tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: df8d11fbcbb07177c2500e63d7f5a36063977596 commit: 3eb01faed2ebb254019a3bb72ce3bdf4d0a9be74 [1941/1941] mm/vmalloc: add vmap_range_noflush variant config: arm64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20251212/202512122201.xknqnJbC-lkp@i...) compiler: aarch64-linux-gcc (GCC) 15.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251212/202512122201.xknqnJbC-lkp@i...) 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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202512122201.xknqnJbC-lkp@intel.com/ All warnings (new ones prefixed by >>): mm/vmalloc.c: In function 'vmap_range_noflush':

...

mm/vmalloc.c:217:23: warning: variable 'start' set but not used [-Wunused-but-set-variable] 217 | unsigned long start; | ^~~~~ mm/vmalloc.c: At top level: mm/vmalloc.c:1417:6: warning: no previous prototype for 'set_iounmap_nonlazy' [-Wmissing-prototypes] 1417 | void set_iounmap_nonlazy(void) | ^~~~~~~~~~~~~~~~~~~ mm/vmalloc.c:3188: warning: Function parameter or member 'align' not described in 'pvm_determine_end_from_reverse'

vim +/start +217 mm/vmalloc.c 004cface9c1c0b Nicholas Piggin 2021-10-29 211 3eb01faed2ebb2 Nicholas Piggin 2021-10-29 212 static int vmap_range_noflush(unsigned long addr, unsigned long end, 004cface9c1c0b Nicholas Piggin 2021-10-29 213 phys_addr_t phys_addr, pgprot_t prot, 004cface9c1c0b Nicholas Piggin 2021-10-29 214 unsigned int max_page_shift) 004cface9c1c0b Nicholas Piggin 2021-10-29 215 { 004cface9c1c0b Nicholas Piggin 2021-10-29 216 pgd_t *pgd; 004cface9c1c0b Nicholas Piggin 2021-10-29 @217 unsigned long start; 004cface9c1c0b Nicholas Piggin 2021-10-29 218 unsigned long next; 004cface9c1c0b Nicholas Piggin 2021-10-29 219 int err; 004cface9c1c0b Nicholas Piggin 2021-10-29 220 004cface9c1c0b Nicholas Piggin 2021-10-29 221 might_sleep(); 004cface9c1c0b Nicholas Piggin 2021-10-29 222 BUG_ON(addr >= end); 004cface9c1c0b Nicholas Piggin 2021-10-29 223 004cface9c1c0b Nicholas Piggin 2021-10-29 224 start = addr; 004cface9c1c0b Nicholas Piggin 2021-10-29 225 pgd = pgd_offset_k(addr); 004cface9c1c0b Nicholas Piggin 2021-10-29 226 do { 004cface9c1c0b Nicholas Piggin 2021-10-29 227 next = pgd_addr_end(addr, end); 004cface9c1c0b Nicholas Piggin 2021-10-29 228 err = vmap_p4d_range(pgd, addr, next, phys_addr, prot, max_page_shift); 004cface9c1c0b Nicholas Piggin 2021-10-29 229 if (err) 004cface9c1c0b Nicholas Piggin 2021-10-29 230 break; 004cface9c1c0b Nicholas Piggin 2021-10-29 231 } while (pgd++, phys_addr += (next - addr), addr = next, addr != end); 004cface9c1c0b Nicholas Piggin 2021-10-29 232 3eb01faed2ebb2 Nicholas Piggin 2021-10-29 233 return err; 3eb01faed2ebb2 Nicholas Piggin 2021-10-29 234 } 3eb01faed2ebb2 Nicholas Piggin 2021-10-29 235 :::::: The code at line 217 was first introduced by commit :::::: 004cface9c1c0b6351473934a4ce452193e05b07 mm: Move vmap_range from mm/ioremap.c to mm/vmalloc.c :::::: TO: Nicholas Piggin <npiggin@gmail.com> :::::: CC: Yang Yingliang <yangyingliang@huawei.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki