Hi Mark-PK, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 97ee9d1c16963375eefdf964c429897d27e28956 commit: e61c451476e61450f6771ce03bbc01210a09be16 dma-mapping: Add dma_release_coherent_memory to DMA API date: 5 months ago config: s390-randconfig-r014-20221204 compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 6e4cea55f0d1104408b26ac574566a0e4de48036) 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 # install s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e61c451476e61450f6771ce03bbc01210a09be16 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout e61c451476e61450f6771ce03bbc01210a09be16 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): s390x-linux-ld: kernel/dma/coherent.o: in function `dma_declare_coherent_memory': coherent.c:(.text+0x44): undefined reference to `memremap' s390x-linux-ld: coherent.c:(.text+0x10a): undefined reference to `memunmap' s390x-linux-ld: coherent.c:(.text+0x17e): undefined reference to `memunmap' s390x-linux-ld: kernel/dma/coherent.o: in function `dma_release_coherent_memory': >> coherent.c:(.text+0x202): undefined reference to `memunmap' s390x-linux-ld: kernel/dma/coherent.o: in function `rmem_dma_device_init': coherent.c:(.text+0x7c0): undefined reference to `memremap' s390x-linux-ld: coherent.c:(.text+0x896): undefined reference to `memunmap' s390x-linux-ld: drivers/crypto/ccree/cc_driver.o: in function `ccree_probe': cc_driver.c:(.text+0x47a): undefined reference to `devm_ioremap_resource' s390x-linux-ld: drivers/crypto/ccree/cc_debugfs.o: in function `cc_debugfs_init': cc_debugfs.c:(.text+0x9a): undefined reference to `debugfs_create_regset32' s390x-linux-ld: cc_debugfs.c:(.text+0x15e): undefined reference to `debugfs_create_regset32' -- 0-DAY CI Kernel Test Service https://01.org/lkp