61d82b0794
- Make sure to use READ_ONCE() when deferring variables. - Remove superfluous zero initializer. MFC after: 1 week Sponsored by: Mellanox Technologies
53 lines
1.9 KiB
C
53 lines
1.9 KiB
C
/*-
|
|
* Copyright (c) 2015-2020 Mellanox Technologies, Ltd.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice unmodified, this list of conditions, and the following
|
|
* disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _LINUX_SRCU_H_
|
|
#define _LINUX_SRCU_H_
|
|
|
|
#include <linux/compiler.h>
|
|
|
|
struct srcu_struct {
|
|
};
|
|
|
|
#define srcu_dereference(p, srcu) \
|
|
((__typeof(*(p)) *)READ_ONCE(p))
|
|
|
|
#define DEFINE_STATIC_SRCU(name) \
|
|
static struct srcu_struct name
|
|
|
|
/* prototypes */
|
|
|
|
extern int srcu_read_lock(struct srcu_struct *);
|
|
extern void srcu_read_unlock(struct srcu_struct *, int index);
|
|
extern void synchronize_srcu(struct srcu_struct *);
|
|
extern void srcu_barrier(struct srcu_struct *);
|
|
extern int init_srcu_struct(struct srcu_struct *);
|
|
extern void cleanup_srcu_struct(struct srcu_struct *);
|
|
|
|
#endif /* _LINUX_SRCU_H_ */
|