On Thu, 13 Jul 2023 10:57:34 +0800 kernel test robot <lkp@xxxxxxxxx> wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable > head: e726c62e70a70ae5536caa0aa131c5dce5c6f764 > commit: 827057ff3ce7554741d431145c3b93f1a54125fc [93/173] s390: mm: convert to GENERIC_IOREMAP > config: s390-randconfig-r033-20230713 (https://download.01.org/0day-ci/archive/20230713/202307131033.JgvCSVz4-lkp@xxxxxxxxx/config) > compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) > reproduce: (https://download.01.org/0day-ci/archive/20230713/202307131033.JgvCSVz4-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/202307131033.JgvCSVz4-lkp@xxxxxxxxx/ > > All errors (new ones prefixed by >>): > > In file included from drivers/clk/clk-fixed-mmio.c:13: > In file included from include/linux/io.h:13: > In file included from arch/s390/include/asm/io.h:78: > include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] > 547 | val = __raw_readb(PCI_IOBASE + addr); > | ~~~~~~~~~~ ^ Thanks. When I tried that config I got In file included from ./include/linux/io.h:13, from drivers/clk/clk-fixed-mmio.c:13: drivers/clk/clk-fixed-mmio.c: In function 'fixed_mmio_clk_setup': ./arch/s390/include/asm/io.h:29:17: error: implicit declaration of function 'iounmap'; did you mean 'vunmap'? [-Werror=implicit-function-declaration] 29 | #define iounmap iounmap | ^~~~~~~ drivers/clk/clk-fixed-mmio.c:33:9: note: in expansion of macro 'iounmap' 33 | iounmap(base); | ^~~~~~~ I'll drop the series.
