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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2017-2020 Junjiro R. Okajima
*
* This program, aufs is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* helpers for hlist_bl.h
*/
#ifndef __AUFS_HBL_H__
#define __AUFS_HBL_H__
#ifdef __KERNEL__
#include <linux/list_bl.h>
static inline void au_hbl_add(struct hlist_bl_node *node,
struct hlist_bl_head *hbl)
{
hlist_bl_lock(hbl);
hlist_bl_add_head(node, hbl);
hlist_bl_unlock(hbl);
}
static inline void au_hbl_del(struct hlist_bl_node *node,
struct hlist_bl_head *hbl)
{
hlist_bl_lock(hbl);
hlist_bl_del(node);
hlist_bl_unlock(hbl);
}
#define au_hbl_for_each(pos, head) \
for (pos = hlist_bl_first(head); \
pos; \
pos = pos->next)
static inline unsigned long au_hbl_count(struct hlist_bl_head *hbl)
{
unsigned long cnt;
struct hlist_bl_node *pos;
cnt = 0;
hlist_bl_lock(hbl);
au_hbl_for_each(pos, hbl)
cnt++;
hlist_bl_unlock(hbl);
return cnt;
}
#endif /* __KERNEL__ */
#endif /* __AUFS_HBL_H__ */
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