--- zzzz-none-000/linux-3.10.107/sound/oss/pas2.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/sound/oss/pas2.h	2021-02-04 17:41:59.000000000 +0000
@@ -15,3 +15,6 @@
 /*	From pas_midi.c */
 void pas_midi_init(void);
 void pas_midi_interrupt(void);
+
+/*	From pas2_mixer.c*/
+void mix_write(unsigned char data, int ioaddr);