[PATCH] dma-buf/fence: fix fence_is_later v2

[Daniel Vetter]

On Tue, Feb 23, 2016 at 11:04:57AM +0900, Michel Dänzer wrote:
> On 23.02.2016 04:32, Alex Deucher wrote:
> > From: Christian König <christian.koenig at amd.com>
> > 
> > A fence is never later than itself. This caused a bunch of overhead for AMDGPU.
> > 
> > v2: simplify check as suggested by Michel.
> > 
> > Signed-off-by: Christian König <christian.koenig at amd.com>
> > Reviewed-by: Michel Dänzer <michel.daenzer at amd.com>
> > Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
> > Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> > ---
> >  include/linux/fence.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/include/linux/fence.h b/include/linux/fence.h
> > index bb52201..5aa95eb 100644
> > --- a/include/linux/fence.h
> > +++ b/include/linux/fence.h
> > @@ -292,7 +292,7 @@ static inline bool fence_is_later(struct fence *f1, struct fence *f2)
> >  	if (WARN_ON(f1->context != f2->context))
> >  		return false;
> >  
> > -	return f1->seqno - f2->seqno < INT_MAX;
> > +	return (int)(f1->seqno - f2->seqno) > 0;
> >  }
> >  
> >  /**
> > 
> 
> According to
> 
>  scripts/get_maintainer.pl include/linux/fence.h
> 
> this patch should be sent to:
> 
> Sumit Semwal <sumit.semwal at linaro.org> (maintainer:DMA BUFFER SHARING FRAMEWORK)
> linux-media at vger.kernel.org (open list:DMA BUFFER SHARING FRAMEWORK)
> dri-devel at lists.freedesktop.org (open list:DMA BUFFER SHARING FRAMEWORK)
> linaro-mm-sig at lists.linaro.org (moderated list:DMA BUFFER SHARING FRAMEWORK)
> linux-kernel at vger.kernel.org (open list)
> 
> I'd add at least Sumit and the linaro-mm-sig list.

Plus Maarten Lankhorst please, and Gustavo Padovan maybe. Not sure Sumit
is still all that active on dma-buf/fence maintainership ...
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch