Re: [PATCH tip:irq/core v1] genirq: remove auto-set of the mask when setting the hint

[Thomas Gleixner]

On Mon, May 17 2021 at 18:26, Robin Murphy wrote:
> On 2021-05-17 17:57, Nitesh Lal wrote:
> I'm not implying that there isn't a bug, or that this code ever made 
> sense in the first place, just that fixing it will unfortunately be a 
> bit more involved than a simple revert. This patch as-is *will* subtly 
> break at least the system PMU drivers currently using

s/using/abusing/

> irq_set_affinity_hint() - those I know require the IRQ affinity to 
> follow whichever CPU the PMU context is bound to, in order to meet perf 
> core's assumptions about mutual exclusion.

Which driver is that?

Thanks,

        tglx