[PATCH 02/29] drm/atomic: Fix unused but set warning in for_each_old_plane_in_state

[Maxime Ripard]

The for_each_old_plane_in_state() macro triggers a compiler warning if
the plane parameter passed to it isn't used in the code block.

Add a similar workaround than in most other macros.

Signed-off-by: Maxime Ripard <mrip...@kernel.org>
---
 include/drm/drm_atomic.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 
38636a593c9d98cadda85ccd67326cb152f0dd27..689a29bdeb4a06672ab6fffecb513d58ff6e07f9
 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -1053,11 +1053,13 @@ void drm_state_dump(struct drm_device *dev, struct 
drm_printer *p);
        for ((__i) = 0;                                                 \
             (__i) < (__state)->dev->mode_config.num_total_plane;       \
             (__i)++)                                                   \
                for_each_if ((__state)->planes[__i].ptr &&              \
                             ((plane) = (__state)->planes[__i].ptr,     \
+                             (void)(plane) /* Only to avoid 
unused-but-set-variable warning */, \
                              (old_plane_state) = 
(__state)->planes[__i].old_state, 1))
+
 /**
  * for_each_new_plane_in_state - iterate over all planes in an atomic update
  * @__state: &struct drm_atomic_state pointer
  * @plane: &struct drm_plane iteration cursor
  * @new_plane_state: &struct drm_plane_state iteration cursor for the new state

-- 
2.50.1