Re: [PATCH] serial: imx: drop workaround for forced irq threading

[Sebastian Andrzej Siewior]

On 2021-03-22 14:40:32 [+0100], Uwe Kleine-König wrote:
> From a strictly logically point of view you indeed cannot. But if you go
> to the street and say to people there that they can park their car in
> this street free of charge between Monday and Friday, I expect that most
> of them will assume that they have to pay for parking on weekends.

If I hear that parking is free on weekdays and on paid on weekends, I
expect it to be a scam.

Uwe, the patch reverts a change which was needed for !RT + threadirqs.
The commit message claims that since the referenced commit "… interrupt
handlers always run with interrupts disabled on non-RT… ". This has
nothing to do with _this_ change. It argues why the workaround is not
needed.
If the referenced commit breaks RT then this is another story.

> So when you said that on on-RT the reason why it used to need a
> workaround is gone made me wonder what that implies for RT.

There was never reason (or a lockdep splat) for it on RT. If so you
should have seen it, right?

Sebastian