On Mon, Oct 05 2020 at 16:28, David Woodhouse wrote:

From: David Woodhouse <redacted>
It already takes an array of affinities for each individual irq being
allocated but that's awkward to allocate and populate in the case
where they're all the same and inherited from the irqdomain, so pass
the default in separately as a simple cpumask.

So we need another cpumask argument exposed to the world just because
it's so hard to extend struct irq_affinity_desc so it supports that use
case as well. It's not written in stone that this struct can only
support arrays.

Signed-off-by: David Woodhouse <redacted>
---
 include/linux/irq.h    | 10 ++++++----
 kernel/irq/devres.c    |  8 ++++++--
 kernel/irq/irqdesc.c   | 10 ++++++++--
 kernel/irq/irqdomain.c |  6 +++---

git grep __irq_alloc_descs() might help you to find _all_ instances ...

Thanks,

        tglx