[PATCH V31 25/25] debugfs: Disable open() when kernel is locked down

[Matthew Garrett]

On Tue, Mar 26, 2019 at 12:20 PM Andy Lutomirski <luto at kernel.org> wrote:
> Ugh.  Some of those files are very useful.  Could this perhaps still
> allow O_RDONLY if we're in INTEGRITY mode?

The previous implementation did, but Greg wanted it to go away entirely.