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    SubjectRe: [PATCH take #5] [libata] libata driver for bf548 on chip ATAPI controller.
    Mike Frysinger wrote:
    > On 8/16/07, Jeff Garzik <jeff@garzik.org> wrote:
    >> 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).
    >
    > yes, you quoted the driver, not the Blackfin core parts
    >
    >> 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.
    >
    > i agree the specific pata driver should be declared the way you
    > described, however i dont see how that has bearing on the
    > bfin_read/bfin_write macros as you seemed to indicate

    Macros completely ignore the C type system. Look at other architectures
    if you cannot figure out how to implement a static inline with stronger
    typing.

    Jeff



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