On Wed, Jun 15, 2016 at 11:17:53AM +0100, Juri Lelli wrote:

> +		if (!raw_capacity) {
> +			raw_capacity = kzalloc(sizeof(*raw_capacity) *
> +					num_possible_cpus(), GFP_KERNEL);

kcalloc()?

> +			if (!raw_capacity) {
> +				pr_err("cpu_capacity: failed to allocate memory"
> +				       " for raw capacities\n");

It's normally better to avoid splitting errors message so people can
grep if they see the error.

> +	} else {
> +		pr_err("cpu_capacity: missing %s raw capacity "
> +		       "(fallback to 1024 for all CPUs)\n",
> +				cpu_node->full_name);

That's going to complain fairly loudly for all existing DTs isn't it and
it's kind of redundant if all the cores have the same capacity (which is
a very common case)?  How about printing an error only if we already
found one, or printing a single warning at the end if we didn't get
anything?