-/*
- * As kernfs_seq_stop() is also called after kernfs_seq_start() or
- * kernfs_seq_next() failure, it needs to distinguish whether it's stopping
- * a seq_file iteration which is fully initialized with an active reference
- * or an aborted kernfs_seq_start() due to get_active failure. The
- * position pointer is the only context for each seq_file iteration and
- * thus the stop condition should be encoded in it. As the return value is
- * directly visible to userland, ERR_PTR(-ENODEV) is the only acceptable
- * choice to indicate get_active failure.
- *
- * Unfortunately, this is complicated due to the optional custom seq_file
- * operations which may return ERR_PTR(-ENODEV) too. kernfs_seq_stop()
- * can't distinguish whether ERR_PTR(-ENODEV) is from get_active failure or
- * custom seq_file operations and thus can't decide whether put_active
- * should be performed or not only on ERR_PTR(-ENODEV).
- *
- * This is worked around by factoring out the custom seq_stop() and
- * put_active part into kernfs_seq_stop_active(), skipping it from
- * kernfs_seq_stop() if ERR_PTR(-ENODEV) while invoking it directly after
- * custom seq_file operations fail with ERR_PTR(-ENODEV) - this ensures
- * that kernfs_seq_stop_active() is skipped only after get_active failure.
- */
-static void kernfs_seq_stop_active(struct seq_file *sf, void *v)
-{
- struct kernfs_open_file *of = sf->private;
- const struct kernfs_ops *ops = kernfs_ops(of->kn);
-
- if (ops->seq_stop)
- ops->seq_stop(sf, v);
- kernfs_put_active(of->kn);
-}
-