Re: linux-next: build failure after merge of the drm-misc tree

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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@xxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxxx>
> > 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@xxxxxxxxxxxxxxxx>
> 
> 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 ...

> > ---
> >  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

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