4017ad7bbc32 ("drm: Nerf drm_global_mutex BKL for good drivers")
591a2abf149f ("drm: Push drm_global_mutex locking in drm_open")
7e13ad896484 ("drm: Avoid drm_global_mutex for simple inc/dec of dev->open_count")
7a2c65dd32b1 ("drm: Release filp before global lock")