linux-kernel - RE: [PATCH v2 1/5] scsi: BusLogic: Fix missing `pr

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Date:   Wed, 21 Apr 2021 14:28:41 +0200 (CEST)
From:   "Maciej W. Rozycki" <macro@...am.me.uk>
To:     David Laight <David.Laight@...LAB.COM>
cc:     Joe Perches <joe@...ches.com>, Khalid Aziz <khalid@...ehiking.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Christoph Hellwig <hch@....de>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: RE: [PATCH v2 1/5] scsi: BusLogic: Fix missing `pr_cont' use

On Wed, 21 Apr 2021, David Laight wrote:

> > Update BusLogic driver's messaging system to use `pr_cont' for
> > continuation lines, bringing messy output:
> 
> If reasonably possible it is best to avoid use of pr_cont().

 I know, however for that the whole driver's messaging system would have 
to be redesigned.  Joe (cc-ed) has offered to do it with the original 
iteration, however I believe consensus has been it will best be done as a 
separate follow-up change, while this small fix can be easily backported.

> If there are concurrent writes from multiple cpu I believe
> the writes still get separated.
> (Something has to give...)

 NB this driver may not see a lot of SMP use as I reckon it's had some 
portability issues, and in any case the hardware requires port I/O which 
precludes its use with some of the most recent PCIe systems which do not 
support PCI I/O cycles anymore.  And older systems were often UP.  Not 
that the driver should not be kept in a clean style of course.

  Maciej