Re: [PATCH 6/8] rust: add revocable mutex

[Danilo Krummrich <dakr@redhat.com>]

On Mon, Mar 25, 2024 at 07:22:15PM +0100, Greg KH wrote:
> On Mon, Mar 25, 2024 at 06:49:10PM +0100, Danilo Krummrich wrote:
> > From: Wedson Almeida Filho <wedsonaf@gmail.com>
> > 
> > This is a mutex where access to its contents can be revoked at runtime.
> > 
> > This is different from `Revocable` in a few ways:
> >   1. The caller may sleep while holding a guard.
> >   2. Accessors are all serialised.
> >   3. Accessing is not as cheap (because it involves acquiring the mutex).
> >   4. The size of the object is larger (because it involves a mutex +
> >      flag).
> > 
> > An example of where this a good fit to be used in device state that
> > holds registrations to other subsystems.
> 
> Why don't we need this in .c files if it is so needed in drivers today?

You mean revoking access to a resource in general? 

> 
> thanks,
> 
> greg k-h
>