Re: [patch 15/17] s390: convert /proc/cio_ignore.

[Andrew Morton]

Martin Schwidefsky <schwidefsky@xxxxxxxxxx> wrote:
>
> +static void *
>  +cio_ignore_proc_seq_start(struct seq_file *s, loff_t *offset)
>  +{
>  +	struct ccwdev_iter *iter;
>  +
>  +	if (*offset > __MAX_SUBCHANNEL)
>  +		return NULL;
>  +	iter = kmalloc(sizeof(struct ccwdev_iter), GFP_KERNEL);
>  +	if (!iter)
>  +		return ERR_PTR(-ENOMEM);
>  +	memset(iter, 0, sizeof(struct ccwdev_iter));

kzalloc()

>  +	iter->devno = *offset;
>  +	return iter;
>  +}
>  +
>  +static void
>  +cio_ignore_proc_seq_stop(struct seq_file *s, void *it)
>  +{
>  +	if (!IS_ERR(it))
>  +		kfree(it);
>  +}
>  +
>  +static void *
>  +cio_ignore_proc_seq_next(struct seq_file *s, void *it, loff_t *offset)
>  +{
>  +	struct ccwdev_iter *iter;
>  +
>  +	if (*offset > __MAX_SUBCHANNEL)
>  +		return NULL;
>  +	iter = (struct ccwdev_iter *)it;

Unneeded (and undesirable) cast of void*.

>  +	iter->devno++;
>  +	(*offset)++;
>  +	return iter;
>  +}
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