AW: AW: [PATCH] clocksource: rtl-otto: Change driver to use __raw reads and writes

[markus.stockhausen]

> Von: Rustam Adilov <adilov@xxxxxxxxxxx> 
> Gesendet: Freitag, 15. Mai 2026 16:33
> An: markus.stockhausen@xxxxxx
> Betreff: Re: AW: [PATCH] clocksource: rtl-otto: Change driver to use __raw
reads and writes
> ...
> > IIRC the current functions use memory barriers while the
> > new ones do not. Timers are critical and cost me a lot
> > of time in the past [1]. We nearly lost support for several
> > devices last year. So I like to have at least some stability 
> > confirmation from downstream.
>
> As far as i can see, if you untangle the the BUILDIO_MEM(l, u32) in [1]
> you should see they do have barriers as denoted by barrier argument being
set.
> So that means, in MIPS, both readl/writel are the same as their __raw
variants.
> And both ioread32/iowrite32 are using readl/writel under the hood so...

Hi,

will the __relaxed functions serve your IO_SWAP scenario too?

Markus