Re: [PATCH 2/2] drivers/misc: Add Aspeed P2A control driver

[Andrew Jeffery]

On Wed, 27 Feb 2019, at 08:26, Patrick Venture wrote:
> On Tue, Feb 26, 2019 at 1:42 PM Patrick Venture <venture@xxxxxxxxxx> wrote:
> >
> > On Sun, Feb 24, 2019 at 5:26 PM Andrew Jeffery <andrew@xxxxxxxx> wrote:
> > >
> >
> > >
> > > > +
> > > > +     /* Access to these needs to be locked, held via probe, mapping ioctl,
> > > > +      * and release, remove.
> > > > +      */
> > > > +     struct mutex tracking;
> > > > +     u32 readers;
> > > > +     u32 readerwriters[P2A_REGION_COUNT];
> > >
> > > Might be better to use refcount_t here instead of u32?
> >
> > Ack
> 
> refcount requires atomic, is that something we have with the ast2400, 2500?

Ah, we do on the 2500 (armv6) but not the 2400 (armv5)