Re: [PATCH] namei: get rid of unused filename_parentat()

[Al Viro]

On Wed, Sep 01, 2021 at 10:00:40PM +0700, Dmitry Kadashev wrote:
> After the switch of kern_path_locked() to __filename_parentat() (to
> address use after free bug) nothing is using filename_parentat(). Also,
> filename_parentat() is inherently buggy: the "last" output arg
> always point to freed memory.
> 
> Drop filename_parentat() and rename __filename_parentat() to
> filename_parentat().

I'd rather fold that into previous patch.

And it might be better to fold filename_create() into its 2 callers
and rename __filename_create() as well.

Let me poke around a bit...