dm: remove free_table_devices
free_table_devices just warns and frees all table_device structures when
the target removal did not remove them. This should never happen, but
if it did, just freeing the structure without deleting them from the
list or cleaning up the resources would not help at all. So just WARN on
a non-empty list instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Mike Snitzer <snitzer@kernel.org>
Link: https://lore.kernel.org/r/20221115141054.1051801-3-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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