Hi! patches in this series fix the most urgent bugs that were introduced by commit 165a5e22fafb "block: Move bdi_unregister() to del_gendisk()" and by 0dba1314d4f8 "scsi, block: fix duplicate bdi name registration crashes". In fact before these commits we had a different set of problems in the code but they were less visible :). I'm still waiting for test confirmation from Omar and Arthur Marsh who reported issues but I'm not able to hit any problem anymore in my testing. I think it would be nice to get the patches to rc2 so to speed up things I'm posting the patches now so that review can happen in parallel with the testing. Other BDI handling fixes I have in my queue can wait a bit more since they are either theoretical or long-standing issues. So I'll repost them once these four are sorted out. Honza
