Re: [PATCH RFC: linux-next 1/2] irq: Add CPU mask affinity hint callback framework

Thomas Gleixner
2010-04-27T12:32:36Z

On Sun, 18 Apr 2010, Peter P Waskiewicz Jr wrote:
> +/**
> + * struct irqaffinityhint - per interrupt affinity helper
> + * @callback: device driver callback function
> + * @dev: reference for the affected device
> + * @irq: interrupt number
> + */
> +struct irqaffinityhint {
> + irq_affinity_hint_t callback;
> + void *dev;
> + int irq;
> +};

Why do you need that extra data structure ? The device and the irq
number are known, so all you need is the callback itself. So no need
for allocating memory ....

> +static ssize_t irq_affinity_hint_proc_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *pos)
> +{
> + /* affinity_hint is read-only from proc */
> + return -EOPNOTSUPP;
> +}
> +

Why do you want a write function when the file is read only ?

Thanks,

tglx