add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/sound/usb/endpoint.h
..
..
@@ -28,6 +28,7 @@
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 void snd_usb_endpoint_free(struct snd_usb_endpoint *ep);
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 int snd_usb_endpoint_implicit_feedback_sink(struct snd_usb_endpoint *ep);
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+int snd_usb_endpoint_slave_next_packet_size(struct snd_usb_endpoint *ep);
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 int snd_usb_endpoint_next_packet_size(struct snd_usb_endpoint *ep);
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 void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep,