The patch fixes this compiler's warning: drivers/video/fb.c:233:5: warning: no previous prototype for 'fb_set_shadowfb' [-Wmissing-prototypes] int fb_set_shadowfb(struct param_d *p, void *priv) ^ Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>