[PATCHv4 1/5] arm64: Add support for hooks to handle undefined instructions

[Catalin Marinas]

On Wed, Nov 12, 2014 at 11:44:48AM +0000, Punit Agrawal wrote:
> +int register_undef_hook(struct undef_hook *hook)
> +{
> +	unsigned long flags;
> +
> +	raw_spin_lock_irqsave(&undef_lock, flags);
> +	list_add(&hook->node, &undef_hook);
> +	raw_spin_unlock_irqrestore(&undef_lock, flags);
> +
> +	return 0;
> +}

I missed this. Why do we need this function to return something? I don't
see how it would fail.

-- 
Catalin