2 * Copyright (C) 2005-2013 Junjiro R. Okajima
4 * This program, aufs is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * simple list protected by a spinlock
23 #ifndef __AUFS_SPL_H__
24 #define __AUFS_SPL_H__
30 struct list_head head;
33 static inline void au_spl_init(struct au_splhead *spl)
35 spin_lock_init(&spl->spin);
36 INIT_LIST_HEAD(&spl->head);
39 static inline void au_spl_add(struct list_head *list, struct au_splhead *spl)
41 spin_lock(&spl->spin);
42 list_add(list, &spl->head);
43 spin_unlock(&spl->spin);
46 static inline void au_spl_del(struct list_head *list, struct au_splhead *spl)
48 spin_lock(&spl->spin);
50 spin_unlock(&spl->spin);
53 static inline void au_spl_del_rcu(struct list_head *list,
54 struct au_splhead *spl)
56 spin_lock(&spl->spin);
58 spin_unlock(&spl->spin);
61 /* ---------------------------------------------------------------------- */
65 struct hlist_head head;
68 static inline void au_sphl_init(struct au_sphlhead *sphl)
70 spin_lock_init(&sphl->spin);
71 INIT_HLIST_HEAD(&sphl->head);
74 static inline void au_sphl_add(struct hlist_node *hlist,
75 struct au_sphlhead *sphl)
77 spin_lock(&sphl->spin);
78 hlist_add_head(hlist, &sphl->head);
79 spin_unlock(&sphl->spin);
82 static inline void au_sphl_del(struct hlist_node *hlist,
83 struct au_sphlhead *sphl)
85 spin_lock(&sphl->spin);
87 spin_unlock(&sphl->spin);
90 static inline void au_sphl_del_rcu(struct hlist_node *hlist,
91 struct au_sphlhead *sphl)
93 spin_lock(&sphl->spin);
95 spin_unlock(&sphl->spin);
98 static inline unsigned long au_sphl_count(struct au_sphlhead *sphl)
101 struct hlist_node *pos;
104 spin_lock(&sphl->spin);
105 hlist_for_each(pos, &sphl->head)
107 spin_unlock(&sphl->spin);
111 #endif /* __KERNEL__ */
112 #endif /* __AUFS_SPL_H__ */