2 * Sleepable Read-Copy Update mechanism for mutual exclusion
4 * This program 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * Copyright (C) IBM Corporation, 2006
20 * Author: Paul McKenney <paulmck@us.ibm.com>
22 * For detailed explanation of Read-Copy Update mechanism see -
23 * Documentation/RCU/ *.txt
30 struct srcu_struct_array
{
36 struct srcu_struct_array
*per_cpu_ref
;
40 #ifndef CONFIG_PREEMPT
41 #define srcu_barrier() barrier()
42 #else /* #ifndef CONFIG_PREEMPT */
43 #define srcu_barrier()
44 #endif /* #else #ifndef CONFIG_PREEMPT */
46 int init_srcu_struct(struct srcu_struct
*sp
);
47 void cleanup_srcu_struct(struct srcu_struct
*sp
);
48 int srcu_read_lock(struct srcu_struct
*sp
) __acquires(sp
);
49 void srcu_read_unlock(struct srcu_struct
*sp
, int idx
) __releases(sp
);
50 void synchronize_srcu(struct srcu_struct
*sp
);
51 long srcu_batches_completed(struct srcu_struct
*sp
);
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