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由 David Sterba 提交于
The commit fcebe456 ("Btrfs: rework qgroup accounting") reworked qgroups and added some new structures. Another rework of qgroup mechanics e69bcee3 ("btrfs: qgroup: Cleanup the old ref_node-oriented mechanism.") stopped using them and left uncleaned. Reviewed-by: NQu Wenruo <wqu@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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