ASoC: soc-pcm: makes snd_soc_dpcm_can_be_xxx() local

Merge series from Kuninori Morimoto <[e-mail]>:

No driver is calling snd_soc_dpcm_can_be_xxx() functions. We don't need
to have EXPORT_SYMBOL_GPL() for them. This patch-set makes it static function.

include/sound/soc-dpcm.h

···
 #define for_each_dpcm_be_rollback(fe, stream, _dpcm)			\
 	list_for_each_entry_continue_reverse(_dpcm, &(fe)->dpcm[stream].be_clients, list_be)
 
-/* can this BE stop and free */
-int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
-		struct snd_soc_pcm_runtime *be, int stream);
-
-/* can this BE perform a hw_params() */
-int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
-		struct snd_soc_pcm_runtime *be, int stream);
-
-/* can this BE perform prepare */
-int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
-				 struct snd_soc_pcm_runtime *be, int stream);
-
-/* is the current PCM operation for this FE ? */
-int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream);
-
-/* is the current PCM operation for this BE ? */
-int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
-		struct snd_soc_pcm_runtime *be, int stream);
 
 /* get the substream for this BE */
 struct snd_pcm_substream *

sound/soc/soc-pcm.c

···
 	return ret;
 }
 
+/* is the current PCM operation for this FE ? */
+#if 0
+static int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
+{
+	if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
+		return 1;
+	return 0;
+}
+#endif
+
+/* is the current PCM operation for this BE ? */
+static int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
+			       struct snd_soc_pcm_runtime *be, int stream)
+{
+	if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
+	    ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
+	     be->dpcm[stream].runtime_update))
+		return 1;
+	return 0;
+}
+
+static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
+				    struct snd_soc_pcm_runtime *be,
+				    int stream,
+				    const enum snd_soc_dpcm_state *states,
+				    int num_states)
+{
+	struct snd_soc_dpcm *dpcm;
+	int state;
+	int ret = 1;
+	int i;
+
+	for_each_dpcm_fe(be, stream, dpcm) {
+
+		if (dpcm->fe == fe)
+			continue;
+
+		state = dpcm->fe->dpcm[stream].state;
+		for (i = 0; i < num_states; i++) {
+			if (state == states[i]) {
+				ret = 0;
+				break;
+			}
+		}
+	}
+
+	/* it's safe to do this BE DAI */
+	return ret;
+}
+
+/*
+ * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
+ * are not running, paused or suspended for the specified stream direction.
+ */
+static int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
+					 struct snd_soc_pcm_runtime *be, int stream)
+{
+	const enum snd_soc_dpcm_state state[] = {
+		SND_SOC_DPCM_STATE_START,
+		SND_SOC_DPCM_STATE_PAUSED,
+		SND_SOC_DPCM_STATE_SUSPEND,
+	};
+
+	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
+}
+
+/*
+ * We can only change hw params a BE DAI if any of it's FE are not prepared,
+ * running, paused or suspended for the specified stream direction.
+ */
+static int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
+				      struct snd_soc_pcm_runtime *be, int stream)
+{
+	const enum snd_soc_dpcm_state state[] = {
+		SND_SOC_DPCM_STATE_START,
+		SND_SOC_DPCM_STATE_PAUSED,
+		SND_SOC_DPCM_STATE_SUSPEND,
+		SND_SOC_DPCM_STATE_PREPARE,
+	};
+
+	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
+}
+
+/*
+ * We can only prepare a BE DAI if any of it's FE are not prepared,
+ * running or paused for the specified stream direction.
+ */
+static int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
+					struct snd_soc_pcm_runtime *be, int stream)
+{
+	const enum snd_soc_dpcm_state state[] = {
+		SND_SOC_DPCM_STATE_START,
+		SND_SOC_DPCM_STATE_PAUSED,
+		SND_SOC_DPCM_STATE_PREPARE,
+	};
+
+	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
+}
+
 #define DPCM_MAX_BE_USERS	8
 
 static inline const char *soc_cpu_dai_name(struct snd_soc_pcm_runtime *rtd)
···
 	return ret;
 }
 
-/* is the current PCM operation for this FE ? */
-int snd_soc_dpcm_fe_can_update(struct snd_soc_pcm_runtime *fe, int stream)
-{
-	if (fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE)
-		return 1;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_fe_can_update);
-
-/* is the current PCM operation for this BE ? */
-int snd_soc_dpcm_be_can_update(struct snd_soc_pcm_runtime *fe,
-		struct snd_soc_pcm_runtime *be, int stream)
-{
-	if ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_FE) ||
-	   ((fe->dpcm[stream].runtime_update == SND_SOC_DPCM_UPDATE_BE) &&
-		  be->dpcm[stream].runtime_update))
-		return 1;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_be_can_update);
-
 /* get the substream for this BE */
 struct snd_pcm_substream *
 	snd_soc_dpcm_get_substream(struct snd_soc_pcm_runtime *be, int stream)
···
 	return be->pcm->streams[stream].substream;
 }
 EXPORT_SYMBOL_GPL(snd_soc_dpcm_get_substream);
-
-static int snd_soc_dpcm_check_state(struct snd_soc_pcm_runtime *fe,
-				    struct snd_soc_pcm_runtime *be,
-				    int stream,
-				    const enum snd_soc_dpcm_state *states,
-				    int num_states)
-{
-	struct snd_soc_dpcm *dpcm;
-	int state;
-	int ret = 1;
-	int i;
-
-	for_each_dpcm_fe(be, stream, dpcm) {
-
-		if (dpcm->fe == fe)
-			continue;
-
-		state = dpcm->fe->dpcm[stream].state;
-		for (i = 0; i < num_states; i++) {
-			if (state == states[i]) {
-				ret = 0;
-				break;
-			}
-		}
-	}
-
-	/* it's safe to do this BE DAI */
-	return ret;
-}
-
-/*
- * We can only hw_free, stop, pause or suspend a BE DAI if any of it's FE
- * are not running, paused or suspended for the specified stream direction.
- */
-int snd_soc_dpcm_can_be_free_stop(struct snd_soc_pcm_runtime *fe,
-		struct snd_soc_pcm_runtime *be, int stream)
-{
-	const enum snd_soc_dpcm_state state[] = {
-		SND_SOC_DPCM_STATE_START,
-		SND_SOC_DPCM_STATE_PAUSED,
-		SND_SOC_DPCM_STATE_SUSPEND,
-	};
-
-	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
-}
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_free_stop);
-
-/*
- * We can only change hw params a BE DAI if any of it's FE are not prepared,
- * running, paused or suspended for the specified stream direction.
- */
-int snd_soc_dpcm_can_be_params(struct snd_soc_pcm_runtime *fe,
-		struct snd_soc_pcm_runtime *be, int stream)
-{
-	const enum snd_soc_dpcm_state state[] = {
-		SND_SOC_DPCM_STATE_START,
-		SND_SOC_DPCM_STATE_PAUSED,
-		SND_SOC_DPCM_STATE_SUSPEND,
-		SND_SOC_DPCM_STATE_PREPARE,
-	};
-
-	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
-}
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_params);
-
-/*
- * We can only prepare a BE DAI if any of it's FE are not prepared,
- * running or paused for the specified stream direction.
- */
-int snd_soc_dpcm_can_be_prepared(struct snd_soc_pcm_runtime *fe,
-				 struct snd_soc_pcm_runtime *be, int stream)
-{
-	const enum snd_soc_dpcm_state state[] = {
-		SND_SOC_DPCM_STATE_START,
-		SND_SOC_DPCM_STATE_PAUSED,
-		SND_SOC_DPCM_STATE_PREPARE,
-	};
-
-	return snd_soc_dpcm_check_state(fe, be, stream, state, ARRAY_SIZE(state));
-}
-EXPORT_SYMBOL_GPL(snd_soc_dpcm_can_be_prepared);