linux-kernel - [kraxel:drm-misc-next 5/11] drivers/video/fbdev/aty/radeon_base.c:2246:73: warning: expression which evaluates to zero treated as a null pointer constant of type 'const char *'

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Date:   Wed, 20 Jul 2022 20:53:51 +0800
From:   kernel test robot <lkp@...el.com>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Javier Martinez Canillas <javierm@...hat.com>
Subject: [kraxel:drm-misc-next 5/11]
 drivers/video/fbdev/aty/radeon_base.c:2246:73: warning: expression which
 evaluates to zero treated as a null pointer constant of type 'const char *'

tree:   git://git.kraxel.org/linux drm-misc-next
head:   15fced5b051e6e22c228a521a5894b12c2ba0892
commit: 8d69d008f44cb96050c35e64fe940a22dd6b0113 [5/11] fbdev: Convert drivers to aperture helpers
config: powerpc-randconfig-r035-20220718 (https://download.01.org/0day-ci/archive/20220720/202207202040.jS1WcTzN-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project dd5635541cd7bbd62cd59b6694dfb759b6e9a0d8)
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
        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        git remote add kraxel git://git.kraxel.org/linux
        git fetch --no-tags kraxel drm-misc-next
        git checkout 8d69d008f44cb96050c35e64fe940a22dd6b0113
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/video/fbdev/aty/

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

All warnings (new ones prefixed by >>):

>> drivers/video/fbdev/aty/radeon_base.c:2246:73: warning: expression which evaluates to zero treated as a null pointer constant of type 'const char *' [-Wnon-literal-null-conversion]
           return aperture_remove_conflicting_devices(base, size, KBUILD_MODNAME, false);
                                                                                  ^~~~~
   1 warning generated.


vim +2246 drivers/video/fbdev/aty/radeon_base.c

  2240	
  2241	static int radeon_kick_out_firmware_fb(struct pci_dev *pdev)
  2242	{
  2243		resource_size_t base = pci_resource_start(pdev, 0);
  2244		resource_size_t size = pci_resource_len(pdev, 0);
  2245	
> 2246		return aperture_remove_conflicting_devices(base, size, KBUILD_MODNAME, false);
  2247	}
  2248	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp