snd_oss_root
extern struct snd_info_entry *snd_oss_root;
snd_oss_root = create_subdir(THIS_MODULE, "oss");
if (!snd_oss_root)
struct snd_info_entry *snd_oss_root;
snd_oss_root);
entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);