linux-kernel - Re: [RFT 00/13] constify s390 ccw_device

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Date:   Tue, 15 Aug 2017 13:30:44 +0200
From:   Heiko Carstens <heiko.carstens@...ibm.com>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>
Cc:     schwidefsky@...ibm.com, sth@...ux.vnet.ibm.com,
        hoeppner@...ux.vnet.ibm.com, jwi@...ux.vnet.ibm.com,
        ubraun@...ux.vnet.ibm.com, maier@...ux.vnet.ibm.com,
        cohuck@...hat.com, pasic@...ux.vnet.ibm.com,
        linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org
Subject: Re: [RFT 00/13] constify s390 ccw_device_id

On Tue, Aug 15, 2017 at 04:05:31PM +0530, Arvind Yadav wrote:
> ccw_device_id are not supposed to change at runtime. All functions
> working with ccw_device_id provided by <asm/ccwdev.h> work with
> const ccw_device_id. So mark ccw_device_id member of struct ccw driver
> as const. And change all driver relatively.
> 
> Arvind Yadav (13):
>   [RFT 01/13] s390: ccwdev: constify ccw_device_id
>   [RFT 02/13] s390: dasd_eckd: constify ccw_device_id
>   [RFT 03/13] s390: dasd_fba: constify ccw_device_id
>   [RFT 04/13] s390: con3215: constify ccw_device_id
>   [RFT 05/13] s390: raw3270: constify ccw_device_id
>   [RFT 06/13] s390: tape_34xx: constify ccw_device_id
>   [RFT 07/13] s390: tape_3590: constify ccw_device_id
>   [RFT 08/13] s390: vmur: constify ccw_device_id
>   [RFT 09/13] s390: ctcm: constify ccw_device_id
>   [RFT 10/13] s390: lcs: constify ccw_device_id
>   [RFT 11/13] s390: qeth: constify ccw_device_id
>   [RFT 12/13] s390: zfcp: constify ccw_device_id
>   [RFT 13/13] s390: virtio: constify ccw_device_id

Did the constify work reveal a single bug until now? This causes a lot of
code churn, and I'm failing to see an added value here.
In addition this is not worth splitting it into 13(!) patches.