Re: [PATCH] drm/armada: Fix compile fail

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On Fri, Dec 30, 2016 at 05:33:38PM +0100, Daniel Vetter wrote:
> I reported the include issue for tracepoints a while ago, but nothing
> seems to have happened. Now it bit us, since the drm_mm_print
> conversion was broken for armada. Fix them both.

Nothing's happened because I haven't had an opportunity to investigate
yet.  It's not as simple as you think...

This has been tested over several kernel versions before submission,
and it's also been sitting in my build tree for a while before sending
upstream.  At no point have I seen the failure you are reporting.

The tracepoints have been in use on 4.7 and 4.8 kernels, and it builds
fine there without any changes.  It's been in my nightly builder, which
has found no problems with it, eg, 4.9 allmodconfig:

  CC [M]  drivers/gpu/drm/armada/armada_crtc.o
  CC [M]  drivers/gpu/drm/armada/armada_drv.o
  CC [M]  drivers/gpu/drm/armada/armada_fb.o
  CC [M]  drivers/gpu/drm/armada/armada_fbdev.o
  CC [M]  drivers/gpu/drm/armada/armada_gem.o
  CC [M]  drivers/gpu/drm/armada/armada_overlay.o
  CC [M]  drivers/gpu/drm/armada/armada_trace.o
  CC [M]  drivers/gpu/drm/armada/armada_510.o
  CC [M]  drivers/gpu/drm/armada/armada_debugfs.o
  LD [M]  drivers/gpu/drm/armada/armada.o

So the question remains: why do you see it, and I don't - there's
something different in our build environments that's triggering it.
I always build with a separated object tree - maybe you build in the
same tree.  Does the problem disappear if you build using a separated
object tree (O=/path/to/object/tree) ?

However, given the contents of your patch, it seems only relevant for
separated object tree builds.

So... confused.

I'll investigate further once I've updated my cubox tree to 4.9.

-- 
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