#define stream_to_hdac_ext_stream(s) \
        container_of(s, struct hdac_ext_stream, hstream)
 
-void snd_hdac_ext_stream_init(struct hdac_bus *bus,
-                             struct hdac_ext_stream *hext_stream, int idx,
-                             int direction, int tag);
 int snd_hdac_ext_stream_init_all(struct hdac_bus *bus, int start_idx,
                                 int num_stream, int dir);
 void snd_hdac_stream_free_all(struct hdac_bus *bus);
 
  * initialize the stream, if ppcap is enabled then init those and then
  * invoke hdac stream initialization routine
  */
-void snd_hdac_ext_stream_init(struct hdac_bus *bus,
-                             struct hdac_ext_stream *hext_stream,
-                             int idx, int direction, int tag)
+static void snd_hdac_ext_stream_init(struct hdac_bus *bus,
+                                    struct hdac_ext_stream *hext_stream,
+                                    int idx, int direction, int tag)
 {
        if (bus->ppcap) {
                hext_stream->pphc_addr = bus->ppcap + AZX_PPHC_BASE +
        hext_stream->decoupled = false;
        snd_hdac_stream_init(bus, &hext_stream->hstream, idx, direction, tag);
 }
-EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_init);
 
 /**
  * snd_hdac_ext_stream_init_all - create and initialize the stream objects