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To: linux-btrfs@vger.kernel.org
From: Gabriel de Perthuis <g2p.code@gmail.com>
Subject: Re: [PATCH v3 2/2] Btrfs: online data deduplication
Date: Wed, 1 May 2013 18:07:57 +0000 (UTC)
Message-ID: <klrlls$l60$1@ger.gmane.org>
References: <1367425659-10803-1-git-send-email-bo.li.liu@oracle.com>
	<1367425659-10803-3-git-send-email-bo.li.liu@oracle.com>
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>  #define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
>  				    struct btrfs_ioctl_dev_replace_args)
> +#define BTRFS_IOC_DEDUP_REGISTER	_IO(BTRFS_IOCTL_MAGIC, 54)

This number has already been used by the offline dedup patches.