Re: [PATCH] xfs: use inode_set_cached_link()

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

Hi Mateusz,

kernel test robot noticed the following build errors:

[auto build test ERROR on xfs-linux/for-next]
[also build test ERROR on linus/master v6.12 next-20241125]
[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/Mateusz-Guzik/xfs-use-inode_set_cached_link/20241125-115441
base:   https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git for-next
patch link:    https://lore.kernel.org/r/20241123075105.1082661-1-mjguzik%40gmail.com
patch subject: [PATCH] xfs: use inode_set_cached_link()
config: i386-buildonly-randconfig-003-20241125 (https://download.01.org/0day-ci/archive/20241125/202411252143.IFCZKd2V-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241125/202411252143.IFCZKd2V-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/202411252143.IFCZKd2V-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from fs/xfs/xfs_symlink.c:7:
   In file included from fs/xfs/xfs.h:26:
   In file included from fs/xfs/xfs_linux.h:25:
   In file included from include/linux/mm.h:2213:
   include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     504 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     505 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     511 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     512 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     524 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     525 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> fs/xfs/xfs_symlink.c:52:2: error: call to undeclared function 'inode_set_cached_link'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      52 |         inode_set_cached_link(inode, ip->i_df.if_data, pathlen);
         |         ^
   4 warnings and 1 error generated.


vim +/inode_set_cached_link +52 fs/xfs/xfs_symlink.c

    30	
    31	void
    32	xfs_setup_cached_symlink(
    33		struct xfs_inode	*ip)
    34	{
    35		struct inode		*inode = &ip->i_vnode;
    36		xfs_fsize_t		pathlen;
    37	
    38		/*
    39		 * If we have the symlink readily accessible let the VFS know where to
    40		 * find it. This avoids calls to xfs_readlink().
    41		 */
    42		pathlen = ip->i_disk_size;
    43		if (pathlen <= 0 || pathlen > XFS_SYMLINK_MAXLEN)
    44			return;
    45	
    46		if (ip->i_df.if_format != XFS_DINODE_FMT_LOCAL)
    47			return;
    48	
    49		if (XFS_IS_CORRUPT(ip->i_mount, !ip->i_df.if_data))
    50			return;
    51	
  > 52		inode_set_cached_link(inode, ip->i_df.if_data, pathlen);
    53	}
    54	

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