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From:   Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Mon, 2 Nov 2020 11:28:15 +0100
Message-ID: <CAKMK7uFKRHnYFYw19b-iQHfzQisqn0Zms+1+bxVa6CSbExTP8w@mail.gmail.com>
Subject: Re: linux-next: build failure after merge of the drm-misc tree
To:     "Michael S. Tsirkin" <mst@redhat.com>
Cc:     Stephen Rothwell <sfr@canb.auug.org.au>,
        Christoph Hellwig <hch@infradead.org>,
        Intel Graphics <intel-gfx@lists.freedesktop.org>,
        DRI <dri-devel@lists.freedesktop.org>,
        =?UTF-8?Q?Christian_K=C3=B6nig?= <christian.koenig@amd.com>,
        Joerg Roedel <jroedel@suse.de>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>
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On Mon, Nov 2, 2020 at 11:23 AM Michael S. Tsirkin <mst@redhat.com> wrote:
>
> On Mon, Nov 02, 2020 at 10:28:34AM +0100, Daniel Vetter wrote:
> > On Mon, Nov 2, 2020 at 2:43 AM Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> > >
> > > Hi all,
> > >
> > > After merging the drm-misc tree, today's linux-next build (arm
> > > multi_v7_defconfig) failed like this:
> > >
> > > In file included from drivers/gpu/drm/nouveau/nouveau_ttm.c:26:
> > > include/linux/swiotlb.h: In function 'swiotlb_max_mapping_size':
> > > include/linux/swiotlb.h:99:9: error: 'SIZE_MAX' undeclared (first use in this function)
> > >    99 |  return SIZE_MAX;
> > >       |         ^~~~~~~~
> > > include/linux/swiotlb.h:7:1: note: 'SIZE_MAX' is defined in header '<stdint.h>'; did you forget to '#include <stdint.h>'?
> > >     6 | #include <linux/init.h>
> > >   +++ |+#include <stdint.h>
> > >     7 | #include <linux/types.h>
> > > include/linux/swiotlb.h:99:9: note: each undeclared identifier is reported only once for each function it appears in
> > >    99 |  return SIZE_MAX;
> > >       |         ^~~~~~~~
> > >
> > > Caused by commit
> > >
> > >   abe420bfae52 ("swiotlb: Introduce swiotlb_max_mapping_size()")
> > >
> > > but only exposed by commit
> > >
> > >   4dbafbd30aef ("drm/nouveu: fix swiotlb include")
> > >
> > > I applied the following fix for today:
> > >
> > > From: Stephen Rothwell <sfr@canb.auug.org.au>
> > > Date: Mon, 2 Nov 2020 12:34:57 +1100
> > > Subject: [PATCH] swiotlb: using SIZE_MAX needs limits.h included
> > >
> > > Fixes: abe420bfae52 ("swiotlb: Introduce swiotlb_max_mapping_size()")
> > > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
> >
> > I think simplest if this lands through dma-api tree into current -rc
> > kernels. Or should we just put this into drm-misc-next since that's
> > where the problem shows up? Christoph, any preference from dma-api
> > side?
> > -Daniel
>
>
> Or I can merge it since I merged the original patch causing the
> issue ...

Works for me too.
-Daniel
>
> > > ---
> > >  include/linux/swiotlb.h | 3 +++
> > >  1 file changed, 3 insertions(+)
> > >
> > > diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
> > > index 513913ff7486..ed9de7855d3b 100644
> > > --- a/include/linux/swiotlb.h
> > > +++ b/include/linux/swiotlb.h
> > > @@ -5,6 +5,9 @@
> > >  #include <linux/dma-direction.h>
> > >  #include <linux/init.h>
> > >  #include <linux/types.h>
> > > +#ifndef CONFIG_SWIOTLB
> > > +#include <linux/limits.h>
> > > +#endif
> > >
> > >  struct device;
> > >  struct page;
> > > --
> > > 2.28.0
> > >
> > > --
> > > Cheers,
> > > Stephen Rothwell
> >
> >
> >
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch
>


-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch