Re: [RFC v2 09/20] PCI/CMA: Expose in sysfs whether devices are authenticated

[Greg KH]

On Thu, Feb 27, 2025 at 05:45:02PM +0100, Miguel Ojeda wrote:
> On Thu, Feb 27, 2025 at 1:01 PM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> >
> > Sorry, you are right, it does, and of course it happens (otherwise how
> > would bindings work), but for small functions like this, how is the C
> > code kept in sync with the rust side?  Where is the .h file that C
> > should include?
> 
> What you were probably remembering is that it still needs to be
> justified, i.e. we don't want to generally/freely start replacing
> "individual functions" and doing FFI both ways everywhere, i.e. the
> goal is to build safe abstractions wherever possible.

Ah, ok, that's what I was remembering.

Anyway, the "pass a void blob from C into rust" that this patch is doing
feels really odd to me, and hard to verify it is "safe" at a simple
glance.

thanks,

greg k-h