[PATCH v2 07/10] mm/shmem_luo: Retrieve tmpfs files onto a tmpfs mount chosen by userspace

[kernel test robot]

Hi David,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 80cf37169daef112b6bea9ae7d9808355a045475]

url:    https://github.com/intel-lab-lkp/linux/commits/David-Matlack/liveupdate-Pass-user-argument-to-file-preserve-and-retrieve/20261022-225026
base:   80cf37169daef112b6bea9ae7d9808355a045475
patch link:    https://lore.kernel.org/r/20261022225035.377445-8-dmatlack%40google.com
patch subject: [PATCH v2 07/10] mm/shmem_luo: Retrieve tmpfs files onto a tmpfs mount chosen by userspace
config: m68k-allnoconfig (https://download.01.org/0day-ci/archive/20261027/202610271346.EnKIU96f-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 16.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261027/202610271346.EnKIU96f-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610271346.EnKIU96f-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/shmem.c:5867:6: warning: no previous prototype for 'shmem_inode_on_internal_mount' [-Wmissing-prototypes]
    5867 | bool shmem_inode_on_internal_mount(const struct inode *inode)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/shmem_inode_on_internal_mount +5867 mm/shmem.c

  5862	
  5863	/*
  5864	 * Whether @inode is on the internal shmem mount, which is used by
  5865	 * shmem_file_setup() and thus by memfd_create().
  5866	 */
> 5867	bool shmem_inode_on_internal_mount(const struct inode *inode)
  5868	{
  5869		return inode->i_sb == shm_mnt->mnt_sb;
  5870	}
  5871	

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