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wrote: > Hi Lorenzo, Thanks for the report! > > 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: sh-allmodconfig (https://download.01.org/0day-ci/archive/20250208/202502081235.v7ook2My-lkp@intel.com/config) > compiler: sh4-linux-gcc (GCC) 14.2.0 > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250208/202502081235.v7ook2My-lkp@intel.com/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 > | Closes: https://lore.kernel.org/oe-kbuild-all/202502081235.v7ook2My-lkp@intel.com/ > > All errors (new ones prefixed by >>): > > drivers/video/fbdev/core/fb_defio.c: In function 'fb_deferred_io_fault': > drivers/video/fbdev/core/fb_defio.c:136:48: error: macro "fb_err" requires 3 arguments, but only 1 given > 136 | fb_err("no mapping available\n"); > | ^ > In file included from drivers/video/fbdev/core/fb_defio.c:19: > 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:136:17: error: 'fb_err' undeclared (first use in this function); did you mean 'xa_err'? > 136 | fb_err("no mapping available\n"); My bad, I will fix this up. > | ^~~~~~ > | xa_err > drivers/video/fbdev/core/fb_defio.c:136:17: note: each undeclared identifier is reported only once for each function it appears in > drivers/video/fbdev/core/fb_defio.c: In function 'fb_deferred_io_work': > >> drivers/video/fbdev/core/fb_defio.c:272:17: error: implicit declaration of function 'mapping_wrprotect_range' [-Wimplicit-function-declaration] > 272 | mapping_wrprotect_range(fbdefio->mapping, pgoff, > | ^~~~~~~~~~~~~~~~~~~~~~~ > > Kconfig warnings: (for reference only) > WARNING: unmet direct dependencies detected for FB_DEFERRED_IO > Depends on [n]: HAS_IOMEM [=y] && FB_CORE [=m] && MMU [=n] > Selected by [m]: > - FB_SH_MOBILE_LCDC [=m] && FB [=m] && HAVE_CLK [=y] && HAS_IOMEM [=y] && (SUPERH [=y] || COMPILE_TEST [=y]) && FB_DEVICE [=y] && BACKLIGHT_CLASS_DEVICE [=m] > - FB_SYSMEM_HELPERS_DEFERRED [=y] && HAS_IOMEM [=y] && FB_CORE [=m] OK I think on reflection I probably have to propagate this requirement to all instances of "select FB_DEFERRED_IO" configs, I had assumed that Kconfig would figure this out but I guess not :) > > > 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 I will probably do a respin of the series to make all this easier.