Hi Lorenzo, FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant. tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable head: 8bf30f9d23eb5040d37e6e712789cee8e71e1577 commit: 85d65aec481df149bc5280cf1ad5f9b76f59f153 [146/165] fb_defio: do not use deprecated page->mapping, index fields config: arm-randconfig-003-20250208 (https://download.01.org/0day-ci/archive/20250208/202502081229.nVX901zo-lkp@xxxxxxxxx/config) compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project 6807164500e9920638e2ab0cdb4bf8321d24f8eb) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250208/202502081229.nVX901zo-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202502081229.nVX901zo-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): drivers/video/fbdev/core/fb_defio.c:136:34: error: too few arguments provided to function-like macro invocation 136 | fb_err("no mapping available\n"); | ^ include/linux/fb.h:887:9: note: macro 'fb_err' defined here 887 | #define fb_err(fb_info, fmt, ...) \ | ^ drivers/video/fbdev/core/fb_defio.c:136:3: error: use of undeclared identifier 'fb_err'; did you mean 'xa_err'? 136 | fb_err("no mapping available\n"); | ^~~~~~ | xa_err include/linux/xarray.h:223:19: note: 'xa_err' declared here 223 | static inline int xa_err(void *entry) | ^ drivers/video/fbdev/core/fb_defio.c:136:3: warning: expression result unused [-Wunused-value] 136 | fb_err("no mapping available\n"); | ^~~~~~ >> drivers/video/fbdev/core/fb_defio.c:272:3: error: call to undeclared function 'mapping_wrprotect_range'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 272 | mapping_wrprotect_range(fbdefio->mapping, pgoff, | ^ 1 warning and 3 errors generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for FB_DEFERRED_IO Depends on [n]: HAS_IOMEM [=y] && FB_CORE [=y] && MMU [=n] Selected by [y]: - FB_DMAMEM_HELPERS_DEFERRED [=y] && HAS_IOMEM [=y] && FB_CORE [=y] vim +/mapping_wrprotect_range +272 drivers/video/fbdev/core/fb_defio.c 258 259 /* workqueue callback */ 260 static void fb_deferred_io_work(struct work_struct *work) 261 { 262 struct fb_info *info = container_of(work, struct fb_info, deferred_work.work); 263 struct fb_deferred_io_pageref *pageref, *next; 264 struct fb_deferred_io *fbdefio = info->fbdefio; 265 266 /* here we wrprotect the page's mappings, then do all deferred IO. */ 267 mutex_lock(&fbdefio->lock); 268 list_for_each_entry(pageref, &fbdefio->pagereflist, list) { 269 struct page *page = pageref->page; 270 pgoff_t pgoff = pageref->offset >> PAGE_SHIFT; 271 > 272 mapping_wrprotect_range(fbdefio->mapping, pgoff, 273 page_to_pfn(page), 1); 274 } 275 276 /* driver's callback with pagereflist */ 277 fbdefio->deferred_io(info, &fbdefio->pagereflist); 278 279 /* clear the list */ 280 list_for_each_entry_safe(pageref, next, &fbdefio->pagereflist, list) 281 fb_deferred_io_pageref_put(pageref, info); 282 283 mutex_unlock(&fbdefio->lock); 284 } 285 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
