On Tue, Feb 03, 2026 at 05:29:16PM +0100, Danilo Krummrich wrote:
> On Tue Feb 3, 2026 at 5:17 PM CET, Greg Kroah-Hartman wrote:
> > And I don't see what patch in this series uses this, am I missing it?
>
> impl Smem {
> pub(crate) fn access<'a>(&'a self, dev: &'a Device<Bound>) ->
> Option<&'a Mmio> {
> if *dev != *self.dev {
> return None;
> }
>
> // SAFETY: By our invariant, this was a subrange of what was
> returned by smem_aux_get, for
> // self.dev, and by our above check, that auxdev is still
> available.
> Some(unsafe { Mmio::from_raw(&self.raw) })
> }
> }
>
> It's used to ensure that the Smem provided by the auxiliary parent can only be
> accessed as long as the auxiliary parent device is bound.
But how can a parent device ever bevome "unbound"? A child can always
rely on its parent being present (some odd scsi devices are the one
exception, that mess is hell at times...)
thanks,
greg k-h
