ASoC: Make snd_soc_dapm_kcontrol_codec() inline

snd_soc_dapm_kcontrol_codec() is a extremely simple function and inlining it
typically results in less code than necessary for calling the non-inlined
version of the function.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-dapm.h

@@ -440,7 +440,6 @@ void dapm_mark_endpoints_dirty(struct snd_soc_card *card);
 int snd_soc_dapm_dai_get_connected_widgets(struct snd_soc_dai *dai, int stream,
 	struct snd_soc_dapm_widget_list **list);
 
-struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol);
 struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
 	struct snd_kcontrol *kcontrol);
 

include/sound/soc.h

@@ -1258,6 +1258,19 @@ static inline struct snd_soc_dapm_context *snd_soc_component_get_dapm(
 	return component->dapm_ptr;
 }
 
+/**
+ * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
+ * @kcontrol: The kcontrol
+ *
+ * This function must only be used on DAPM contexts that are known to be part of
+ * a CODEC (e.g. in a CODEC driver). Otherwise the behavior is undefined.
+ */
+static inline struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(
+	struct snd_kcontrol *kcontrol)
+{
+	return snd_soc_dapm_to_codec(snd_soc_dapm_kcontrol_dapm(kcontrol));
+}
+
 /* codec IO */
 unsigned int snd_soc_read(struct snd_soc_codec *codec, unsigned int reg);
 int snd_soc_write(struct snd_soc_codec *codec, unsigned int reg,

sound/soc/soc-dapm.c

@@ -473,16 +473,6 @@ struct snd_soc_dapm_context *snd_soc_dapm_kcontrol_dapm(
 }
 EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_dapm);
 
-/**
- * snd_soc_dapm_kcontrol_codec() - Returns the codec associated to a kcontrol
- * @kcontrol: The kcontrol
- */
-struct snd_soc_codec *snd_soc_dapm_kcontrol_codec(struct snd_kcontrol *kcontrol)
-{
-	return snd_soc_dapm_to_codec(snd_soc_dapm_kcontrol_dapm(kcontrol));
-}
-EXPORT_SYMBOL_GPL(snd_soc_dapm_kcontrol_codec);
-
 static void dapm_reset(struct snd_soc_card *card)
 {
 	struct snd_soc_dapm_widget *w;