Probably not even a fix for this warning:

  CC [M]  drivers/gpu/drm/drm_gem.o
drivers/gpu/drm/drm_gem.c: In function 'drm_gem_handle_delete':
drivers/gpu/drm/drm_gem.c:188:21: warning: variable 'dev' set but not used

 Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>

---
 drivers/gpu/drm/drm_gem.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index 33dad3f..e8180c9 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -206,6 +206,8 @@ drm_gem_handle_delete(struct drm_file *filp, u32 handle)
 		return -EINVAL;
 	}
 	dev = obj->dev;
+	if (!dev)
+		dev = 0;
 
 	/* Release reference and decrement refcount. */
 	idr_remove(&filp->object_idr, handle);
-- 
1.7.1.rc1.21.gf3bd6

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