Re: [PATCH v6 04/10] genirq: Introduce common irq_force_complete_move() implementation

[Frank Scheiner]

On 03.04.25 17:03, Thomas Gleixner wrote:
> On Thu, Apr 03 2025 at 15:13, Frank Scheiner wrote:
>> this change, specfically the introduction of irq_force_complete_move()
>> to `kernel/irq/migration.c`, strangely breaks our builds for the hp-sim
>> platform (i.e. Linux/ia64 for Ski):
>
> arch/itanic has hit the iceberg and sank with the release of v6.7...

Ha, ha, not in our waters. :-) Still I'm glad I could help finding
errors in Linux by building for ia64.


>> So I guess, either the requirement in `linux/include/linux/irq.h` needs
>> to go, or the use of "d->parent_data" or the whole of
>> irq_force_complete_move() and its use needs to be guarded as well.
>
> Guessing is not a really good approach to solve a technical problem :)

Thanks for the advice, though guessing was not involved here. It's just
a way to say that I'm not sure what the right solution might be in this
case. And then I'd rather leave such fixes to the experts in the
specific field.

> ---
> --- a/kernel/irq/migration.c
> +++ b/kernel/irq/migration.c
> @@ -37,7 +37,7 @@ bool irq_fixup_move_pending(struct irq_d
>
>  void irq_force_complete_move(struct irq_desc *desc)
>  {
> -	for (struct irq_data *d = irq_desc_get_irq_data(desc); d; d = d->parent_data) {
> +	for (struct irq_data *d = irq_desc_get_irq_data(desc); d; d = irqd_get_parent_data(d)) {
>  		if (d->chip && d->chip->irq_force_complete_move) {
>  			d->chip->irq_force_complete_move(d);
>  			return;
>

This fxes the build for me for that file. Much obliged.
```
  CC      kernel/irq/migration.o
```

Cheers,
Frank