Revert "Revert "block, bfq: honor already-setup queue merges""
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.189 by commit 931aff627469a75c77b9fd3823146d0575afffd6. For more details please see the references link.