linux-kernel - [PATCH] drm/atmel-hlcdc : constify drm_plane_helper_funcs and drm_plane

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Date:   Mon,  3 Jul 2017 21:53:54 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     boris.brezillon@...e-electrons.com, airlied@...ux.ie,
        daniel.vetter@...ll.ch
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/atmel-hlcdc : constify drm_plane_helper_funcs and drm_plane_funcs.

drm_plane_helper_funcs and drm_plane_funcsare not supposed to change
at runtime. All functions working with drm_plane_helper_funcs and
drm_plane_funcs work with const. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
   6072	    596	      0	   6668	   1a0c atmel_hlcdc_plane.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   6218	    436	      0	   6654	   19fe atmel_hlcdc_plane.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
index 29cc10d..ea72e1f 100644
--- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
+++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c
@@ -911,7 +911,7 @@ void atmel_hlcdc_plane_irq(struct atmel_hlcdc_plane *plane)
 			desc->name);
 }
 
-static struct drm_plane_helper_funcs atmel_hlcdc_layer_plane_helper_funcs = {
+static const struct drm_plane_helper_funcs atmel_hlcdc_layer_plane_helper_funcs = {
 	.atomic_check = atmel_hlcdc_plane_atomic_check,
 	.atomic_update = atmel_hlcdc_plane_atomic_update,
 	.atomic_disable = atmel_hlcdc_plane_atomic_disable,
@@ -1020,7 +1020,7 @@ static void atmel_hlcdc_plane_atomic_destroy_state(struct drm_plane *p,
 	kfree(state);
 }
 
-static struct drm_plane_funcs layer_plane_funcs = {
+static const struct drm_plane_funcs layer_plane_funcs = {
 	.update_plane = drm_atomic_helper_update_plane,
 	.disable_plane = drm_atomic_helper_disable_plane,
 	.set_property = drm_atomic_helper_plane_set_property,
-- 
2.7.4