[Intel-gfx] include/drm/i915_drm.h:96: possible bad bitmask ?

Daniel Vetter daniel at ffwll.ch
Mon Aug 8 09:40:27 UTC 2016


On Mon, Aug 08, 2016 at 10:31:32AM +0100, David Binderman wrote:
> Hello there,
> 
> Recent versions of gcc say this:
> 
> include/drm/i915_drm.h:96:34: warning: result of β€˜65535 << 20’
> requires 37 bits to represent, but β€˜int’ only has 32 bits
> [-Wshift-overflow=]
> 
> Source code is
> 
> #define   INTEL_BSM_MASK (0xFFFF << 20)
> 
> Maybe something like
> 
> #define   INTEL_BSM_MASK (0xFFFFUL<< 20)
> 
> might be better.

Yup. Care to bake this into a patch (with s-o-b and everything per
Documentation/SubmittingPatches) so I can apply it?
-Daniel

> 
> 
> Regards
> 
> David Binderman
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> Intel-gfx at lists.freedesktop.org
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch


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