linux-kernel - Re: [PATCH 3/6] block: Create scsi

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Message-ID: <24d36869-e037-042d-cb16-20a81b34eb76@kernel.dk>
Date:   Wed, 23 May 2018 08:31:19 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Kees Cook <keescook@...omium.org>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        James Bottomley <James.Bottomley@...senpartnership.com>,
        Tejun Heo <tj@...nel.org>, Borislav Petkov <bp@...en8.de>,
        "David S. Miller" <davem@...emloft.net>,
        "Manoj N. Kumar" <manoj@...ux.vnet.ibm.com>,
        "Matthew R. Ochs" <mrochs@...ux.vnet.ibm.com>,
        Uma Krishnan <ukrishn@...ux.vnet.ibm.com>,
        linux-block <linux-block@...r.kernel.org>,
        linux-ide@...r.kernel.org, linux-scsi@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/6] block: Create scsi_sense.h for SCSI and ATAPI

On 5/23/18 8:25 AM, Christoph Hellwig wrote:
> On Wed, May 23, 2018 at 08:13:56AM -0600, Jens Axboe wrote:
>>> Should I move to code to a new drivers/scsi/scsi_sense.c and add it to
>>> drivers/scsi/Makefile as:
>>>
>>> obj-$(CONFIG_BLK_SCSI_REQUEST)    += scsi_sense.o
>>>
>>> Every place I want to use the code is already covered by
>>> CONFIG_BLK_SCSI_REQUEST, so it seems like I just need to know where to
>>> put the .c file. :P
>>
>> I think this is so much saner than a SCSI select or dependency, so I'll
>> have to disagree with Martin and Christoph. Just put it in drivers/scsi,
>> if it's the location they care about.
> 
> I actually plan to remove CONFIG_BLK_SCSI_REQUEST in a merge window
> or two.  The only users are scsi and the ide layer, (virtio_blk
> support has already been accidentally disabled for a while), and getting
> rid of it allows to to shrink and simply the scsi data structures.
> 
> But if you want this for now lets keep scsi_sense.c in drivers/scsi
> but depend on CONFIG_BLK_SCSI_REQUEST, that is easy enough to fix up.

It could be a stand-alone dependency, doesn't have to be BLK_SCSI_REQUEST.
BLA_SCSI_SENSE or something would do. I don't care too much about that,
mostly getting rid of the entire stack dependency.

-- 
Jens Axboe