include/drm/drm_atomic: Make use of 'new_crtc_state'

In the macro for_each_oldnew_crtc_in_state() 'crtc_state' is provided
as a container for state->crtcs[i].new_state, but is not utilised in
some use-cases, so we fake-use it instead.

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/imx/ipuv3-plane.c: In function ‘ipu_planes_assign_pre’:
 drivers/gpu/drm/imx/ipuv3-plane.c:746:42: warning: variable ‘crtc_state’ set but not used [-Wunused-but-set-variable]

Cc: Philipp Zabel <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Shawn Guo <[email protected]>
Cc: Sascha Hauer <[email protected]>
Cc: Pengutronix Kernel Team <[email protected]>
Cc: Fabio Estevam <[email protected]>
Cc: NXP Linux Team <[email protected]>
Cc: [email protected]
Signed-off-by: Lee Jones <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

1 files changed, 2 insertions, 1 deletions

diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
index dc5e0fbecc04..54e051a957df 100644
--- a/include/drm/drm_atomic.h
+++ b/include/drm/drm_atomic.h
@@ -783,7 +783,8 @@ void drm_state_dump(struct drm_device *dev, struct drm_printer *p);
 			      (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))
+			     (new_crtc_state) = (__state)->crtcs[__i].new_state, \
+			     (void)(new_crtc_state) /* Only to avoid unused-but-set-variable warning */, 1))
 
 /**
  * for_each_old_crtc_in_state - iterate over all CRTCs in an atomic update