tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 83e5775d7afda68f6d7576d21f7a080fbfeecc4f commit: d39c65bc7fcb1dad22dc1585fc669b5bfe5d3108 [14680/14811] cachestat: implement cachestat syscall config: s390-randconfig-s041-20230507 (https://download.01.org/0day-ci/archive/20230507/202305070840.X0G3ofjl-lkp@xxxxxxxxx/config) compiler: s390-linux-gcc (GCC) 12.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-39-gce1a6720-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=d39c65bc7fcb1dad22dc1585fc669b5bfe5d3108 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 d39c65bc7fcb1dad22dc1585fc669b5bfe5d3108 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=s390 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202305070840.X0G3ofjl-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) mm/filemap.c:1416:17: sparse: sparse: context imbalance in 'migration_entry_wait_on_locked' - unexpected unlock >> mm/filemap.c:4250:1: sparse: sparse: Using plain integer as NULL pointer >> mm/filemap.c:4250:1: sparse: sparse: Using plain integer as NULL pointer >> mm/filemap.c:4250:1: sparse: sparse: Using plain integer as NULL pointer >> mm/filemap.c:4250:1: sparse: sparse: Using plain integer as NULL pointer vim +4250 mm/filemap.c 4215 4216 /* 4217 * The cachestat(2) system call. 4218 * 4219 * cachestat() returns the page cache statistics of a file in the 4220 * bytes range specified by `off` and `len`: number of cached pages, 4221 * number of dirty pages, number of pages marked for writeback, 4222 * number of evicted pages, and number of recently evicted pages. 4223 * 4224 * An evicted page is a page that is previously in the page cache 4225 * but has been evicted since. A page is recently evicted if its last 4226 * eviction was recent enough that its reentry to the cache would 4227 * indicate that it is actively being used by the system, and that 4228 * there is memory pressure on the system. 4229 * 4230 * `off` and `len` must be non-negative integers. If `len` > 0, 4231 * the queried range is [`off`, `off` + `len`]. If `len` == 0, 4232 * we will query in the range from `off` to the end of the file. 4233 * 4234 * The `flags` argument is unused for now, but is included for future 4235 * extensibility. User should pass 0 (i.e no flag specified). 4236 * 4237 * Currently, hugetlbfs is not supported. 4238 * 4239 * Because the status of a page can change after cachestat() checks it 4240 * but before it returns to the application, the returned values may 4241 * contain stale information. 4242 * 4243 * return values: 4244 * zero - success 4245 * -EFAULT - cstat or cstat_range points to an illegal address 4246 * -EINVAL - invalid flags 4247 * -EBADF - invalid file descriptor 4248 * -EOPNOTSUPP - file descriptor is of a hugetlbfs file 4249 */ > 4250 SYSCALL_DEFINE4(cachestat, unsigned int, fd, -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
