Hi Andy,

> Nope. Below is the compile-tested one:

Well, then let's add this incrementally once it has actually been
tested.

> > I don't understand the first sentence. And we still need it to clean up?
> 
> If you know the name of the folder, you may look up it, no need to keep a
> variable for that.

I need the dentry twice, subdirs are also created in there. Of course, I
could look it up twice, but why the computation? The variable seems
simpler to me, despite it being static. Or is it a debugfs rule to not
save dentries?

Happy hacking,

   Wolfram