[PATCH 3/9] async: Extend kfence to allow struct embedding

[Peter Zijlstra]

On Fri, Jun 24, 2016 at 10:08:47AM +0100, Chris Wilson wrote:
> @@ -151,7 +161,11 @@ static void kfence_free(struct kref *kref)
>  
>  	WARN_ON(atomic_read(&fence->pending) > 0);
>  
> -	kfree(fence);
> +	if (fence->flags) {
> +		kfence_notify_t fn = (kfence_notify_t)fence->flags;

Maybe provide an inline helper for that conversion and also mask out the
low bits, just to be careful. You're assuming they're not set here,
which seems like a dangerous thing.

> +		fn(fence);
> +	} else
> +		kfree(fence);

Also Codingstyle wants braces on both branches if its on one.