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@@ -83,14 +83,14 @@ struct video_device
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#define to_video_device(cd) container_of(cd, struct video_device, dev)
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/* Version 2 functions */
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-extern int video_register_device(struct video_device *vfd, int type, int nr);
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-int video_register_device_index(struct video_device *vfd, int type, int nr,
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+int __must_check video_register_device(struct video_device *vfd, int type, int nr);
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+int __must_check video_register_device_index(struct video_device *vfd, int type, int nr,
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int index);
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void video_unregister_device(struct video_device *);
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/* helper functions to alloc / release struct video_device, the
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later can be used for video_device->release() */
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-struct video_device *video_device_alloc(void);
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+struct video_device * __must_check video_device_alloc(void);
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/* this release function frees the vfd pointer */
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void video_device_release(struct video_device *vfd);
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/* this release function does nothing, use when the video_device is a
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Hans Verkuil