Please add 9c4f61f01d269815bb7c37be3ede59c5587747c6 to stable

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Hi stable friends,

Can you please backport this one to 3.19.y. It fixes a bug introduced by:

381cf6587f8a8a8e981bc0c1aaaa8859b51dc756, which was tagged for stable 3.14+

The symptoms of the bug are deadlocks during log reply after a crash. The patch wasn't intentionally fixing the deadlock, which is why we missed it when tagging fixes.

Please put this commit everywhere you've cherry-picked 381cf6587f8a8a8e981bc0c1aaaa8859b51dc756

commit 9c4f61f01d269815bb7c37be3ede59c5587747c6
Author: David Sterba <dsterba@xxxxxxx>
Date:   Fri Jan 2 19:12:57 2015 +0100

   btrfs: simplify insert_orphan_item

   We can search and add the orphan item in one go,
   btrfs_insert_orphan_item will find out if the item already exists.

   Signed-off-by: David Sterba <dsterba@xxxxxxx>

-chris



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