Patch "dm thin metadata: delete btrees when releasing metadata snapshot" has been added to the 4.1-stable tree

This is a note to let you know that I've just added the patch titled

    dm thin metadata: delete btrees when releasing metadata snapshot

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     dm-thin-metadata-delete-btrees-when-releasing-metadata-snapshot.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let [off-list ref] know about it.

From 7f518ad0a212e2a6fd68630e176af1de395070a7 Mon Sep 17 00:00:00 2001

From: Joe Thornber <redacted>
Date: Wed, 12 Aug 2015 15:10:21 +0100
Subject: dm thin metadata: delete btrees when releasing metadata snapshot

From: Joe Thornber <redacted>

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 <redacted>
Signed-off-by: Mike Snitzer <redacted>
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);

Patches currently in stable-queue which might be from ejt@redhat.com are

queue-4.1/dm-thin-metadata-delete-btrees-when-releasing-metadata-snapshot.patch