linux-kernel - Re: [PATCH 4/5] sh: split arch/sh/mm/consistent.c

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Date:   Tue, 24 Jul 2018 13:43:34 +0200
From:   Christoph Hellwig <hch@....de>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Jacopo Mondi <jacopo@...ndi.org>, Christoph Hellwig <hch@....de>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>,
        Jacopo Mondi <jacopo+renesas@...ndi.org>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        Linux IOMMU <iommu@...ts.linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        lkp@...el.com
Subject: Re: [PATCH 4/5] sh: split arch/sh/mm/consistent.c

On Mon, Jul 23, 2018 at 10:49:39AM +0200, Geert Uytterhoeven wrote:
> > > +     *dma_handle = virt_to_phys(ret);
> > > +     if (!WARN_ON(!dev))
> > > +             *dma_handle - PFN_PHYS(dev->dma_pfn_offset);
> > vs
> > > -     *dma_handle = virt_to_phys(ret);
> > > -     if (!WARN_ON(!dev))
> > > -             *dma_handle -= PFN_PHYS(dev->dma_pfn_offset);
> 
> Doesn't look right to me, neither.
> 
> No complaints for 0day? My gcc says:
> 
>     error: statement with no effect [-Werror=unused-value]

For some reason 0day has failed me multiple times for sh.  Does the
0day bot even cover sh at all?