Re: [PATCH v7 1/3] revocable: Revocable resource management

[Jason Gunthorpe]

On Fri, Jan 16, 2026 at 07:19:50PM +0100, Bartosz Golaszewski wrote:
> On Fri, Jan 16, 2026 at 5:41 PM Danilo Krummrich <dakr@xxxxxxxxxx> wrote:
> >
> > On Fri Jan 16, 2026 at 5:04 PM CET, Laurent Pinchart wrote:
> > > Based on the discussions we had at LPC, the revocable resource management API
> > > is not the right solution to handle races between device removal and userspace
> > > access.
> >
> > Please see: https://lore.kernel.org/all/DFQ5D44A0348.PZJIGPL972N@xxxxxxxxxx/
> >
> > > It is however a possibly useful tool for races between producers and consumers
> > > *inside the kernel*.
> >
> > Do you have an example for such a case?
> 
> Isn't the GPIO use-case - which the series on top of it addresses - one?
> 
> With fw_devlink=off it's quite easy to trigger all kinds of crashes
> with in-kernel users.

Does this series solve that? It looked to me like it just replaces the
existing SRCU with a wrapper?

Jason