On Sep  1, 2026 Christian Brauner <[email protected]> wrote:
> 
> Convert to const struct mnt_idmap.
> 
> A mount's idmapping is immutable. The only thing that is allowed to be
> modified afterwards is the reference count and that is hidden behind
> mnt_idmap_get() and mnt_idmap_put(). Everything else only ever reads
> from the idmapping. This is the same model that struct cred uses and the
> idmapping is also rather sensitive.
> 
> So make the idmap argument const wherever we can. The conversion is done
> from the bottom up so callers can continue to pass a non-const pointer
> to a const parameter until the conversion is finished.
> 
> No functional changes.
> 
> Signed-off-by: Christian Brauner (Amutable) <[email protected]>
> Reviewed-by: Jan Kara <[email protected]>
> ---
>  Documentation/filesystems/locking.rst | 2 +-
>  Documentation/filesystems/vfs.rst     | 2 +-
>  fs/9p/vfs_inode.c                     | 2 +-
>  fs/9p/vfs_inode_dotl.c                | 4 ++--
>  fs/bad_inode.c                        | 2 +-
>  fs/btrfs/inode.c                      | 2 +-
>  fs/ceph/dir.c                         | 2 +-
>  fs/ecryptfs/inode.c                   | 2 +-
>  fs/ext2/namei.c                       | 2 +-
>  fs/ext4/namei.c                       | 2 +-
>  fs/f2fs/namei.c                       | 2 +-
>  fs/fuse/dir.c                         | 4 ++--
>  fs/gfs2/inode.c                       | 2 +-
>  fs/hfsplus/dir.c                      | 2 +-
>  fs/hostfs/hostfs_kern.c               | 2 +-
>  fs/hpfs/namei.c                       | 2 +-
>  fs/hugetlbfs/inode.c                  | 2 +-
>  fs/jffs2/dir.c                        | 4 ++--
>  fs/jfs/namei.c                        | 2 +-
>  fs/minix/namei.c                      | 2 +-
>  fs/nfs/dir.c                          | 2 +-
>  fs/nfs/internal.h                     | 2 +-
>  fs/nilfs2/namei.c                     | 2 +-
>  fs/ntfs/namei.c                       | 2 +-
>  fs/ntfs3/namei.c                      | 2 +-
>  fs/ocfs2/namei.c                      | 2 +-
>  fs/overlayfs/dir.c                    | 2 +-
>  fs/ramfs/inode.c                      | 2 +-
>  fs/smb/client/cifsfs.h                | 2 +-
>  fs/smb/client/dir.c                   | 2 +-
>  fs/ubifs/dir.c                        | 2 +-
>  fs/udf/namei.c                        | 2 +-
>  fs/ufs/namei.c                        | 2 +-
>  fs/xfs/xfs_iops.c                     | 2 +-
>  include/linux/fs.h                    | 2 +-
>  include/linux/lsm_hook_defs.h         | 2 +-
>  include/linux/security.h              | 4 ++--
>  mm/shmem.c                            | 4 ++--
>  security/integrity/evm/evm_main.c     | 2 +-
>  security/integrity/ima/ima_main.c     | 2 +-
>  security/security.c                   | 2 +-
>  41 files changed, 46 insertions(+), 46 deletions(-)

Acked-by: Paul Moore <[email protected]> (LSM)

--
paul-moore.com

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