allow ->read_iter on debugfs
From: Christoph Hellwig
Date: Mon Jul 13 2020 - 03:39:47 EST
Hi Greg,
in my filesystem set_fs removel series I convert the seq_file interface
to be iov_iter based. It turns out debugfs needs this little patch
to proxy read_iter as well. Let me know if you are ok with me queueing
this up with the rest of the series.