[PATCH 11/12] drm/atomic: Add __must_check to drm_atomic_helper_swap_state.

[Maarten Lankhorst]

Now that all drivers check the return value, convert swap_state to
__must_check. This is done separately to force build warnings if we
missed a driver.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170711143314.2148-12-maarten.lankhorst@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
Reviewed-by: Sean Paul <seanpaul at chromium.org>
---
 include/drm/drm_atomic_helper.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index 547480692470..b464d4aeef82 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -86,7 +86,8 @@ void
 drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
 					 bool atomic);
 
-int drm_atomic_helper_swap_state(struct drm_atomic_state *state, bool stall);
+int __must_check drm_atomic_helper_swap_state(struct drm_atomic_state *state,
+					      bool stall);
 
 /* nonblocking commit helpers */
 int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
-- 
2.11.0