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    Subject[PATCH 4.1 18/78] dm thin metadata: delete btrees when releasing metadata snapshot
    Date
    4.1-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Joe Thornber <ejt@redhat.com>

    commit 7f518ad0a212e2a6fd68630e176af1de395070a7 upstream.

    The device details and mapping trees were just being decremented
    before. Now btree_del() is called to do a deep delete.

    Signed-off-by: Joe Thornber <ejt@redhat.com>
    Signed-off-by: Mike Snitzer <snitzer@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/md/dm-thin-metadata.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    --- a/drivers/md/dm-thin-metadata.c
    +++ b/drivers/md/dm-thin-metadata.c
    @@ -1295,8 +1295,8 @@ static int __release_metadata_snap(struc
    return r;

    disk_super = dm_block_data(copy);
    - dm_sm_dec_block(pmd->metadata_sm, le64_to_cpu(disk_super->data_mapping_root));
    - dm_sm_dec_block(pmd->metadata_sm, le64_to_cpu(disk_super->device_details_root));
    + dm_btree_del(&pmd->info, le64_to_cpu(disk_super->data_mapping_root));
    + dm_btree_del(&pmd->details_info, le64_to_cpu(disk_super->device_details_root));
    dm_sm_dec_block(pmd->metadata_sm, held_root);

    return dm_tm_unlock(pmd->tm, copy);



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