Messages in this thread | | | Date | Sat, 8 Dec 2007 21:04:27 +0000 | From | Alan Cox <> | Subject | Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops |
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> The point here is that Linux is NOT using a defined-to-be "unused" > port. It IS using the "diagnostic" port, and talking to a diagnostic > device that *is* used, and may be present.
Just like millions of other pieces of software from the same era.
> 2) Start a background task with the maintainers of drivers to clean up > their code regarding these short delays for slow devices (note that it's > never because the *bus* is slow, but because the *device* is slow.) > Perhaps this could be helped by "deprecating" the _p calls and > suggesting an alternative that requires the coder to be precise about > what the delay is for, and how long it is supposed to be, perhaps on a > per-machine basis.
Send patches. For a lot of the devices we know what the requirements are as its locked to ISA cycle times.
Alan
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