From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: Shengjiu Wang <shengjiu.wang@gmail.com>,
Xiubo Li <Xiubo.Lee@gmail.com>,
Fabio Estevam <festevam@gmail.com>,
Nicolin Chen <nicoleotsuka@gmail.com>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
Takashi Iwai <tiwai@suse.com>
Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
linux-sound@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH] ASoC: fsl_spdif: Constify some structures
Date: Mon, 3 Nov 2025 07:32:03 +0100 [thread overview]
Message-ID: <5fe08f028395a6c6f50d11eee8fdb4a90b1f68ab.1762151503.git.christophe.jaillet@wanadoo.fr> (raw)
'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@wanadoo.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
next reply other threads:[~2025-11-03 7:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-03 6:32 Christophe JAILLET [this message]
2025-11-04 13:24 ` [PATCH] ASoC: fsl_spdif: Constify some structures Mark Brown
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