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Sat, 26 Mar 2022 17:02:26 +0000 Date: Sun, 27 Mar 2022 01:01:27 +0800 From: kernel test robot To: Yannick Fertre Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Eric Anholt , Neil Armstrong Subject: drivers/video/fbdev/core/fbmem.c:1496:15: warning: no previous declaration for 'get_fb_unmapped_area' Message-ID: <202203270028.vzpaWr13-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Yannick, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 52d543b5497cf31d6baeb0bcfe5a5474c3238578 commit: b759012c5fa761ee08998c80fc4ad6343c258487 drm/stm: Add STM32 LTDC driver date: 4 years, 11 months ago config: arm-randconfig-r023-20220326 (https://download.01.org/0day-ci/archive/20220327/202203270028.vzpaWr13-lkp@intel.com/config) compiler: arm-linux-gnueabi-gcc (GCC) 7.5.0 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=b759012c5fa761ee08998c80fc4ad6343c258487 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout b759012c5fa761ee08998c80fc4ad6343c258487 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash M=drivers/video/fbdev/core If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> drivers/video/fbdev/core/fbmem.c:1496:15: warning: no previous declaration for 'get_fb_unmapped_area' [-Wmissing-declarations] unsigned long get_fb_unmapped_area(struct file *filp, ^~~~~~~~~~~~~~~~~~~~ drivers/video/fbdev/core/fbmem.c:719:37: warning: 'fb_proc_fops' defined but not used [-Wunused-const-variable=] static const struct file_operations fb_proc_fops = { ^~~~~~~~~~~~ vim +/get_fb_unmapped_area +1496 drivers/video/fbdev/core/fbmem.c ^1da177e4c3f415 drivers/video/fbmem.c Linus Torvalds 2005-04-16 1494 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1495 #ifdef CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 @1496 unsigned long get_fb_unmapped_area(struct file *filp, 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1497 unsigned long addr, unsigned long len, 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1498 unsigned long pgoff, unsigned long flags) 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1499 { 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1500 struct fb_info * const info = filp->private_data; 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1501 unsigned long fb_size = PAGE_ALIGN(info->fix.smem_len); 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1502 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1503 if (pgoff > fb_size || len > fb_size - pgoff) 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1504 return -EINVAL; 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1505 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1506 return (unsigned long)info->screen_base + pgoff; 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1507 } 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1508 #endif 82f42e4cc164ed4 drivers/video/fbdev/core/fbmem.c Benjamin Gaignard 2017-01-04 1509 :::::: The code at line 1496 was first introduced by commit :::::: 82f42e4cc164ed486c9e2b1b74e65b176830d947 fbmem: add a default get_fb_unmapped_area function :::::: TO: Benjamin Gaignard :::::: CC: Daniel Vetter -- 0-DAY CI Kernel Test Service https://01.org/lkp