[PATCH 12/12] fs: remove default_backing_dev_info

[Tejun Heo]

On Thu, Jan 08, 2015 at 06:45:33PM +0100, Christoph Hellwig wrote:
> Now that default_backing_dev_info is not used for writeback purposes we can
> git rid of it easily:
> 
>  - instead of using it's name for tracing unregistered bdi we just use
>    "unknown"
>  - btrfs and ceph can just assign the default read ahead window themselves
>    like several other filesystems already do.
>  - we can assign noop_backing_dev_info as the default one in alloc_super.
>    All filesystems already either assigned their own or
>    noop_backing_dev_info.
> 
> Signed-off-by: Christoph Hellwig <hch at lst.de>

Reviewed-by: Tejun Heo <tj at kernel.org>

Thanks.

-- 
tejun