Re: [PATCH] jfs: validate active AG before updating db_active

[kernel test robot <lkp@intel.com>]

Hi Kyle,

kernel test robot noticed the following build errors:

[auto build test ERROR on brauner-vfs/vfs.all]
[also build test ERROR on linus/master kleikamp-shaggy/jfs-next v7.1-rc7 next-20260611]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Kyle-Zeng/jfs-validate-active-AG-before-updating-db_active/20260612-054255
base:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs.all
patch link:    https://lore.kernel.org/r/20260611212956.10206-1-kylebot%40openai.com
patch subject: [PATCH] jfs: validate active AG before updating db_active
config: s390-defconfig (https://download.01.org/0day-ci/archive/20260612/202606121834.MtsXleJq-lkp@intel.com/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/20260612/202606121834.MtsXleJq-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202606121834.MtsXleJq-lkp@intel.com/

All errors (new ones prefixed by >>):

>> fs/jfs/file.c:52:3: error: call to undeclared function 'jfs_error'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      52 |                 jfs_error(inode->i_sb,
         |                 ^
   fs/jfs/file.c:52:3: note: did you mean 'xas_error'?
   include/linux/xarray.h:1435:19: note: 'xas_error' declared here
    1435 | static inline int xas_error(const struct xa_state *xas)
         |                   ^
   1 error generated.


vim +/jfs_error +52 fs/jfs/file.c

    43	
    44	static int jfs_get_active_ag(struct inode *inode, int *agp)
    45	{
    46		struct jfs_inode_info *ji = JFS_IP(inode);
    47		struct jfs_sb_info *sbi = JFS_SBI(inode->i_sb);
    48		struct bmap *bmap = sbi->bmap;
    49		u64 ag = BLKTOAG(addressPXD(&ji->ixpxd), sbi);
    50	
    51		if (ag >= bmap->db_numag) {
  > 52			jfs_error(inode->i_sb,
    53				  "inode %lu has invalid active ag %llu\n",
    54				  inode->i_ino, (unsigned long long)ag);
    55			return -EIO;
    56		}
    57	
    58		*agp = ag;
    59		return 0;
    60	}
    61	

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