#include <linux/fs.h>
struct fs_pin {
struct hlist_node s_list;
struct hlist_node m_list;
void (*kill)(struct fs_pin *);
};
void pin_remove(struct fs_pin *);
void pin_insert_group(struct fs_pin *, struct vfsmount *, struct hlist_head *);
void pin_insert(struct fs_pin *, struct vfsmount *);