diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/srcu.h')
-rw-r--r-- | sys/compat/linuxkpi/common/include/linux/srcu.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/srcu.h b/sys/compat/linuxkpi/common/include/linux/srcu.h new file mode 100644 index 000000000000..1de7e8acedb8 --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/srcu.h @@ -0,0 +1,56 @@ +/*- + * 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 *); + +#define synchronize_srcu_expedited(srcu) do { \ + synchronize_srcu(srcu); \ +} while (0) + +#endif /* _LINUX_SRCU_H_ */ |