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Date:   Thu, 23 Jun 2022 17:48:04 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Mike Snitzer <snitzer@kernel.org>
Cc:     Guenter Roeck <linux@roeck-us.net>, keescook@chromium.org,
        sarthakkukreti@google.com, stable@vger.kernel.org,
        Oleksandr Tymoshenko <ovt@google.com>, dm-devel@redhat.com,
        regressions@lists.linux.dev
Subject: Re: [5.4.y PATCH v2] dm: remove special-casing of bio-based
 immutable singleton target on NVMe
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On Tue, Jun 21, 2022 at 12:35:04PM -0400, Mike Snitzer wrote:
> Commit 9c37de297f6590937f95a28bec1b7ac68a38618f upstream.
> 
> There is no benefit to DM special-casing NVMe. Remove all code used to
> establish DM_TYPE_NVME_BIO_BASED.
> 
> Also, remove 3 'struct mapped_device *md' variables in __map_bio() which
> masked the same variable that is available within __map_bio()'s scope.
> 
> Tested-by: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
> ---
>  drivers/md/dm-table.c         | 32 +--------------
>  drivers/md/dm.c               | 73 ++++-------------------------------
>  include/linux/device-mapper.h |  1 -
>  3 files changed, 9 insertions(+), 97 deletions(-)

Now queued up, thanks.

greg k-h