linux-kernel - Re: [PATCH v3 10/28] sound: usb: Export USB SND APIs for modules

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Date:   Thu, 9 Mar 2023 07:29:18 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Wesley Cheng <quic_wcheng@...cinc.com>
Cc:     srinivas.kandagatla@...aro.org, mathias.nyman@...el.com,
        perex@...ex.cz, broonie@...nel.org, lgirdwood@...il.com,
        krzysztof.kozlowski+dt@...aro.org, agross@...nel.org,
        Thinh.Nguyen@...opsys.com, bgoswami@...cinc.com,
        andersson@...nel.org, robh+dt@...nel.org, tiwai@...e.com,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-usb@...r.kernel.org, quic_jackp@...cinc.com,
        quic_plai@...cinc.com
Subject: Re: [PATCH v3 10/28] sound: usb: Export USB SND APIs for modules

On Wed, Mar 08, 2023 at 03:57:33PM -0800, Wesley Cheng wrote:
> -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 name for the global symbol namespace, right?
It needs a "snd_" prefix at the very least, maybe even more.

>  
> -static const struct audioformat *
> +const struct audioformat *
>  find_substream_format(struct snd_usb_substream *subs,
>  		      const struct snd_pcm_hw_params *params)
>  {
> @@ -156,6 +157,7 @@ find_substream_format(struct snd_usb_substream *subs,
>  			   params_rate(params), params_channels(params),
>  			   true, subs);
>  }
> +EXPORT_SYMBOL_GPL(find_substream_format);

Same here.

>  
>  bool snd_usb_pcm_has_fixed_rate(struct snd_usb_substream *subs)
>  {
> @@ -446,7 +448,7 @@ int snd_usb_pcm_resume(struct snd_usb_stream *as)
>  	return 0;
>  }
>  
> -static void close_endpoints(struct snd_usb_audio *chip,
> +void close_endpoints(struct snd_usb_audio *chip,
>  			    struct snd_usb_substream *subs)
>  {
>  	if (subs->data_endpoint) {
> @@ -460,6 +462,7 @@ static void close_endpoints(struct snd_usb_audio *chip,
>  		subs->sync_endpoint = NULL;
>  	}
>  }
> +EXPORT_SYMBOL(close_endpoints);

Same here.

thanks,

greg k-h