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Date:   Tue, 29 Dec 2020 10:18:37 +0800
From:   kernel test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Greg Ungerer <gerg@...ux-m68k.org>
Subject: arch/m68k/68000/dragen2.c:73:16: error: 'screen_bits' undeclared

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dea8dcf2a9fa8cc540136a6cd885c3beece16ec3
commit: a734bbf694270dca8594a5c33375867dc31503f5 m68k: m68328: move platform code to separate files
date:   3 weeks ago
config: m68k-randconfig-r002-20201220 (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.3.0
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-9.3.0 make.cross ARCH=m68k 

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

All error/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:73:16: error: 'screen_bits' undeclared (first use in this function)
      73 |  LSSA = (long) screen_bits;
         |                ^~~~~~~~~~~
   arch/m68k/68000/dragen2.c:73:16: note: each undeclared identifier is reported only once for each function it appears in


vim +/screen_bits +73 arch/m68k/68000/dragen2.c

    37	
  > 38	void __init init_dragen2(char *command, int size)
    39	{
    40		mach_reset = dragen2_reset;
    41	
    42	#ifdef CONFIG_DIRECT_IO_ACCESS
    43		SCR = 0x10;					/* allow user access to internal registers */
    44	#endif
    45	
    46		/* CSGB Init */
    47		CSGBB = 0x4000;
    48		CSB = 0x1a1;
    49	
    50		/* CS8900 init */
    51		/* PK3: hardware sleep function pin, active low */
    52		PKSEL |= PK(3);				/* select pin as I/O */
    53		PKDIR |= PK(3);				/* select pin as output */
    54		PKDATA |= PK(3);			/* set pin high */
    55	
    56		/* PF5: hardware reset function pin, active high */
    57		PFSEL |= PF(5);				/* select pin as I/O */
    58		PFDIR |= PF(5);				/* select pin as output */
    59		PFDATA &= ~PF(5);			/* set pin low */
    60	
    61		/* cs8900 hardware reset */
    62		PFDATA |= PF(5);
    63		{ int i; for (i = 0; i < 32000; ++i); }
    64		PFDATA &= ~PF(5);
    65	
    66		/* INT1 enable (cs8900 IRQ) */
    67		PDPOL &= ~PD(1);			/* active high signal */
    68		PDIQEG &= ~PD(1);
    69		PDIRQEN |= PD(1);			/* IRQ enabled */
    70	
    71	#ifdef CONFIG_INIT_LCD
    72		/* initialize LCD controller */
  > 73		LSSA = (long) screen_bits;

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

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