Re: Can we kill f inb_p, outb_p and other random I/O on port 0x80, in 2.6?

[Eric W. Biederman]

Jamie Lokier <jamie@xxxxxxxxxxxxx> writes:

> Arjan van de Ven wrote:
> > The first person to complain about the extra branch miss in udelay for
> > this will get laughed at by me ;)
> 
> udelay(1) is too slow on a 386 even without the branch miss.

Hmm.  I will have to test that one.
 
> If you think I/O operations are infinitely slower than other
> instructions, please explain why there is asm-optimised I/O code in
> asm-i386/floppy.h.
> 
> :)

Because the kernel was initially written in assembly and then fixed?

Eric

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