linux-kernel - Re: [PATCH 3/6] regmap: Add the rbtree cache support

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Date:	Mon, 05 Sep 2011 18:15:49 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>
CC:	linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>,
	Graeme Gregory <gg@...mlogic.co.uk>,
	Samuel Oritz <sameo@...ux.intel.com>
Subject: Re: [PATCH 3/6] regmap: Add the rbtree cache support

On 09/05/2011 03:50 PM, Dimitris Papastamos wrote:
> [...]
> +
> +static int regcache_rbtree_init(struct regmap *map)
> +{
> +	struct regcache_rbtree_ctx *rbtree_ctx;
> +	int i;
> +	int ret;
> +
> +	map->cache = kmalloc(sizeof *rbtree_ctx, GFP_KERNEL);
> +	if (!map->cache)
> +		return -ENOMEM;
> +
> +	rbtree_ctx = map->cache;
> +	rbtree_ctx->root = RB_ROOT;
> +	rbtree_ctx->cached_rbnode = NULL;
> +
> +	for (i = 0; i < map->num_cache_defaults; i++) {
> +		ret = regcache_rbtree_write(map,
> +					    map->cache_defaults[ret].reg,
> +					    map->cache_defaults[ret].def);

map->cache_defaults[i]

> +		if (ret)
> +			goto err;
> +	}
> +
> +	return 0;
> +
> +err:
> +	regcache_exit(map);
> +	return ret;
> +}
> [...]
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