[PATCH 1/2] drm/i915: introduce GEM_WARN_ON

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In a similar spirit to GEM_BUG_ON we now also have GEM_WARN_ON, with the
simple goal of expressing warnings which are truly insane, and so are
only really useful for CI where we have some abusive tests.

v2:
  - use BUILD_BUG_ON_INVALID for !DEBUG_GEM
  - clarify commit message

Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Suggested-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Matthew Auld <matthew.auld@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_gem.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem.h b/drivers/gpu/drm/i915/i915_gem.h
index 8801a14a78a2..a585d47c420a 100644
--- a/drivers/gpu/drm/i915/i915_gem.h
+++ b/drivers/gpu/drm/i915/i915_gem.h
@@ -27,8 +27,10 @@
 
 #ifdef CONFIG_DRM_I915_DEBUG_GEM
 #define GEM_BUG_ON(expr) BUG_ON(expr)
+#define GEM_WARN_ON(expr) WARN_ON(expr)
 #else
 #define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr)
+#define GEM_WARN_ON(expr) (BUILD_BUG_ON_INVALID(expr), 0)
 #endif
 
 #define I915_NUM_ENGINES 5
-- 
2.9.3

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