linux-kernel - drivers/firmware/efi/sysfb_efi.c:70:6: warning: no previous prototype for 'efifb_setup_from

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Message-ID: <202111230807.Ileb58rB-lkp@intel.com>
Date:   Tue, 23 Nov 2021 08:21:27 +0800
From:   kernel test robot <lkp@...el.com>
To:     Javier Martinez Canillas <javierm@...hat.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>
Subject: drivers/firmware/efi/sysfb_efi.c:70:6: warning: no previous
 prototype for 'efifb_setup_from_dmi'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   136057256686de39cc3a07c2e39ef6bc43003ff6
commit: d391c58271072d0b0fad93c82018d495b2633448 drivers/firmware: move x86 Generic System Framebuffers support
date:   4 months ago
config: i386-randconfig-r036-20210927 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d391c58271072d0b0fad93c82018d495b2633448
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout d391c58271072d0b0fad93c82018d495b2633448
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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

All warnings (new ones prefixed by >>):

>> drivers/firmware/efi/sysfb_efi.c:70:6: warning: no previous prototype for 'efifb_setup_from_dmi' [-Wmissing-prototypes]
      70 | void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
         |      ^~~~~~~~~~~~~~~~~~~~
   drivers/firmware/efi/sysfb_efi.c:270:13: error: redefinition of 'sysfb_apply_efi_quirks'
     270 | __init void sysfb_apply_efi_quirks(void)
         |             ^~~~~~~~~~~~~~~~~~~~~~
   In file included from drivers/firmware/efi/sysfb_efi.c:24:
   include/linux/sysfb.h:65:20: note: previous definition of 'sysfb_apply_efi_quirks' was here
      65 | static inline void sysfb_apply_efi_quirks(void)
         |                    ^~~~~~~~~~~~~~~~~~~~~~


vim +/efifb_setup_from_dmi +70 drivers/firmware/efi/sysfb_efi.c

2995e506276bfd arch/x86/kernel/sysfb_efi.c David Herrmann 2013-08-02  69  
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25 @70  void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  71  {
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  72  	int i;
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  73  
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  74  	for (i = 0; i < M_UNKNOWN; i++) {
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  75  		if (efifb_dmi_list[i].base != 0 &&
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  76  		    !strcmp(opt, efifb_dmi_list[i].optname)) {
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  77  			si->lfb_base = efifb_dmi_list[i].base;
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  78  			si->lfb_linelength = efifb_dmi_list[i].stride;
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  79  			si->lfb_width = efifb_dmi_list[i].width;
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  80  			si->lfb_height = efifb_dmi_list[i].height;
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  81  		}
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  82  	}
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  83  }
21289ec02b41c4 arch/x86/kernel/sysfb_efi.c Ard Biesheuvel 2016-04-25  84  

:::::: The code at line 70 was first introduced by commit
:::::: 21289ec02b41c4b928a0b3de1778b325d714eea3 x86/efi/efifb: Move DMI based quirks handling out of generic code

:::::: TO: Ard Biesheuvel <ard.biesheuvel@...aro.org>
:::::: CC: Ingo Molnar <mingo@...nel.org>

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

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