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

[Punit Agrawal]

Hi Catalin,

Catalin Marinas <catalin.marinas at arm.com> writes:

> 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.

You're right. I don't remember why I changed the return type when
porting this over from arm. I'll update this and affected code.

Cheers,
Punit