irqdomain: Export __irq_domain_alloc_irqs() to modules

The Apple PCIe controller driver allocates interrupts generated
by the PCIe ports, and uses irq_domain_alloc_irqs() for that.
THis is an inline function that uses __irq_domain_alloc_irqs()
as a backend.

Since the driver can be built as a module, __irq_domain_alloc_irqs()
must be exported.

Fixes: 201adeaa9d82 ("PCI: apple: Add INTx and per-port interrupt support")
Signed-off-by: Marc Zyngier <maz@kernel.org>
---

Notes:
    Since the offending code is only in the PCI tree so far,
    it would make sense if Lorenzo could take this patch directly.

 kernel/irq/irqdomain.c | 1 +
 1 file changed, 1 insertion(+)

On Mon, Oct 04, 2021 at 04:05:52PM +0100, Marc Zyngier wrote:
> The Apple PCIe controller driver allocates interrupts generated
> by the PCIe ports, and uses irq_domain_alloc_irqs() for that.
> THis is an inline function that uses __irq_domain_alloc_irqs()
> as a backend.
> 
> Since the driver can be built as a module, __irq_domain_alloc_irqs()
> must be exported.
> 
> Fixes: 201adeaa9d82 ("PCI: apple: Add INTx and per-port interrupt support")

I have squashed this patch into the commit it is fixing and pushed
pci/apple out.

I could have merged it as a standalone patch before the commit it is
fixing but it would not make sense on its own I believe, happy to
rectify the branch in case that's preferred.

Lorenzo

> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
> 
> Notes:
>     Since the offending code is only in the PCI tree so far,
>     it would make sense if Lorenzo could take this patch directly.
> 
>  kernel/irq/irqdomain.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
> index 5a698c1f6cc6..40e85a46f913 100644
> --- a/kernel/irq/irqdomain.c
> +++ b/kernel/irq/irqdomain.c
> @@ -1502,6 +1502,7 @@ int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
>  	irq_free_descs(virq, nr_irqs);
>  	return ret;
>  }
> +EXPORT_SYMBOL_GPL(__irq_domain_alloc_irqs);
>  
>  /* The irq_data was moved, fix the revmap to refer to the new location */
>  static void irq_domain_fix_revmap(struct irq_data *d)
> -- 
> 2.30.2
>

On Mon, 04 Oct 2021 16:59:15 +0100,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> wrote:
> 
> On Mon, Oct 04, 2021 at 04:05:52PM +0100, Marc Zyngier wrote:
> > The Apple PCIe controller driver allocates interrupts generated
> > by the PCIe ports, and uses irq_domain_alloc_irqs() for that.
> > THis is an inline function that uses __irq_domain_alloc_irqs()
> > as a backend.
> > 
> > Since the driver can be built as a module, __irq_domain_alloc_irqs()
> > must be exported.
> > 
> > Fixes: 201adeaa9d82 ("PCI: apple: Add INTx and per-port interrupt support")
> 
> I have squashed this patch into the commit it is fixing and pushed
> pci/apple out.
> 
> I could have merged it as a standalone patch before the commit it is
> fixing but it would not make sense on its own I believe, happy to
> rectify the branch in case that's preferred.

The final patch has links to both patches on the list, so that's
absolutely fine by me.

Thanks,

	M.