diff --git a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
index ccd0a953953d..a319905c2c72 100644
--- a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
+++ b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
@@ -3690,16 +3690,6 @@ struct _snd_pcm_runtime {
           </example>
         </para>
 
-        <para>
-          Here, the chip instance is retrieved via
-        <function>snd_kcontrol_chip()</function> macro.  This macro
-        just accesses to kcontrol-&gt;private_data. The
-        kcontrol-&gt;private_data field is 
-        given as the argument of <function>snd_ctl_new()</function>
-        (see the later subsection
-        <link linkend="control-interface-constructor"><citetitle>Constructor</citetitle></link>).
-        </para>
-
         <para>
 	The <structfield>value</structfield> field is depending on
         the type of control as well as on info callback.  For example,
diff --git a/include/sound/control.h b/include/sound/control.h
index 1de148b0fd94..f1361d6694ff 100644
--- a/include/sound/control.h
+++ b/include/sound/control.h
@@ -108,7 +108,6 @@ typedef int (*snd_kctl_ioctl_func_t) (struct snd_card * card,
 
 void snd_ctl_notify(struct snd_card * card, unsigned int mask, struct snd_ctl_elem_id * id);
 
-struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol * kcontrol, unsigned int access);
 struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new * kcontrolnew, void * private_data);
 void snd_ctl_free_one(struct snd_kcontrol * kcontrol);
 int snd_ctl_add(struct snd_card * card, struct snd_kcontrol * kcontrol);
diff --git a/sound/core/control.c b/sound/core/control.c
index 67f09b8f85e4..42bcf2794b28 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -183,7 +183,8 @@ EXPORT_SYMBOL(snd_ctl_notify);
  *
  * Returns the pointer of the new instance, or NULL on failure.
  */
-struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control, unsigned int access)
+static struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control,
+					unsigned int access)
 {
 	struct snd_kcontrol *kctl;
 	unsigned int idx;
@@ -201,8 +202,6 @@ struct snd_kcontrol *snd_ctl_new(struct snd_kcontrol *control, unsigned int acce
 	return kctl;
 }
 
-EXPORT_SYMBOL(snd_ctl_new);
-
 /**
  * snd_ctl_new1 - create a control instance from the template
  * @ncontrol: the initialization record