static struct workqueue_struct *afs_lock_manager;
 static DEFINE_MUTEX(afs_lock_manager_mutex);
 
-static struct file_lock_operations afs_lock_ops = {
+static const struct file_lock_operations afs_lock_ops = {
        .fl_copy_lock           = afs_fl_copy_lock,
        .fl_release_private     = afs_fl_release_private,
 };
 
        nlm_put_lockowner(fl->fl_u.nfs_fl.owner);
 }
 
-static struct file_lock_operations nlmclnt_lock_ops = {
+static const struct file_lock_operations nlmclnt_lock_ops = {
        .fl_copy_lock = nlmclnt_locks_copy_lock,
        .fl_release_private = nlmclnt_locks_release_private,
 };
 
        nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner);
 }
 
-static struct file_lock_operations nfs4_fl_lock_ops = {
+static const struct file_lock_operations nfs4_fl_lock_ops = {
        .fl_copy_lock = nfs4_fl_copy_lock,
        .fl_release_private = nfs4_fl_release_lock,
 };
 
        struct fasync_struct *  fl_fasync; /* for lease break notifications */
        unsigned long fl_break_time;    /* for nonblocking lease breaks */
 
-       struct file_lock_operations *fl_ops;    /* Callbacks for filesystems */
+       const struct file_lock_operations *fl_ops;      /* Callbacks for filesystems */
        struct lock_manager_operations *fl_lmops;       /* Callbacks for lockmanagers */
        union {
                struct nfs_lock_info    nfs_fl;