Hi John, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on next-20201217] [cannot apply to linux/master tegra-drm/drm/tegra/for-next linus/master v5.10 v5.10-rc7 v5.10-rc6 v5.10] [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] url: https://github.com/0day-ci/linux/commits/John-Stultz/dma-buf-heaps-Add-de... base: 90cc8cf2d1ab87d708ebc311ac104ccbbefad9fc config: s390-randconfig-c003-20201217 (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 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://github.com/0day-ci/linux/commit/51e229fb2d642c7881968d76a060cd237... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review John-Stultz/dma-buf-heaps-Add-deferred-free-helper-library-code/20201218-071112 git checkout 51e229fb2d642c7881968d76a060cd2373ad05d7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): s390-linux-ld: kernel/dma/coherent.o: in function `dma_init_coherent_memory': coherent.c:(.text+0x236): undefined reference to `memremap' s390-linux-ld: coherent.c:(.text+0x304): undefined reference to `memunmap' s390-linux-ld: kernel/dma/coherent.o: in function `dma_declare_coherent_memory': coherent.c:(.text+0x618): undefined reference to `memunmap' s390-linux-ld: drivers/irqchip/irq-al-fic.o: in function `al_fic_init_dt': irq-al-fic.c:(.init.text+0x6c): undefined reference to `of_iomap' s390-linux-ld: irq-al-fic.c:(.init.text+0x3c2): undefined reference to `iounmap' s390-linux-ld: drivers/dma-buf/heaps/system_heap.o: in function `system_heap_create': s390-linux-ld: drivers/dma-buf/heaps/system_heap.o: in function `system_heap_dma_buf_release': s390-linux-ld: drivers/dma-buf/heaps/system_heap.o: in function `system_heap_allocate': s390-linux-ld: drivers/input/serio/apbps2.o: in function `apbps2_of_probe': apbps2.c:(.text+0x25c): undefined reference to `devm_ioremap_resource' s390-linux-ld: drivers/input/keyboard/bcm-keypad.o: in function `bcm_kp_probe': bcm-keypad.c:(.text+0x4f8): undefined reference to `devm_ioremap_resource' s390-linux-ld: drivers/input/touchscreen/imx6ul_tsc.o: in function `imx6ul_tsc_probe': imx6ul_tsc.c:(.text+0x1f2): undefined reference to `devm_platform_ioremap_resource' s390-linux-ld: imx6ul_tsc.c:(.text+0x238): undefined reference to `devm_platform_ioremap_resource' s390-linux-ld: drivers/clocksource/timer-of.o: in function `timer_of_init': timer-of.c:(.init.text+0x76): undefined reference to `of_iomap' s390-linux-ld: timer-of.c:(.init.text+0x48c): undefined reference to `iounmap' s390-linux-ld: drivers/clocksource/timer-of.o: in function `timer_of_cleanup': timer-of.c:(.init.text+0x676): undefined reference to `iounmap' s390-linux-ld: drivers/clocksource/timer-microchip-pit64b.o: in function `mchp_pit64b_dt_init_timer': timer-microchip-pit64b.c:(.init.text+0x122): undefined reference to `of_iomap' s390-linux-ld: timer-microchip-pit64b.c:(.init.text+0x7c8): undefined reference to `iounmap' Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for PAGE_POOL Depends on NET Selected by - DMABUF_HEAPS_SYSTEM && DMABUF_HEAPS --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org