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Jan Kara authored
Most users will want to unregister bdi when dropping last reference to a bdi. Only a few users (like block devices) want to play more complex tricks with bdi registration and unregistration. So unregister bdi when the last reference to bdi is dropped and just make sure we don't unregister the bdi the second time if it is already unregistered. Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Jan Kara <jack@suse.cz> Signed-off-by:
Jens Axboe <axboe@fb.com>
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