ABACI reported the following bug by code static scanning: drivers/video/fbdev/arkfb.c:322:18: warning: unused function 'dac_read_reg'. In the following kernel version: [+]kernel: http://kernel.source.codeaurora.cn/pub/scm/linux/kernel/git/next/linux-next.git [+]branch: next-20220913 [+]commit: 044b771be9c5de9d817dfafb829d2f049c71c3b4
submitted to upstream: https://lore.kernel.org/all/d11a981a-1974-3092-5c81-e1f8c998c440@gmx.de/