On Thu, Jun 16, 2022 at 04:58:08PM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: c6d7e3b385f19869ab96e9404c92ff1abc34f2c8 > commit: 20adc3e8f39ad4ce68795b6d3f9847f45ccd931a [3345/4062] highmem: Make kunmap_{local,atomic}() take pointers to const void > config: parisc-randconfig-r012-20220616 (https://download.01.org/0day-ci/archive/20220616/202206161652.aEEuklTk-lkp@xxxxxxxxx/config) > compiler: hppa-linux-gcc (GCC) 11.3.0 > 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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=20adc3e8f39ad4ce68795b6d3f9847f45ccd931a > git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > git fetch --no-tags linux-next master > git checkout 20adc3e8f39ad4ce68795b6d3f9847f45ccd931a > # save the config file > mkdir build_dir && cp config build_dir/.config > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=parisc SHELL=/bin/bash drivers/iio/light/ drivers/net/wwan/t7xx/ > > If you fix the issue, kindly add following tag where applicable > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All error/warnings (new ones prefixed by >>): > > In file included from include/linux/highmem.h:13, > from include/linux/bvec.h:10, > from include/linux/blk_types.h:10, > from include/linux/writeback.h:13, > from include/linux/memcontrol.h:22, > from include/linux/swap.h:9, > from include/linux/suspend.h:5, > from include/linux/regulator/consumer.h:35, > from include/linux/i2c.h:19, > from drivers/iio/light/adjd_s311.c:15: > include/linux/highmem-internal.h: In function '__kunmap_local': > >> include/linux/highmem-internal.h:203:31: warning: passing argument 1 of 'kunmap_flush_on_unmap' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] > 203 | kunmap_flush_on_unmap(addr); I think you missed adding const to kunmap_flush_on_unmap, in some configs it could be hidden behind an ifdef. The warning is on ARCH=parisc, https://elixir.bootlin.com/linux/latest/source/arch/parisc/include/asm/cacheflush.h#L78 #define ARCH_HAS_FLUSH_ON_KUNMAP static inline void kunmap_flush_on_unmap(void *addr) { flush_kernel_dcache_page_addr(addr); }
