Re: [PATCH] files: rcu free files_struct

[Linus Torvalds]

On Wed, Dec 9, 2020 at 3:01 PM Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> rcu_assign_pointer() itself already does the optimization for the case
> of a constant NULL pointer assignment.
>
> So there's no need to manually change things to RCU_INIT_POINTER().

Side note: what should be done instead is to delete the stale comment.
It should have been removed back when the optimization was done in
2016 - see commit 3a37f7275cda ("rcu: No ordering for
rcu_assign_pointer() of NULL")

            Linus