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SubjectRe: Can we kill f inb_p, outb_p and other random I/O on port 0x80, in 2.6?
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In article <m1wuc0io78.fsf@ebiederm.dsl.xmission.com>,
Eric W. Biederman <ebiederm@xmission.com> wrote:
| Jamie Lokier <jamie@shareable.org> writes:

| > Unfortunately, there are a lot of drivers, and a lot of x86
| > arch-specific code, which use the delay operaters. There's no real
| > way to verify that all the drivers are fine when the delay is reduced
| > or removed.
|
| We just need something sufficiently good. If the delay is removed
| on a system that needs it someone will complain.

The only problem with that is that is that (a) a complaint and a dollar
will get you a cheap beer, but this is Linux and no one *needs* to fix
it, therefore not breaking it becomes more important. The top developers
are not running legacy 386's, I bet. And (b) if the problem comes up
months from now, will anyone think to try timing changes for "every once
in a while" problems.

I really like the isa_delay() idea, or similar, which will be in a
single place and probably get enough attention to make it work. It just
sounds like a safer way to go with equal benefits.
--
bill davidsen <davidsen@tmr.com>
CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.
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