drm/i915: Track purged state.
In order to correctly prevent the invalid reuse of a purged buffer, we
need to track such events and warn the user before something bad
happens.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index 607c9da..7e0cb1d 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -671,6 +671,7 @@
#define I915_MADV_WILLNEED 0
#define I915_MADV_DONTNEED 1
+#define __I915_MADV_PURGED 2 /* internal state */
struct drm_i915_gem_madvise {
/** Handle of the buffer to change the backing store advice */