Re: [PATCH 3/8] bdi: add a ->dev_name field to struct backing_dev_info

[Greg KH]

On Thu, Apr 16, 2020 at 09:15:14AM +0200, Christoph Hellwig wrote:
> Cache a copy of the name for the life time of the backing_dev_info
> structure so that we can reference it even after unregistering.
> 
> Fixes: 68f23b89067f ("memcg: fix a crash in wb_workfn when a device disappears")
> Reported-by: Yufen Yu <yuyufen@xxxxxxxxxx>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>