ALSA: pcm: Build pcm notifier code conditionally
The PCM notifier code is used only by OSS emulation layer, so we can build it conditionally for reducing the size. Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -531,13 +531,6 @@ struct snd_pcm {
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#endif
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};
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struct snd_pcm_notify {
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int (*n_register) (struct snd_pcm * pcm);
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int (*n_disconnect) (struct snd_pcm * pcm);
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int (*n_unregister) (struct snd_pcm * pcm);
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struct list_head list;
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};
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/*
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* Registering
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*/
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@ -552,7 +545,15 @@ int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
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struct snd_pcm **rpcm);
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int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
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#if IS_ENABLED(CONFIG_SND_PCM_OSS)
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struct snd_pcm_notify {
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int (*n_register) (struct snd_pcm * pcm);
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int (*n_disconnect) (struct snd_pcm * pcm);
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int (*n_unregister) (struct snd_pcm * pcm);
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struct list_head list;
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};
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int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
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#endif
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/*
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* Native I/O
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@ -36,8 +36,10 @@ MODULE_DESCRIPTION("Midlevel PCM code for ALSA.");
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MODULE_LICENSE("GPL");
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static LIST_HEAD(snd_pcm_devices);
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static LIST_HEAD(snd_pcm_notify_list);
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static DEFINE_MUTEX(register_mutex);
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#if IS_ENABLED(CONFIG_SND_PCM_OSS)
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static LIST_HEAD(snd_pcm_notify_list);
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#endif
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static int snd_pcm_free(struct snd_pcm *pcm);
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static int snd_pcm_dev_free(struct snd_device *device);
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@ -884,16 +886,23 @@ static void snd_pcm_free_stream(struct snd_pcm_str * pstr)
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put_device(&pstr->dev);
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}
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#if IS_ENABLED(CONFIG_SND_PCM_OSS)
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#define pcm_call_notify(pcm, call) \
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do { \
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struct snd_pcm_notify *_notify; \
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list_for_each_entry(_notify, &snd_pcm_notify_list, list) \
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_notify->call(pcm); \
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} while (0)
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#else
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#define pcm_call_notify(pcm, call) /* NOP */
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#endif
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static int snd_pcm_free(struct snd_pcm *pcm)
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{
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struct snd_pcm_notify *notify;
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if (!pcm)
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return 0;
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if (!pcm->internal) {
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list_for_each_entry(notify, &snd_pcm_notify_list, list)
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notify->n_unregister(pcm);
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}
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if (!pcm->internal)
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pcm_call_notify(pcm, n_unregister);
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if (pcm->private_free)
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pcm->private_free(pcm);
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snd_pcm_lib_preallocate_free_for_all(pcm);
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@ -1069,7 +1078,6 @@ static int snd_pcm_dev_register(struct snd_device *device)
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{
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int cidx, err;
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struct snd_pcm_substream *substream;
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struct snd_pcm_notify *notify;
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struct snd_pcm *pcm;
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if (snd_BUG_ON(!device || !device->device_data))
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@ -1107,8 +1115,7 @@ static int snd_pcm_dev_register(struct snd_device *device)
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snd_pcm_timer_init(substream);
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}
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list_for_each_entry(notify, &snd_pcm_notify_list, list)
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notify->n_register(pcm);
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pcm_call_notify(pcm, n_register);
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unlock:
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mutex_unlock(®ister_mutex);
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@ -1118,7 +1125,6 @@ static int snd_pcm_dev_register(struct snd_device *device)
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static int snd_pcm_dev_disconnect(struct snd_device *device)
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{
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struct snd_pcm *pcm = device->device_data;
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struct snd_pcm_notify *notify;
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struct snd_pcm_substream *substream;
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int cidx;
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@ -1138,8 +1144,7 @@ static int snd_pcm_dev_disconnect(struct snd_device *device)
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}
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}
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if (!pcm->internal) {
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list_for_each_entry(notify, &snd_pcm_notify_list, list)
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notify->n_disconnect(pcm);
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pcm_call_notify(pcm, n_disconnect);
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}
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for (cidx = 0; cidx < 2; cidx++) {
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if (!pcm->internal)
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@ -1151,6 +1156,7 @@ static int snd_pcm_dev_disconnect(struct snd_device *device)
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return 0;
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}
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#if IS_ENABLED(CONFIG_SND_PCM_OSS)
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/**
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* snd_pcm_notify - Add/remove the notify list
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* @notify: PCM notify list
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@ -1183,6 +1189,7 @@ int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree)
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return 0;
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}
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EXPORT_SYMBOL(snd_pcm_notify);
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#endif /* CONFIG_SND_PCM_OSS */
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#ifdef CONFIG_SND_PROC_FS
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/*
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