On 14 Nov 2025, at 21:33, Balbir Singh wrote: > On 11/15/25 13:15, kernel test robot wrote: >> Hi Balbir, >> >> kernel test robot noticed the following build warnings: >> >> [auto build test WARNING on akpm-mm/mm-everything] >> >> url: >> https://github.com/intel-lab-lkp/linux/commits/Balbir-Singh/mm-huge_memory-c-introduce-folio_split_unmapped/20251114-093541 >> base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git >> mm-everything >> patch link: >> https://lore.kernel.org/r/20251114012228.2634882-1-balbirs%40nvidia.com >> patch subject: [PATCH] mm/huge_memory.c: introduce folio_split_unmapped >> config: arm64-randconfig-002-20251115 >> (https://download.01.org/0day-ci/archive/20251115/[email protected]/config) >> compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project >> 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff) >> reproduce (this is a W=1 build): >> (https://download.01.org/0day-ci/archive/20251115/[email protected]/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 <[email protected]> >> | Closes: >> https://lore.kernel.org/oe-kbuild-all/[email protected]/ >> >> All warnings (new ones prefixed by >>): >> >>>> mm/huge_memory.c:3751:6: warning: variable 'nr_shmem_dropped' set but not >>>> used [-Wunused-but-set-variable] >> 3751 | int nr_shmem_dropped = 0; >> | ^ >> 1 warning generated. >> >> >> vim +/nr_shmem_dropped +3751 mm/huge_memory.c >> > > [...] > > Thanks for the report, I'll send an updated version after I investigate it
nr_shmem_dropped is updated in __folio_freeze_and_split_unmapped() but is used in its caller. It needs to be passed into __folio_freeze_and_split_unmapped(). -- Best Regards, Yan, Zi
