introduce a parallel variant of ->iterate()

New method: ->iterate_shared().  Same arguments as in ->iterate(),
called with the directory locked only shared.  Once all filesystems
switch, the old one will be gone.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index 402c5caab5ca..207ba8d627ca 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -312,7 +312,7 @@ static int get_name(const struct path *path, char *name, struct dentry *child)
                 goto out;
 
         error = -EINVAL;
-        if (!file->f_op->iterate)
+        if (!file->f_op->iterate && !file->f_op->iterate_shared)
                 goto out_close;
 
         buffer.sequence = 0;