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    SubjectRe: [PATCH 1/3] tty: serial: Use hub6_serial_X when CONFIG_SERIAL_8250_HUB6 is defined
    Date
    On Friday 11 March 2011, Alan Cox wrote:
    > Most of these are not needed
    >
    > It is also such a miniscule amount of code it seems like it does not
    > justify the complexity of being configurable this way.

    The point is that the 8250 driver stands in the way of allowing
    to build the kernel on architectures that do not support ISA or PCI
    I/O spaces. Right now, the common solution is to do

    #define inb(x) readb(void __iomem *)(x))

    or some variation of this. It's fine as long as this code never gets
    called, but incorrect nonetheless.

    I think it would be much cleaner if architectures that cannot do this
    would not have to define those functions and we could make sure that
    all drivers that do inb() have correct Kconfig dependencies.

    Arnd


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