drm/i915: allow GEM_BUG_ON expr checking with !DEBUG_GEM
Use BUILD_BUG_ON_INVALID(expr) in GEM_BUG_ON when building without DEBUG_GEM. This means the compiler can now check the validity of expr without generating any code, in turn preventing us from inadvertently breaking the build when DEBUG_GEM is not enabled. Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Matthew Auld <matthew.auld@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161202184750.3843-1-matthew.auld@intel.com Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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@ -28,7 +28,7 @@
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#ifdef CONFIG_DRM_I915_DEBUG_GEM
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#define GEM_BUG_ON(expr) BUG_ON(expr)
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#else
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#define GEM_BUG_ON(expr) do { } while (0)
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#define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr)
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#endif
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#define I915_NUM_ENGINES 5
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