wmb

[Duncan Sands]

> > > Hi Roman, what is this wmb for?
> > > 
> > >         INIT_WORK(&instance->poll_work, (void *)cxacru_poll_status, instance);
> > > 
> > >         wmb();
> > >         usbatm_instance->driver_data = instance;
> > > 
> > 
> > I thought this way I made sure that instance is fully initialized before
> > it might be used.
> 
> do you think this argument actually justifies the wmb() here?

No - wmb makes sure that other CPUs (or processes) see that right value
in memory.  At this point no-one else is rummaging around in this data
structure are they?

D.