linux-kernel - [PATCH] drm/bridge: Constify struct i2c_device

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Message-ID: <bdba1f49b4b48e22628482b49ce81f8e1f0d97b1.1731445901.git.christophe.jaillet@wanadoo.fr>
Date: Tue, 12 Nov 2024 22:12:25 +0100
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Jagan Teki <jagan@...rulasolutions.com>,
	Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Jonas Karlman <jonas@...boo.se>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Douglas Anderson <dianders@...omium.org>
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH] drm/bridge: Constify struct i2c_device_id

'struct i2c_device_id' is not modified in these drivers.

Constifying this structure moves some data to a read-only section, so
increase overall security.

On a x86_64, with allmodconfig, as an example:
Before:
======
   text	   data	    bss	    dec	    hex	filename
  15566	    987	     32	  16585	   40c9	drivers/gpu/drm/bridge/chipone-icn6211.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
  15630	    923	     32	  16585	   40c9	drivers/gpu/drm/bridge/chipone-icn6211.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Compile tested-only.
---
 drivers/gpu/drm/bridge/chipone-icn6211.c   | 2 +-
 drivers/gpu/drm/bridge/lontium-lt9211.c    | 2 +-
 drivers/gpu/drm/bridge/lontium-lt9611.c    | 2 +-
 drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 2 +-
 drivers/gpu/drm/bridge/ti-sn65dsi83.c      | 2 +-
 drivers/gpu/drm/bridge/ti-sn65dsi86.c      | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/bridge/chipone-icn6211.c b/drivers/gpu/drm/bridge/chipone-icn6211.c
index 9eecac457dcf..d47703559b0d 100644
--- a/drivers/gpu/drm/bridge/chipone-icn6211.c
+++ b/drivers/gpu/drm/bridge/chipone-icn6211.c
@@ -785,7 +785,7 @@ static struct mipi_dsi_driver chipone_dsi_driver = {
 	},
 };
 
-static struct i2c_device_id chipone_i2c_id[] = {
+static const struct i2c_device_id chipone_i2c_id[] = {
 	{ "chipone,icn6211" },
 	{},
 };
diff --git a/drivers/gpu/drm/bridge/lontium-lt9211.c b/drivers/gpu/drm/bridge/lontium-lt9211.c
index c8881796fba4..999ddebb832d 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9211.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9211.c
@@ -773,7 +773,7 @@ static void lt9211_remove(struct i2c_client *client)
 	drm_bridge_remove(&ctx->bridge);
 }
 
-static struct i2c_device_id lt9211_id[] = {
+static const struct i2c_device_id lt9211_id[] = {
 	{ "lontium,lt9211" },
 	{},
 };
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c
index 1b31fdebe164..8f25b338a8d8 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -1235,7 +1235,7 @@ static void lt9611_remove(struct i2c_client *client)
 	of_node_put(lt9611->dsi0_node);
 }
 
-static struct i2c_device_id lt9611_id[] = {
+static const struct i2c_device_id lt9611_id[] = {
 	{ "lontium,lt9611", 0 },
 	{}
 };
diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
index 4d1d40e1f1b4..f89af8203c9d 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c
@@ -913,7 +913,7 @@ static void lt9611uxc_remove(struct i2c_client *client)
 	of_node_put(lt9611uxc->dsi0_node);
 }
 
-static struct i2c_device_id lt9611uxc_id[] = {
+static const struct i2c_device_id lt9611uxc_id[] = {
 	{ "lontium,lt9611uxc", 0 },
 	{ /* sentinel */ }
 };
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
index 57a7ed13f996..00d3bfa645f5 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c
@@ -732,7 +732,7 @@ static void sn65dsi83_remove(struct i2c_client *client)
 	drm_bridge_remove(&ctx->bridge);
 }
 
-static struct i2c_device_id sn65dsi83_id[] = {
+static const struct i2c_device_id sn65dsi83_id[] = {
 	{ "ti,sn65dsi83", MODEL_SN65DSI83 },
 	{ "ti,sn65dsi84", MODEL_SN65DSI84 },
 	{},
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 9e31f750fd88..ce4c026b064f 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -1970,7 +1970,7 @@ static int ti_sn65dsi86_probe(struct i2c_client *client)
 	return ti_sn65dsi86_add_aux_device(pdata, &pdata->aux_aux, "aux");
 }
 
-static struct i2c_device_id ti_sn65dsi86_id[] = {
+static const struct i2c_device_id ti_sn65dsi86_id[] = {
 	{ "ti,sn65dsi86", 0},
 	{},
 };
-- 
2.47.0