arch/m68k/68000/dragen2.c:38:13: warning: no previous prototype for 'init_dragen2'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   02d5e016800d082058b3d3b7c3ede136cdc6ddcb
commit: a734bbf694270dca8594a5c33375867dc31503f5 m68k: m68328: move platform code to separate files
date:   10 months ago
config: m68k-randconfig-r021-20211001 (attached as .config)
compiler: m68k-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a734bbf694270dca8594a5c33375867dc31503f5
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a734bbf694270dca8594a5c33375867dc31503f5
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=m68k 

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

All warnings (new ones prefixed by >>):

>> arch/m68k/68000/dragen2.c:38:13: warning: no previous prototype for 'init_dragen2' [-Wmissing-prototypes]
      38 | void __init init_dragen2(char *command, int size)
         |             ^~~~~~~~~~~~
   arch/m68k/68000/dragen2.c: In function 'init_dragen2':
   arch/m68k/68000/dragen2.c:73:23: error: 'screen_bits' undeclared (first use in this function)
      73 |         LSSA = (long) screen_bits;
         |                       ^~~~~~~~~~~
   arch/m68k/68000/dragen2.c:73:23: note: each undeclared identifier is reported only once for each function it appears in


vim +/init_dragen2 +38 arch/m68k/68000/dragen2.c

    37	
  > 38	void __init init_dragen2(char *command, int size)
    39	{
    40		mach_reset = dragen2_reset;
    41	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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