Re: [cocci] patch idea: convert trivial call_rcu users to kfree_rcu

[Julia Lawall <julia.lawall@inria.fr>]

On Mon, 27 May 2024, Uladzislau Rezki wrote:

> On Mon, May 27, 2024 at 12:27:14PM -0700, Paul E. McKenney wrote:
> > On Mon, May 27, 2024 at 10:13:40AM +0200, Julia Lawall wrote:
> > >
> > >
> > > On Mon, 27 May 2024, Vlastimil Babka wrote:
> > >
> > > > Hi,
> > > >
> > > > one bit from LSF/MM discussions is that there might be call_rcu users with a
> > > > callback that only does a kmem_cache_free() to a specific cache. Since SLOB
> > > > was removed, it's always ok to use kfree() and thus also kfree_rcu() on
> > > > allocations from kmem_cache_alloc() in addition to kmalloc(). Thus, such
> > > > call_rcu() users might be simplified to kfree_rcu(). I found some cases
> > > > semi-manually, but I'd expect coccinelle could help here so if anyone wants
> > > > to take this task, feel free to.
> > >
> > > Thanks for the suggestion!  I will try to look into it.
> >
> > Thank you both!
> >
> I wanted to take an action on it but Julia was first. So, please go ahead :)

If you want to try, please go ahead.  We can compare results.

julia