Re: [PATCH] mm/hugetlb: fix null ptr defer in hugetlb_vma_lock_write

[kernel test robot]

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