[jlayton:dir-deleg 12/12] fs/namei.c:4103: warning: Function parameter or struct member 'delegated_inode' not described in 'vfs_mkdir'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git dir-deleg
head:   bc750b374b938c02896586cd7fa7d3b8f66b89d2
commit: bc750b374b938c02896586cd7fa7d3b8f66b89d2 [12/12] vfs: allow mkdir to wait for delegation break on parent
config: parisc-defconfig (https://download.01.org/0day-ci/archive/20240214/202402140044.JisAKFFn-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240214/202402140044.JisAKFFn-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/202402140044.JisAKFFn-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> fs/namei.c:4103: warning: Function parameter or struct member 'delegated_inode' not described in 'vfs_mkdir'


vim +4103 fs/namei.c

5590ff0d5528b6 Ulrich Drepper        2006-01-18  4085  
6521f891708292 Christian Brauner     2021-01-21  4086  /**
6521f891708292 Christian Brauner     2021-01-21  4087   * vfs_mkdir - create directory
abf08576afe315 Christian Brauner     2023-01-13  4088   * @idmap:	idmap of the mount the inode was found from
6521f891708292 Christian Brauner     2021-01-21  4089   * @dir:	inode of @dentry
6521f891708292 Christian Brauner     2021-01-21  4090   * @dentry:	pointer to dentry of the base directory
6521f891708292 Christian Brauner     2021-01-21  4091   * @mode:	mode of the new directory
6521f891708292 Christian Brauner     2021-01-21  4092   *
6521f891708292 Christian Brauner     2021-01-21  4093   * Create a directory.
6521f891708292 Christian Brauner     2021-01-21  4094   *
abf08576afe315 Christian Brauner     2023-01-13  4095   * If the inode has been found through an idmapped mount the idmap of
abf08576afe315 Christian Brauner     2023-01-13  4096   * the vfsmount must be passed through @idmap. This function will then take
abf08576afe315 Christian Brauner     2023-01-13  4097   * care to map the inode according to @idmap before checking permissions.
6521f891708292 Christian Brauner     2021-01-21  4098   * On non-idmapped mounts or if permission checking is to be performed on the
376870aa234439 Alexander Mikhalitsyn 2023-12-15  4099   * raw inode simply pass @nop_mnt_idmap.
6521f891708292 Christian Brauner     2021-01-21  4100   */
abf08576afe315 Christian Brauner     2023-01-13  4101  int vfs_mkdir(struct mnt_idmap *idmap, struct inode *dir,
bc750b374b938c Jeff Layton           2024-02-12  4102  	      struct dentry *dentry, umode_t mode, struct inode **delegated_inode)
^1da177e4c3f41 Linus Torvalds        2005-04-16 @4103  {
abf08576afe315 Christian Brauner     2023-01-13  4104  	int error;
8de52778798fe3 Al Viro               2012-02-06  4105  	unsigned max_links = dir->i_sb->s_max_links;
^1da177e4c3f41 Linus Torvalds        2005-04-16  4106  
4609e1f18e19c3 Christian Brauner     2023-01-13  4107  	error = may_create(idmap, dir, dentry);
^1da177e4c3f41 Linus Torvalds        2005-04-16  4108  	if (error)
^1da177e4c3f41 Linus Torvalds        2005-04-16  4109  		return error;
^1da177e4c3f41 Linus Torvalds        2005-04-16  4110  
acfa4380efe77e Al Viro               2008-12-04  4111  	if (!dir->i_op->mkdir)
^1da177e4c3f41 Linus Torvalds        2005-04-16  4112  		return -EPERM;
^1da177e4c3f41 Linus Torvalds        2005-04-16  4113  
9452e93e6dae86 Christian Brauner     2023-01-13  4114  	mode = vfs_prepare_mode(idmap, dir, mode, S_IRWXUGO | S_ISVTX, 0);
^1da177e4c3f41 Linus Torvalds        2005-04-16  4115  	error = security_inode_mkdir(dir, dentry, mode);
^1da177e4c3f41 Linus Torvalds        2005-04-16  4116  	if (error)
^1da177e4c3f41 Linus Torvalds        2005-04-16  4117  		return error;
^1da177e4c3f41 Linus Torvalds        2005-04-16  4118  
8de52778798fe3 Al Viro               2012-02-06  4119  	if (max_links && dir->i_nlink >= max_links)
8de52778798fe3 Al Viro               2012-02-06  4120  		return -EMLINK;
8de52778798fe3 Al Viro               2012-02-06  4121  
c54bd91e9eaba4 Christian Brauner     2023-01-13  4122  	error = dir->i_op->mkdir(idmap, dir, dentry, mode);
a74574aafea3a6 Stephen Smalley       2005-09-09  4123  	if (!error)
f38aa94224c551 Amy Griffis           2005-11-03  4124  		fsnotify_mkdir(dir, dentry);
^1da177e4c3f41 Linus Torvalds        2005-04-16  4125  	return error;
^1da177e4c3f41 Linus Torvalds        2005-04-16  4126  }
4d359507346a15 Al Viro               2014-03-14  4127  EXPORT_SYMBOL(vfs_mkdir);
^1da177e4c3f41 Linus Torvalds        2005-04-16  4128  

:::::: The code at line 4103 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>

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