linux-kernel - Re: [RFC PATCH 1/4] fdomain: Resurrect driver (core)

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Date:   Sun, 28 Apr 2019 21:52:31 +0200
From:   Ondrej Zary <linux@...y.sk>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Rik Faith <faith@...unc.edu>,
        "David A . Hinds" <dahinds@...rs.sourceforge.net>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 1/4] fdomain: Resurrect driver (core)

On Wednesday 24 April 2019 08:02:12 Christoph Hellwig wrote:
> > +static void fdomain_work(struct work_struct *work)
> > +{
> > +	struct fdomain *fd = container_of(work, struct fdomain, work);
> > +	struct Scsi_Host *sh = container_of((void *)fd, struct Scsi_Host,
> > +					    hostdata);
> 
> This looks odd.  We should never need a void cast for container_of.

This cast is present in all drivers involving container_of, struct Scsi_Host and hostdata. hostdata in struct Scsi_Host is defined as "unsigned long hostdata[0]"...

-- 
Ondrej Zary