Re: [PATCH] ALSA: pcm: constify action_ops structures

Takashi Sakamoto Sun, 29 Nov 2015 20:09:07 -0800

Hi,

On Nov 30 2015 00:36, Julia Lawall wrote:

The action_ops structures are never modified, so declare them as const.


Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <julia.law...@lip6.fr>

I think this approach is better to describe a part of design aboutactions for PCM substreams. It may help readers.


Reviewed-by: Takashi Sakamoto <o-taka...@sakamocchi.jp>
Tested-by: Takashi Sakamoto <o-taka...@sakamocchi.jp>

---
  sound/core/pcm_native.c |   26 +++++++++++++-------------
  1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index a8b27cd..fadd3eb 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -875,7 +875,7 @@ struct action_ops {
   *  Note: the stream state might be changed also on failure
   *  Note2: call with calling stream lock + link lock
   */
-static int snd_pcm_action_group(struct action_ops *ops,
+static int snd_pcm_action_group(const struct action_ops *ops,
                                struct snd_pcm_substream *substream,
                                int state, int do_lock)
  {
@@ -932,7 +932,7 @@ static int snd_pcm_action_group(struct action_ops *ops,
  /*
   *  Note: call with stream lock
   */
-static int snd_pcm_action_single(struct action_ops *ops,
+static int snd_pcm_action_single(const struct action_ops *ops,
                                 struct snd_pcm_substream *substream,
                                 int state)
  {
@@ -952,7 +952,7 @@ static int snd_pcm_action_single(struct action_ops *ops,
  /*
   *  Note: call with stream lock
   */
-static int snd_pcm_action(struct action_ops *ops,
+static int snd_pcm_action(const struct action_ops *ops,
                          struct snd_pcm_substream *substream,
                          int state)
  {
@@ -984,7 +984,7 @@ static int snd_pcm_action(struct action_ops *ops,
  /*
   *  Note: don't use any locks before
   */
-static int snd_pcm_action_lock_irq(struct action_ops *ops,
+static int snd_pcm_action_lock_irq(const struct action_ops *ops,
                                   struct snd_pcm_substream *substream,
                                   int state)
  {
@@ -998,7 +998,7 @@ static int snd_pcm_action_lock_irq(struct action_ops *ops,

  /*
   */
-static int snd_pcm_action_nonatomic(struct action_ops *ops,
+static int snd_pcm_action_nonatomic(const struct action_ops *ops,
                                    struct snd_pcm_substream *substream,
                                    int state)
  {
@@ -1056,7 +1056,7 @@ static void snd_pcm_post_start(struct snd_pcm_substream 
*substream, int state)
        snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTART);
  }

-static struct action_ops snd_pcm_action_start = {
+static const struct action_ops snd_pcm_action_start = {
        .pre_action = snd_pcm_pre_start,
        .do_action = snd_pcm_do_start,
        .undo_action = snd_pcm_undo_start,
@@ -1107,7 +1107,7 @@ static void snd_pcm_post_stop(struct snd_pcm_substream 
*substream, int state)
        wake_up(&runtime->tsleep);
  }

-static struct action_ops snd_pcm_action_stop = {
+static const struct action_ops snd_pcm_action_stop = {
        .pre_action = snd_pcm_pre_stop,
        .do_action = snd_pcm_do_stop,
        .post_action = snd_pcm_post_stop
@@ -1224,7 +1224,7 @@ static void snd_pcm_post_pause(struct snd_pcm_substream 
*substream, int push)
        }
  }

-static struct action_ops snd_pcm_action_pause = {
+static const struct action_ops snd_pcm_action_pause = {
        .pre_action = snd_pcm_pre_pause,
        .do_action = snd_pcm_do_pause,
        .undo_action = snd_pcm_undo_pause,
@@ -1273,7 +1273,7 @@ static void snd_pcm_post_suspend(struct snd_pcm_substream 
*substream, int state)
        wake_up(&runtime->tsleep);
  }

-static struct action_ops snd_pcm_action_suspend = {
+static const struct action_ops snd_pcm_action_suspend = {
        .pre_action = snd_pcm_pre_suspend,
        .do_action = snd_pcm_do_suspend,
        .post_action = snd_pcm_post_suspend
@@ -1375,7 +1375,7 @@ static void snd_pcm_post_resume(struct snd_pcm_substream 
*substream, int state)
        snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MRESUME);
  }

-static struct action_ops snd_pcm_action_resume = {
+static const struct action_ops snd_pcm_action_resume = {
        .pre_action = snd_pcm_pre_resume,
        .do_action = snd_pcm_do_resume,
        .undo_action = snd_pcm_undo_resume,
@@ -1478,7 +1478,7 @@ static void snd_pcm_post_reset(struct snd_pcm_substream 
*substream, int state)
                snd_pcm_playback_silence(substream, ULONG_MAX);
  }

-static struct action_ops snd_pcm_action_reset = {
+static const struct action_ops snd_pcm_action_reset = {
        .pre_action = snd_pcm_pre_reset,
        .do_action = snd_pcm_do_reset,
        .post_action = snd_pcm_post_reset
@@ -1522,7 +1522,7 @@ static void snd_pcm_post_prepare(struct snd_pcm_substream 
*substream, int state)
        snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
  }

-static struct action_ops snd_pcm_action_prepare = {
+static const struct action_ops snd_pcm_action_prepare = {
        .pre_action = snd_pcm_pre_prepare,
        .do_action = snd_pcm_do_prepare,
        .post_action = snd_pcm_post_prepare
@@ -1618,7 +1618,7 @@ static void snd_pcm_post_drain_init(struct 
snd_pcm_substream *substream, int sta
  {
  }

-static struct action_ops snd_pcm_action_drain_init = {
+static const struct action_ops snd_pcm_action_drain_init = {
        .pre_action = snd_pcm_pre_drain_init,
        .do_action = snd_pcm_do_drain_init,
        .post_action = snd_pcm_post_drain_init

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Re: [PATCH] ALSA: pcm: constify action_ops structures

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