linux-kernel - Re: [PATCH] staging: fieldbus: anybuss: force address space conversion

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Message-ID: <CAGngYiXLN-oT_b9d1kRyBrrFMALhKO-KnuwXB0MjVq0NFc01Xw@mail.gmail.com>
Date:   Tue, 21 May 2019 11:19:59 -0400
From:   Sven Van Asbroeck <thesven73@...il.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Greg KH <gregkh@...uxfoundation.org>, devel@...verdev.osuosl.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] staging: fieldbus: anybuss: force address space conversion

On Tue, May 21, 2019 at 11:13 AM Dan Carpenter <dan.carpenter@...cle.com> wrote:
>
> There is no need to use __force.  Just:
>
>         void __iomem *base = (void __iomem *)context;
>
> For the rest as well.

Yes, that appears to work for 'void *' -> __iomem, but not the other way around:

+       return devm_regmap_init(dev, NULL, (void *)base, &regmap_cfg);

sparse generates:
drivers/staging/fieldbus/anybuss/arcx-anybus.c:156:16: warning: cast
removes address space of expression

Would it be a ok solution to use __force in this instance only?