On Mon, Jul 24, 2023 at 07:33:56PM -0700, Wesley Cheng wrote: > --- a/sound/usb/pcm.c > +++ b/sound/usb/pcm.c > @@ -87,7 +87,7 @@ static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream > /* > * find a matching audio format > */ > -static const struct audioformat * > +const struct audioformat * > find_format(struct list_head *fmt_list_head, snd_pcm_format_t format, > unsigned int rate, unsigned int channels, bool strict_match, > struct snd_usb_substream *subs) > @@ -147,8 +147,9 @@ find_format(struct list_head *fmt_list_head, snd_pcm_format_t format, > } > return found; > } > +EXPORT_SYMBOL_GPL(find_format); This is a horrible symbol name for a global function, same for the other ones in this file. If you really want to export them, please put them in the proper "snd_" prefix namespace, or better yet, use a module namespace as well to ensure that we know who is using them. thanks, greg k-h