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wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: 808eb958781e4ebb6e9c0962af2e856767e20f45 > commit: 236ee083f1b9128fd5bd266054c5b8868f803cee [1418/1780] fbdev: have CONFIG_FB_DEFERRED_IO depend on CONFIG_MMU > config: arm-kismet-CONFIG_FB_DEFERRED_IO-CONFIG_FB_DMAMEM_HELPERS_DEFERRED-0-0 (https://download.01.org/0day-ci/archive/20250207/202502070305.1rGTDnW0-lkp@intel.com/config) I'm not really sure what a kismet device is or how it's configured or where on earth this comes from? Could somebody on intel test side please clarify? Because you might just have a broken config here? Thanks! > reproduce: (https://download.01.org/0day-ci/archive/20250207/202502070305.1rGTDnW0-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/202502070305.1rGTDnW0-lkp@intel.com/ > > kismet warnings: (new ones prefixed by >>) > >> kismet: WARNING: unmet direct dependencies detected for FB_DEFERRED_IO when selected by FB_DMAMEM_HELPERS_DEFERRED > 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] This is a nommu device selecting a feature that absolutely requires an mmu. Something's broken here. I'm not sure pretending an mmu-dependent feature is does not rely on the mmu is the way to fix this. I'm VERY reluctant to add a stub for the function that explicitly relies on CONFIG_MMU because it'd be very misleading. > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki