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>
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 361749e..eb16912 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -531,13 +531,6 @@ struct snd_pcm {
#endif
};
-struct snd_pcm_notify {
- int (*n_register) (struct snd_pcm * pcm);
- int (*n_disconnect) (struct snd_pcm * pcm);
- int (*n_unregister) (struct snd_pcm * pcm);
- struct list_head list;
-};
-
/*
* Registering
*/
@@ -552,7 +545,15 @@ int snd_pcm_new_internal(struct snd_card *card, const char *id, int device,
struct snd_pcm **rpcm);
int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count);
+#if IS_ENABLED(CONFIG_SND_PCM_OSS)
+struct snd_pcm_notify {
+ int (*n_register) (struct snd_pcm * pcm);
+ int (*n_disconnect) (struct snd_pcm * pcm);
+ int (*n_unregister) (struct snd_pcm * pcm);
+ struct list_head list;
+};
int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree);
+#endif
/*
* Native I/O