drivers/video/fbdev/core/fbcon.c:106:16: sparse: sparse: symbol 'fbcon_registered_fb' was not declared. Should it be static?

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a9f94826e4bb6402e67f3eb849dee0811f1de6da
commit: efc3acbc105af79bce2ccf97a6159255b7cf6b38 fbcon: Maintain a private array of fb_info
date:   7 weeks ago
config: ia64-randconfig-s031-20220524 (https://download.01.org/0day-ci/archive/20220528/202205281235.rdumodzg-lkp@xxxxxxxxx/config)
compiler: ia64-linux-gcc (GCC) 11.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-14-g5a0004b5-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=efc3acbc105af79bce2ccf97a6159255b7cf6b38
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout efc3acbc105af79bce2ccf97a6159255b7cf6b38
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/video/fbdev/core/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)
>> drivers/video/fbdev/core/fbcon.c:106:16: sparse: sparse: symbol 'fbcon_registered_fb' was not declared. Should it be static?
>> drivers/video/fbdev/core/fbcon.c:107:5: sparse: sparse: symbol 'fbcon_num_registered_fb' was not declared. Should it be static?

vim +/fbcon_registered_fb +106 drivers/video/fbdev/core/fbcon.c

   105	
 > 106	struct fb_info *fbcon_registered_fb[FB_MAX];
 > 107	int fbcon_num_registered_fb;
   108	

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