Re: [PATCH take #5] [libata] libata driver for bf548 on chip ATAPI controller.

[Jeff Garzik <jeff@garzik.org>]

Mike Frysinger wrote:
> On 8/16/07, Jeff Garzik <jeff@garzik.org> wrote:
> > Sonic Zhang wrote:
> > > +static void bfin_set_piomode(struct ata_port *ap, struct ata_device *adev)
> > > +{
> > > +     int mode = adev->pio_mode - XFER_PIO_0;
> > > +     unsigned long base = (unsigned long)ap->ioaddr.ctl_addr;
> >
> > (added Bryan Wu to CC)
> >
> > Someone needs to need fix the bfin architecture:  the addresses on the
> > bfin_read/bfin_write functions should be 'void __iomem *' not unsigned long.
>
> there are no address pointers anymore, so there is nothing to cast ...
> the bfin_read/bfin_write macros are done in sexy asm:
> #define bfin_write8(addr,val) __asm__ __volatile__("b[%0] = %1;" ::
> "a"(addr), "d"(val))
> or i'm misunderstanding what you mean ...
>
> where do you see (unsigned long) ?

Look up (into the message you quoted).

Regardless of the implementation, the C type system should be employed 
to ensure that 'addr' is known to the compiler as 'void __iomem *' 
rather than unsigned long.

	Jeff



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