Re: [PATCH v4 5/6] x86/io_delay: Switch io_delay() default mechanism to "none"

[Jürgen Groß]

On 20.03.26 23:02, Borislav Petkov wrote:
> On Mon, Jan 19, 2026 at 07:26:31PM +0100, Juergen Gross wrote:
> > The habit to delay some port operations via io_delay() is probably a
> > no longer needed relict from i386 times.
> >
> > Switch the default to no longer do delays for port operations. In case
> > this is breaking some still supported hardware, the default can still
> > be overwritten via boot parameter.
>
> So machines which worked perfectly fine until now, would break and would all
> of a sudden need a cmdline param?

This patch is the result of a suggestion by Ingo [1]. He even wanted to rip out
the io_delay() code completely.

If you don't like that, we can just drop patches 5 and 6 of the series.


Juergen

[1]: https://lore.kernel.org/lkml/aUFjRDqbfWMsXvvS@xxxxxxxxx/

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