linux-kernel - Re: [Bcache v13 11/16] bcache: Core btree code

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Date:	Thu, 10 May 2012 11:49:47 -0700
From:	Joe Perches <joe@...ches.com>
To:	Kent Overstreet <koverstreet@...gle.com>
Cc:	linux-bcache@...r.kernel.org, linux-kernel@...r.kernel.org,
	dm-devel@...hat.com, tejun@...gle.com, agk@...hat.com
Subject: Re: [Bcache v13 11/16] bcache: Core btree code

On Wed, 2012-05-09 at 23:10 -0400, Kent Overstreet wrote:
> Signed-off-by: Kent Overstreet <koverstreet@...gle.com>
[]
> +
> +void btree_read_done(struct closure *cl)
> +{
[]
> +	if (b->written < btree_blocks(b))
> +		bset_init_next(b);
> +
> +	if (0) {
> +err:		set_btree_node_io_error(b);
> +		cache_set_error(b->c, "%s at bucket %lu, block %zu, %u keys",
> +				err, PTR_BUCKET_NR(b->c, &b->key, 0),
> +				index(i, b), i->keys);
> +	}

Hi Kent

trivia:  This if (0) is an exceedingly ugly style.

I'd much prefer:

	if (foo)
		bar();

	goto exit;

err:
	set_btree_node_io_error(b);
	cache_set_error(b->c, "%s at bucket %lu, block %zu, %u keys",
			err, PTR_BUCKET_NR(b->c, &b->key, 0),
			index(i, b), i->keys);

exit:
	etc...


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