On Fri, Nov 13, 2020 at 09:27:22AM +0800, Ming Lei wrote:

quoted

From a519f421957a1205918e9bcc15087d15234e4e9f Mon Sep 17 00:00:00 2001

From: Ming Lei <redacted>
Date: Thu, 12 Nov 2020 09:56:02 +0800
Subject: [PATCH V2 3/3] Revert "block: Fix a lockdep complaint triggered by
 request queue flushing"

This reverts commit b3c6a59975415bde29cfd76ff1ab008edbf614a9.

Now we can avoid nvme-loop lockdep warning of 'lockdep possible recursive
locking' by nvme-loop's lock class, no need to apply dynamically
allocated lock class key, so revert commit b3c6a5997541("block: Fix a
lockdep complaint triggered by request queue flushing").

This way fixes horrible SCSI probe delay issue on megaraid_sas(host_tagset is 1),
and it is reported the whole probe may take more than half an hour. The reason

There are a bunch of overly long lines in the commit log.

Otherwise this looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>