struct mnt_namespace;
struct fs_struct;
struct user_namespace;
-struct vfsmount;
extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
struct user_namespace *, struct fs_struct *);
extern void put_mnt_ns(struct mnt_namespace *ns);
-extern int is_current_mnt_ns(struct vfsmount *mnt);
-
extern const struct file_operations proc_mounts_operations;
extern const struct file_operations proc_mountinfo_operations;
extern const struct file_operations proc_mountstats_operations;