Re: [PATCH 1/5] tmpfs: Add casefold lookup support

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

Hi André,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-everything]
[also build test WARNING on linus/master v6.11-rc5 next-20240826]
[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/Andr-Almeida/tmpfs-Add-casefold-lookup-support/20240826-135457
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20240823173332.281211-2-andrealmeid%40igalia.com
patch subject: [PATCH 1/5] tmpfs: Add casefold lookup support
config: openrisc-allnoconfig (https://download.01.org/0day-ci/archive/20240827/202408270609.Nj6iM21E-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240827/202408270609.Nj6iM21E-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/202408270609.Nj6iM21E-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/shmem.c:4874:23: warning: 'shmem_lookup' defined but not used [-Wunused-function]
    4874 | static struct dentry *shmem_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
         |                       ^~~~~~~~~~~~


vim +/shmem_lookup +4874 mm/shmem.c

  4873	
> 4874	static struct dentry *shmem_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
  4875	{
  4876		if (dentry->d_name.len > NAME_MAX)
  4877			return ERR_PTR(-ENAMETOOLONG);
  4878	
  4879		/*
  4880		 * For now, VFS can't deal with case-insensitive negative dentries, so
  4881		 * we prevent them from being created
  4882		 */
  4883		if (IS_CASEFOLDED(dir))
  4884			return NULL;
  4885	
  4886		d_add(dentry, NULL);
  4887	
  4888		return NULL;
  4889	}
  4890	

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