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Date: Wed, 13 Dec 2023 00:53:05 -0800
From: Christoph Hellwig <hch@infradead.org>
To: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
	David Sterba <dsterba@suse.com>, linux-btrfs@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 08/13] btrfs: factor out block mapping for RAID5/6
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References: <20231212-btrfs_map_block-cleanup-v1-0-b2d954d9a55b@wdc.com>
 <20231212-btrfs_map_block-cleanup-v1-8-b2d954d9a55b@wdc.com>
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> +static void map_blocks_for_raid56(struct btrfs_chunk_map *map,
> +				  enum btrfs_map_op op,
> +				  struct btrfs_io_geometry *io_geom,
> +				  u64 logical, u64 *length)
> +{
> +	int data_stripes = nr_data_stripes(map);
> +
> +	if (op != BTRFS_MAP_READ || io_geom->mirror_num > 1) {

Any reason to not have separate read/write helpers here given that
they don't really share anything?