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* [PATCH v2] ASoC: intel: Constify struct snd_soc_ops
@ 2024-05-13 17:57 Christophe JAILLET
  2024-05-20 21:33 ` Pierre-Louis Bossart
  0 siblings, 1 reply; 2+ messages in thread
From: Christophe JAILLET @ 2024-05-13 17:57 UTC (permalink / raw)
  To: Cezary Rojewski, Pierre-Louis Bossart, Liam Girdwood,
	Peter Ujfalusi, Bard Liao, Ranjani Sridharan, Kai Vehmanen,
	Mark Brown, Jaroslav Kysela, Takashi Iwai
  Cc: linux-kernel, kernel-janitors, Christophe JAILLET, alsa-devel,
	linux-sound

Constifying "struct snd_soc_ops" moves some data to a read-only section, so
increase overall security.

This structure is also part of scripts/const_structs.checkpatch.

As an example, on a x86_64, with allmodconfig:
Before:
   text	   data	    bss	    dec	    hex	filename
   6315	   3696	      0	  10011	   271b	sound/soc/intel/boards/ehl_rt5660.o

After:
   text	   data	    bss	    dec	    hex	filename
   6379	   3648	      0	  10027	   272b	sound/soc/intel/boards/ehl_rt5660.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
Compile tested only.

I hope that it can be applied with this single patch because all files are
in sound/soc/intel/boards/

Changes in v2:
  - Remove changes in sound/soc/intel/boards/sof_maxim_common.[ch].
    An even better solution has been applied in commit 2bb765f05391
    ("ASoC: Intel: maxim-common: change max98373 data to static")
  - synch with -next-20240513

v1: https://lore.kernel.org/all/242aef53b5b9533ae4cca78148622f5fe752b7ee.1715452901.git.christophe.jaillet@wanadoo.fr/
---
 sound/soc/intel/boards/bdw-rt5650.c                 | 2 +-
 sound/soc/intel/boards/ehl_rt5660.c                 | 2 +-
 sound/soc/intel/boards/kbl_da7219_max98357a.c       | 4 ++--
 sound/soc/intel/boards/kbl_da7219_max98927.c        | 6 +++---
 sound/soc/intel/boards/kbl_rt5660.c                 | 2 +-
 sound/soc/intel/boards/kbl_rt5663_max98927.c        | 8 ++++----
 sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c | 6 +++---
 sound/soc/intel/boards/sof_es8336.c                 | 2 +-
 sound/soc/intel/boards/sof_nau8825.c                | 2 +-
 sound/soc/intel/boards/sof_realtek_common.c         | 2 +-
 sound/soc/intel/boards/sof_rt5682.c                 | 2 +-
 sound/soc/intel/boards/sof_sdw_common.h             | 2 +-
 sound/soc/intel/boards/sof_sdw_rt_amp.c             | 2 +-
 sound/soc/intel/boards/sof_wm8804.c                 | 2 +-
 14 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/sound/soc/intel/boards/bdw-rt5650.c b/sound/soc/intel/boards/bdw-rt5650.c
index 3ae26f21458f..3c7cee03a02e 100644
--- a/sound/soc/intel/boards/bdw-rt5650.c
+++ b/sound/soc/intel/boards/bdw-rt5650.c
@@ -131,7 +131,7 @@ static int bdw_rt5650_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_ops bdw_rt5650_ops = {
+static const struct snd_soc_ops bdw_rt5650_ops = {
 	.hw_params = bdw_rt5650_hw_params,
 };
 
diff --git a/sound/soc/intel/boards/ehl_rt5660.c b/sound/soc/intel/boards/ehl_rt5660.c
index 686e60321224..26289e8fdd87 100644
--- a/sound/soc/intel/boards/ehl_rt5660.c
+++ b/sound/soc/intel/boards/ehl_rt5660.c
@@ -132,7 +132,7 @@ static int rt5660_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_ops rt5660_ops = {
+static const struct snd_soc_ops rt5660_ops = {
 	.hw_params = rt5660_hw_params,
 };
 
diff --git a/sound/soc/intel/boards/kbl_da7219_max98357a.c b/sound/soc/intel/boards/kbl_da7219_max98357a.c
index 9dbc15f9d1c9..154f6a74ed15 100644
--- a/sound/soc/intel/boards/kbl_da7219_max98357a.c
+++ b/sound/soc/intel/boards/kbl_da7219_max98357a.c
@@ -354,7 +354,7 @@ static int kabylake_dmic_startup(struct snd_pcm_substream *substream)
 			SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
 }
 
-static struct snd_soc_ops kabylake_dmic_ops = {
+static const struct snd_soc_ops kabylake_dmic_ops = {
 	.startup = kabylake_dmic_startup,
 };
 
@@ -388,7 +388,7 @@ static int kabylake_refcap_startup(struct snd_pcm_substream *substream)
 					&constraints_16000);
 }
 
-static struct snd_soc_ops skylake_refcap_ops = {
+static const struct snd_soc_ops skylake_refcap_ops = {
 	.startup = kabylake_refcap_startup,
 };
 
diff --git a/sound/soc/intel/boards/kbl_da7219_max98927.c b/sound/soc/intel/boards/kbl_da7219_max98927.c
index e662da5af83b..02ed77a07e23 100644
--- a/sound/soc/intel/boards/kbl_da7219_max98927.c
+++ b/sound/soc/intel/boards/kbl_da7219_max98927.c
@@ -288,7 +288,7 @@ static int kabylake_ssp0_trigger(struct snd_pcm_substream *substream, int cmd)
 	return 0;
 }
 
-static struct snd_soc_ops kabylake_ssp0_ops = {
+static const struct snd_soc_ops kabylake_ssp0_ops = {
 	.hw_params = kabylake_ssp0_hw_params,
 	.trigger = kabylake_ssp0_trigger,
 };
@@ -535,7 +535,7 @@ static int kabylake_dmic_startup(struct snd_pcm_substream *substream)
 			SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
 }
 
-static struct snd_soc_ops kabylake_dmic_ops = {
+static const struct snd_soc_ops kabylake_dmic_ops = {
 	.startup = kabylake_dmic_startup,
 };
 
@@ -569,7 +569,7 @@ static int kabylake_refcap_startup(struct snd_pcm_substream *substream)
 }
 
 
-static struct snd_soc_ops skylake_refcap_ops = {
+static const struct snd_soc_ops skylake_refcap_ops = {
 	.startup = kabylake_refcap_startup,
 };
 
diff --git a/sound/soc/intel/boards/kbl_rt5660.c b/sound/soc/intel/boards/kbl_rt5660.c
index 894d127c482a..66885cb36f24 100644
--- a/sound/soc/intel/boards/kbl_rt5660.c
+++ b/sound/soc/intel/boards/kbl_rt5660.c
@@ -277,7 +277,7 @@ static int kabylake_rt5660_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_ops kabylake_rt5660_ops = {
+static const struct snd_soc_ops kabylake_rt5660_ops = {
 	.hw_params = kabylake_rt5660_hw_params,
 };
 
diff --git a/sound/soc/intel/boards/kbl_rt5663_max98927.c b/sound/soc/intel/boards/kbl_rt5663_max98927.c
index e16c42e81eca..9da89436a917 100644
--- a/sound/soc/intel/boards/kbl_rt5663_max98927.c
+++ b/sound/soc/intel/boards/kbl_rt5663_max98927.c
@@ -489,7 +489,7 @@ static int kabylake_rt5663_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_ops kabylake_rt5663_ops = {
+static const struct snd_soc_ops kabylake_rt5663_ops = {
 	.hw_params = kabylake_rt5663_hw_params,
 };
 
@@ -539,7 +539,7 @@ static int kabylake_ssp0_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_ops kabylake_ssp0_ops = {
+static const struct snd_soc_ops kabylake_ssp0_ops = {
 	.hw_params = kabylake_ssp0_hw_params,
 };
 
@@ -575,7 +575,7 @@ static int kabylake_dmic_startup(struct snd_pcm_substream *substream)
 			SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
 }
 
-static struct snd_soc_ops kabylake_dmic_ops = {
+static const struct snd_soc_ops kabylake_dmic_ops = {
 	.startup = kabylake_dmic_startup,
 };
 
@@ -609,7 +609,7 @@ static int kabylake_refcap_startup(struct snd_pcm_substream *substream)
 				&constraints_16000);
 }
 
-static struct snd_soc_ops skylake_refcap_ops = {
+static const struct snd_soc_ops skylake_refcap_ops = {
 	.startup = kabylake_refcap_startup,
 };
 
diff --git a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
index a9501cd106ff..a32ce8f972f3 100644
--- a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
+++ b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
@@ -424,7 +424,7 @@ static int kabylake_rt5663_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_ops kabylake_rt5663_ops = {
+static const struct snd_soc_ops kabylake_rt5663_ops = {
 	.hw_params = kabylake_rt5663_hw_params,
 };
 
@@ -469,7 +469,7 @@ static int kabylake_ssp0_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_ops kabylake_ssp0_ops = {
+static const struct snd_soc_ops kabylake_ssp0_ops = {
 	.hw_params = kabylake_ssp0_hw_params,
 };
 
@@ -508,7 +508,7 @@ static int kabylake_dmic_startup(struct snd_pcm_substream *substream)
 			SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
 }
 
-static struct snd_soc_ops kabylake_dmic_ops = {
+static const struct snd_soc_ops kabylake_dmic_ops = {
 	.startup = kabylake_dmic_startup,
 };
 
diff --git a/sound/soc/intel/boards/sof_es8336.c b/sound/soc/intel/boards/sof_es8336.c
index c1fcc156a575..2a88efaa6d26 100644
--- a/sound/soc/intel/boards/sof_es8336.c
+++ b/sound/soc/intel/boards/sof_es8336.c
@@ -371,7 +371,7 @@ static int sof_es8336_hw_params(struct snd_pcm_substream *substream,
 }
 
 /* machine stream operations */
-static struct snd_soc_ops sof_es8336_ops = {
+static const struct snd_soc_ops sof_es8336_ops = {
 	.hw_params = sof_es8336_hw_params,
 	.trigger = sof_8336_trigger,
 };
diff --git a/sound/soc/intel/boards/sof_nau8825.c b/sound/soc/intel/boards/sof_nau8825.c
index c08b4eef0bcb..bfe17acbc161 100644
--- a/sound/soc/intel/boards/sof_nau8825.c
+++ b/sound/soc/intel/boards/sof_nau8825.c
@@ -115,7 +115,7 @@ static int sof_nau8825_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_ops sof_nau8825_ops = {
+static const struct snd_soc_ops sof_nau8825_ops = {
 	.hw_params = sof_nau8825_hw_params,
 };
 
diff --git a/sound/soc/intel/boards/sof_realtek_common.c b/sound/soc/intel/boards/sof_realtek_common.c
index dda346e0f737..f52e25083905 100644
--- a/sound/soc/intel/boards/sof_realtek_common.c
+++ b/sound/soc/intel/boards/sof_realtek_common.c
@@ -452,7 +452,7 @@ static int rt1015_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_ops rt1015_ops = {
+static const struct snd_soc_ops rt1015_ops = {
 	.hw_params = rt1015_hw_params,
 };
 
diff --git a/sound/soc/intel/boards/sof_rt5682.c b/sound/soc/intel/boards/sof_rt5682.c
index 6fc6eb0c5172..23a40b913290 100644
--- a/sound/soc/intel/boards/sof_rt5682.c
+++ b/sound/soc/intel/boards/sof_rt5682.c
@@ -397,7 +397,7 @@ static int sof_rt5682_hw_params(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_ops sof_rt5682_ops = {
+static const struct snd_soc_ops sof_rt5682_ops = {
 	.hw_params = sof_rt5682_hw_params,
 };
 
diff --git a/sound/soc/intel/boards/sof_sdw_common.h b/sound/soc/intel/boards/sof_sdw_common.h
index 3dfba6f6b95d..7dedac918065 100644
--- a/sound/soc/intel/boards/sof_sdw_common.h
+++ b/sound/soc/intel/boards/sof_sdw_common.h
@@ -169,7 +169,7 @@ int sof_sdw_rt_sdca_jack_init(struct snd_soc_card *card,
 int sof_sdw_rt_sdca_jack_exit(struct snd_soc_card *card, struct snd_soc_dai_link *dai_link);
 
 /* RT1308 I2S support */
-extern struct snd_soc_ops sof_sdw_rt1308_i2s_ops;
+extern const struct snd_soc_ops sof_sdw_rt1308_i2s_ops;
 
 /* generic amp support */
 int sof_sdw_rt_amp_init(struct snd_soc_card *card,
diff --git a/sound/soc/intel/boards/sof_sdw_rt_amp.c b/sound/soc/intel/boards/sof_sdw_rt_amp.c
index 797ea9ffa77a..d1c0f91ce589 100644
--- a/sound/soc/intel/boards/sof_sdw_rt_amp.c
+++ b/sound/soc/intel/boards/sof_sdw_rt_amp.c
@@ -233,7 +233,7 @@ static int rt1308_i2s_hw_params(struct snd_pcm_substream *substream,
 }
 
 /* machine stream operations */
-struct snd_soc_ops sof_sdw_rt1308_i2s_ops = {
+const struct snd_soc_ops sof_sdw_rt1308_i2s_ops = {
 	.hw_params = rt1308_i2s_hw_params,
 };
 
diff --git a/sound/soc/intel/boards/sof_wm8804.c b/sound/soc/intel/boards/sof_wm8804.c
index 4cb0d463bf40..b2d02cc92a6a 100644
--- a/sound/soc/intel/boards/sof_wm8804.c
+++ b/sound/soc/intel/boards/sof_wm8804.c
@@ -148,7 +148,7 @@ static int sof_wm8804_hw_params(struct snd_pcm_substream *substream,
 }
 
 /* machine stream operations */
-static struct snd_soc_ops sof_wm8804_ops = {
+static const struct snd_soc_ops sof_wm8804_ops = {
 	.hw_params = sof_wm8804_hw_params,
 };
 
-- 
2.45.0


^ permalink raw reply related	[flat|nested] 2+ messages in thread
* Re: [PATCH v2] ASoC: intel: Constify struct snd_soc_ops
  2024-05-13 17:57 [PATCH v2] ASoC: intel: Constify struct snd_soc_ops Christophe JAILLET
@ 2024-05-20 21:33 ` Pierre-Louis Bossart
  0 siblings, 0 replies; 2+ messages in thread
From: Pierre-Louis Bossart @ 2024-05-20 21:33 UTC (permalink / raw)
  To: Christophe JAILLET, Cezary Rojewski, Liam Girdwood,
	Peter Ujfalusi, Bard Liao, Ranjani Sridharan, Kai Vehmanen,
	Mark Brown, Jaroslav Kysela, Takashi Iwai
  Cc: linux-kernel, kernel-janitors, alsa-devel, linux-sound



On 5/13/24 12:57, Christophe JAILLET wrote:
> Constifying "struct snd_soc_ops" moves some data to a read-only section, so
> increase overall security.
> 
> This structure is also part of scripts/const_structs.checkpatch.
> 
> As an example, on a x86_64, with allmodconfig:
> Before:
>    text	   data	    bss	    dec	    hex	filename
>    6315	   3696	      0	  10011	   271b	sound/soc/intel/boards/ehl_rt5660.o
> 
> After:
>    text	   data	    bss	    dec	    hex	filename
>    6379	   3648	      0	  10027	   272b	sound/soc/intel/boards/ehl_rt5660.o
> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> Compile tested only.

We don't test all the boards in CI but I don't see any issues with
https://github.com/thesofproject/linux/pull/4993, so

Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

^ permalink raw reply	[flat|nested] 2+ messages in thread
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