linux-kernel - [PATCH] ASoC: fsl_spdif: Constify some structures

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <5fe08f028395a6c6f50d11eee8fdb4a90b1f68ab.1762151503.git.christophe.jaillet@wanadoo.fr>
Date: Mon,  3 Nov 2025 07:32:03 +0100
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Shengjiu Wang <shengjiu.wang@...il.com>,
	Xiubo Li <Xiubo.Lee@...il.com>,
	Fabio Estevam <festevam@...il.com>,
	Nicolin Chen <nicoleotsuka@...il.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	linux-sound@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] ASoC: fsl_spdif: Constify some structures

'struct fsl_spdif_soc_data' and 'struct snd_kcontrol_new' are not modified
in this driver.

Constifying these structures moves some data to a read-only section, so
increases overall security, especially when the structure holds some
function pointers.

On a x86_64, with allmodconfig:
Before:
======
   text	   data	    bss	    dec	    hex	filename
  53548	  25576	    128	  79252	  13594	sound/soc/fsl/fsl_spdif.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
  54828	  24296	    128	  79252	  13594	sound/soc/fsl/fsl_spdif.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 sound/soc/fsl/fsl_spdif.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index ee946e0d3f49..1b9be85b34c2 100644
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -148,7 +148,7 @@ struct fsl_spdif_priv {
 	struct clk *pll11k_clk;
 };
 
-static struct fsl_spdif_soc_data fsl_spdif_vf610 = {
+static const struct fsl_spdif_soc_data fsl_spdif_vf610 = {
 	.imx = false,
 	.shared_root_clock = false,
 	.raw_capture_mode = false,
@@ -158,7 +158,7 @@ static struct fsl_spdif_soc_data fsl_spdif_vf610 = {
 	.tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
 };
 
-static struct fsl_spdif_soc_data fsl_spdif_imx35 = {
+static const struct fsl_spdif_soc_data fsl_spdif_imx35 = {
 	.imx = true,
 	.shared_root_clock = false,
 	.raw_capture_mode = false,
@@ -168,7 +168,7 @@ static struct fsl_spdif_soc_data fsl_spdif_imx35 = {
 	.tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
 };
 
-static struct fsl_spdif_soc_data fsl_spdif_imx6sx = {
+static const struct fsl_spdif_soc_data fsl_spdif_imx6sx = {
 	.imx = true,
 	.shared_root_clock = true,
 	.raw_capture_mode = false,
@@ -179,7 +179,7 @@ static struct fsl_spdif_soc_data fsl_spdif_imx6sx = {
 
 };
 
-static struct fsl_spdif_soc_data fsl_spdif_imx8qm = {
+static const struct fsl_spdif_soc_data fsl_spdif_imx8qm = {
 	.imx = true,
 	.shared_root_clock = true,
 	.raw_capture_mode = false,
@@ -189,7 +189,7 @@ static struct fsl_spdif_soc_data fsl_spdif_imx8qm = {
 	.tx_formats = SNDRV_PCM_FMTBIT_S24_LE,  /* Applied for EDMA */
 };
 
-static struct fsl_spdif_soc_data fsl_spdif_imx8mm = {
+static const struct fsl_spdif_soc_data fsl_spdif_imx8mm = {
 	.imx = true,
 	.shared_root_clock = false,
 	.raw_capture_mode = true,
@@ -199,7 +199,7 @@ static struct fsl_spdif_soc_data fsl_spdif_imx8mm = {
 	.tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
 };
 
-static struct fsl_spdif_soc_data fsl_spdif_imx8ulp = {
+static const struct fsl_spdif_soc_data fsl_spdif_imx8ulp = {
 	.imx = true,
 	.shared_root_clock = true,
 	.raw_capture_mode = false,
@@ -1146,7 +1146,7 @@ static int fsl_spdif_usync_put(struct snd_kcontrol *kcontrol,
 }
 
 /* FSL SPDIF IEC958 controller defines */
-static struct snd_kcontrol_new fsl_spdif_ctrls[] = {
+static const struct snd_kcontrol_new fsl_spdif_ctrls[] = {
 	/* Status cchanel controller */
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
@@ -1233,7 +1233,7 @@ static struct snd_kcontrol_new fsl_spdif_ctrls[] = {
 	},
 };
 
-static struct snd_kcontrol_new fsl_spdif_ctrls_rcm[] = {
+static const struct snd_kcontrol_new fsl_spdif_ctrls_rcm[] = {
 	{
 		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
 		.name = "IEC958 Raw Capture Mode",
-- 
2.51.1