--- zzzz-none-000/linux-4.4.271/include/sound/info.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/sound/info.h	2023-04-19 10:22:30.000000000 +0000
@@ -161,7 +161,9 @@
 }
 
 int snd_info_check_reserved_words(const char *str);
-
+struct snd_info_entry *snd_info_create_subdir(struct module *mod,
+					      const char *name,
+					      struct snd_info_entry *parent);
 #else
 
 #define snd_seq_root NULL
@@ -190,7 +192,9 @@
 					 void *private_data,
 					 void (*read)(struct snd_info_entry *, struct snd_info_buffer *)) {}
 static inline int snd_info_check_reserved_words(const char *str) { return 1; }
-
+static inline struct snd_info_entry *snd_info_create_subdir(
+				struct module *mod, const char *name,
+				struct snd_info_entry *parent) { return NULL; }
 #endif
 
 /*