have to do this for open files too */
-		if (list_empty(&(cifsInode->openFileList))) {
-			/* Has changed on server - flush read ahead pages */
-			cFYI(1, ("Invalidating read ahead data on "
-				 "closed file"));
-			invalidate_remote_inode(direntry->d_inode);
+	/* shrink_dcache not necessary now that cifs dentry ops
+	are exported for negative dentries */
+/*		if(S_ISDIR(direntry->d_inode->i_mode)) 
+			shrink_dcache_parent(direntry); */
+		if (S_ISREG(direntry->d_inode->i_mode)) {
+			if (direntry->d_inode->i_mapping)
+				filemap_fdatawait(direntry->d_inode->i_mapping);
+			/* may eventually have to do this for open files too */
+			if (list_empty(&(cifsInode->openFileList))) {
+				/* changed on server - flush read ahead pages */
+				cFYI(1, ("Invalidating read ahead data on "
+					 "closed file"));
+				invalidate_remote_inode(direntry->d_inode);
+			}
 		}
 	}
 /*	up(&direntry->d_inode->i_sem); */