On creation of irq_desc and irq_data.

[mind entropy]

> Hi,
>
>   I am reading through mini2440 code. I am going through the init_irq
> (http://lxr.free-electrons.com/source/arch/arm/mach-s3c24xx/mach-mini2440.c#L689)
> code. In it (http://lxr.free-electrons.com/source/arch/arm/mach-s3c24xx/irq.c#L446)
> there is irq_domain_add_legacy(..) which references irq_desc and
> irq_data. I am not sure where these descriptors are created? In the
> irq_domain_add_legacy there is a lookup for irq_data from the number.
> Could someone tell where these descriptors are created?
>
> Thanks.

I think it is statically created here
https://github.com/torvalds/linux/blob/master/kernel/irq/irqdesc.c#L243
and the initialization happens in early_irq_init(..) here
https://github.com/torvalds/linux/blob/master/kernel/irq/irqdesc.c#L251.

Please correct me if I am wrong.

Thanks.