2 #include <linux/slab.h>
3 #include <linux/fs_pin.h>
7 static DEFINE_SPINLOCK(pin_lock);
9 void pin_remove(struct fs_pin *pin)
12 hlist_del(&pin->m_list);
13 hlist_del(&pin->s_list);
14 spin_unlock(&pin_lock);
17 void pin_insert(struct fs_pin *pin, struct vfsmount *m)
20 hlist_add_head(&pin->s_list, &m->mnt_sb->s_pins);
21 hlist_add_head(&pin->m_list, &real_mount(m)->mnt_pins);
22 spin_unlock(&pin_lock);
25 void mnt_pin_kill(struct mount *m)
31 p = ACCESS_ONCE(m->mnt_pins.first);
36 pin = hlist_entry(p, struct fs_pin, m_list);
37 if (!atomic_long_inc_not_zero(&pin->count)) {
47 void sb_pin_kill(struct super_block *sb)
53 p = ACCESS_ONCE(sb->s_pins.first);
58 pin = hlist_entry(p, struct fs_pin, s_list);
59 if (!atomic_long_inc_not_zero(&pin->count)) {