Hi Edward, 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/Edward-Adam-Davis/mm-hugetlb-fix-null-ptr-defer-in-hugetlb_vma_lock_write/20231103-003152 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/tencent_164A247533766D667C3D873798968236C409%40qq.com patch subject: [PATCH] mm/hugetlb: fix null ptr defer in hugetlb_vma_lock_write config: loongarch-randconfig-002-20231103 (https://download.01.org/0day-ci/archive/20231103/202311030935.4AHgxdxU-lkp@xxxxxxxxx/config) compiler: loongarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231103/202311030935.4AHgxdxU-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/202311030935.4AHgxdxU-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from include/linux/migrate.h:8, from include/linux/balloon_compaction.h:41, from drivers/virtio/virtio_balloon.c:16: >> include/linux/hugetlb.h:182:12: warning: 'is_vma_resv_set' used but never defined 182 | static int is_vma_resv_set(struct vm_area_struct *vma, unsigned long flag); | ^~~~~~~~~~~~~~~ vim +/is_vma_resv_set +182 include/linux/hugetlb.h 179 180 extern int sysctl_hugetlb_shm_group; 181 extern struct list_head huge_boot_pages; > 182 static int is_vma_resv_set(struct vm_area_struct *vma, unsigned long flag); 183 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
