Hi Takashi, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v6.3-rc1 next-20230308] [cannot apply to drm-misc/drm-misc-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Takashi-Iwai/fbdev-Fix-incorrect-page-mapping-clearance-at-fb_deferred_io_release/20230308-143749 patch link: https://lore.kernel.org/r/20230308063628.15233-1-tiwai%40suse.de patch subject: [PATCH] fbdev: Fix incorrect page mapping clearance at fb_deferred_io_release() config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230308/202303081843.yyoyPjaN-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/fe94468e5ddd91231f1624559f861fb8110163c3 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Takashi-Iwai/fbdev-Fix-incorrect-page-mapping-clearance-at-fb_deferred_io_release/20230308-143749 git checkout fe94468e5ddd91231f1624559f861fb8110163c3 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 olddefconfig make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/video/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202303081843.yyoyPjaN-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): drivers/video/fbdev/core/fb_defio.c: In function 'fb_deferred_io_release_internal': >> drivers/video/fbdev/core/fb_defio.c:317:32: warning: unused variable 'fbdefio' [-Wunused-variable] 317 | struct fb_deferred_io *fbdefio = info->fbdefio; | ^~~~~~~ vim +/fbdefio +317 drivers/video/fbdev/core/fb_defio.c 0b78f8bcf4951af drivers/video/fbdev/core/fb_defio.c Matthew Wilcox 2021-06-01 314 fe94468e5ddd912 drivers/video/fbdev/core/fb_defio.c Takashi Iwai 2023-03-08 315 static void fb_deferred_io_release_internal(struct fb_info *info) 60b59beafba875a drivers/video/fb_defio.c Jaya Kumar 2007-05-08 316 { 60b59beafba875a drivers/video/fb_defio.c Jaya Kumar 2007-05-08 @317 struct fb_deferred_io *fbdefio = info->fbdefio; 0b78f8bcf4951af drivers/video/fbdev/core/fb_defio.c Matthew Wilcox 2021-06-01 318 struct page *page; 0b78f8bcf4951af drivers/video/fbdev/core/fb_defio.c Matthew Wilcox 2021-06-01 319 int i; 60b59beafba875a drivers/video/fb_defio.c Jaya Kumar 2007-05-08 320 181b74ef794e198 drivers/video/fb_defio.c Tejun Heo 2011-06-15 321 cancel_delayed_work_sync(&info->deferred_work); 0b78f8bcf4951af drivers/video/fbdev/core/fb_defio.c Matthew Wilcox 2021-06-01 322 0b78f8bcf4951af drivers/video/fbdev/core/fb_defio.c Matthew Wilcox 2021-06-01 323 /* clear out the mapping that we setup */ 0b78f8bcf4951af drivers/video/fbdev/core/fb_defio.c Matthew Wilcox 2021-06-01 324 for (i = 0 ; i < info->fix.smem_len; i += PAGE_SIZE) { 0b78f8bcf4951af drivers/video/fbdev/core/fb_defio.c Matthew Wilcox 2021-06-01 325 page = fb_deferred_io_page(info, i); 0b78f8bcf4951af drivers/video/fbdev/core/fb_defio.c Matthew Wilcox 2021-06-01 326 page->mapping = NULL; 0b78f8bcf4951af drivers/video/fbdev/core/fb_defio.c Matthew Wilcox 2021-06-01 327 } 3efc61d95259956 drivers/video/fbdev/core/fb_defio.c Takashi Iwai 2023-01-29 328 } fe94468e5ddd912 drivers/video/fbdev/core/fb_defio.c Takashi Iwai 2023-03-08 329 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
