drm: atomic helper: fix W=1 warnings

Few for_each macro set variables that are never used later which led
to generate unused-but-set-variable warnings.
Add (void)(foo) inside the macros to remove these warnings

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20191008124254.2144-1-benjamin.gaignard@st.com

diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index 927e1205d7aa4b7f4447f9be23d484bf988fbfc2..b6c73fd9f55a9ded1308aabe42eb228d2a21d26b 100644 (file)
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -693,6 +693,7 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
             (__i)++)                                                           \
                for_each_if ((__state)->connectors[__i].ptr &&                  \
                             ((connector) = (__state)->connectors[__i].ptr,     \
+                            (void)(connector) /* Only to avoid unused-but-set-variable warning */, \
                             (old_connector_state) = (__state)->connectors[__i].old_state,      \
                             (new_connector_state) = (__state)->connectors[__i].new_state, 1))
 
@@ -714,6 +715,7 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
             (__i)++)                                                           \
                for_each_if ((__state)->connectors[__i].ptr &&                  \
                             ((connector) = (__state)->connectors[__i].ptr,     \
+                            (void)(connector) /* Only to avoid unused-but-set-variable warning */, \
                             (old_connector_state) = (__state)->connectors[__i].old_state, 1))
 
 /**
@@ -734,7 +736,9 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
             (__i)++)                                                           \
                for_each_if ((__state)->connectors[__i].ptr &&                  \
                             ((connector) = (__state)->connectors[__i].ptr,     \
-                            (new_connector_state) = (__state)->connectors[__i].new_state, 1))
+                            (void)(connector) /* Only to avoid unused-but-set-variable warning */, \
+                            (new_connector_state) = (__state)->connectors[__i].new_state, \
+                            (void)(new_connector_state) /* Only to avoid unused-but-set-variable warning */, 1))
 
 /**
  * for_each_oldnew_crtc_in_state - iterate over all CRTCs in an atomic update
@@ -754,7 +758,9 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
             (__i)++)                                                   \
                for_each_if ((__state)->crtcs[__i].ptr &&               \
                             ((crtc) = (__state)->crtcs[__i].ptr,       \
+                             (void)(crtc) /* Only to avoid unused-but-set-variable warning */, \
                             (old_crtc_state) = (__state)->crtcs[__i].old_state, \
+                            (void)(old_crtc_state) /* Only to avoid unused-but-set-variable warning */, \
                             (new_crtc_state) = (__state)->crtcs[__i].new_state, 1))
 
 /**
@@ -793,7 +799,9 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
             (__i)++)                                                   \
                for_each_if ((__state)->crtcs[__i].ptr &&               \
                             ((crtc) = (__state)->crtcs[__i].ptr,       \
-                            (new_crtc_state) = (__state)->crtcs[__i].new_state, 1))
+                            (void)(crtc) /* Only to avoid unused-but-set-variable warning */, \
+                            (new_crtc_state) = (__state)->crtcs[__i].new_state, \
+                            (void)(new_crtc_state) /* Only to avoid unused-but-set-variable warning */, 1))
 
 /**
  * for_each_oldnew_plane_in_state - iterate over all planes in an atomic update
@@ -813,6 +821,7 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
             (__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,\
                              (new_plane_state) = (__state)->planes[__i].new_state, 1))
 
@@ -873,7 +882,9 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
             (__i)++)                                                   \
                for_each_if ((__state)->planes[__i].ptr &&              \
                             ((plane) = (__state)->planes[__i].ptr,     \
-                             (new_plane_state) = (__state)->planes[__i].new_state, 1))
+                             (void)(plane) /* Only to avoid unused-but-set-variable warning */, \
+                             (new_plane_state) = (__state)->planes[__i].new_state, \
+                             (void)(new_plane_state) /* Only to avoid unused-but-set-variable warning */, 1))
 
 /**
  * for_each_oldnew_private_obj_in_state - iterate over all private objects in an atomic update