Re: [PATCH RFC 01/14] block, bfq: introduce the BFQ-v0 I/O scheduler as an extra scheduler

[Jens Axboe]

> +/**
> + * bfq_entity_of - get an entity from a node.
> + * @node: the node field of the entity.
> + *
> + * Convert a node pointer to the relative entity.  This is used only
> + * to simplify the logic of some functions and not as the generic
> + * conversion mechanism because, e.g., in the tree walking functions,
> + * the check for a %NULL value would be redundant.
> + */
> +static struct bfq_entity *bfq_entity_of(struct rb_node *node)
> +{
> +	struct bfq_entity *entity = NULL;
> +
> +	if (node)
> +		entity = rb_entry(node, struct bfq_entity, rb_node);
> +
> +	return entity;
> +}

Get rid of pointless wrappers like this, just use rb_entry() in the
caller. It's harmful to the readability of the code to have to lookup
things like this, if it's a list_entry or rb_entry() in the caller you
know exactly what is going on immediately.

-- 
Jens Axboe