diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/rwlock.h')
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/rwlock.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/rwlock.h b/sys/compat/linuxkpi/common/include/linux/rwlock.h new file mode 100644 index 000000000000..621afb1e954b --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/rwlock.h @@ -0,0 +1,68 @@ +/*- + * Copyright (c) 2010 Isilon Systems, Inc. + * Copyright (c) 2010 iX Systems, Inc. + * Copyright (c) 2010 Panasas, Inc. + * Copyright (c) 2013, 2014 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_RWLOCK_H_ +#define _LINUX_RWLOCK_H_ + +#include <sys/types.h> +#include <sys/lock.h> +#include <sys/rwlock.h> +#include <sys/libkern.h> + +typedef struct { + struct rwlock rw; +} rwlock_t; + +#define read_lock(_l) rw_rlock(&(_l)->rw) +#define write_lock(_l) rw_wlock(&(_l)->rw) +#define read_unlock(_l) rw_runlock(&(_l)->rw) +#define write_unlock(_l) rw_wunlock(&(_l)->rw) +#define read_lock_irq(lock) read_lock((lock)) +#define read_unlock_irq(lock) read_unlock((lock)) +#define write_lock_irq(lock) write_lock((lock)) +#define write_unlock_irq(lock) write_unlock((lock)) +#define read_lock_irqsave(lock, flags) \ + do {(flags) = 0; read_lock(lock); } while (0) +#define write_lock_irqsave(lock, flags) \ + do {(flags) = 0; write_lock(lock); } while (0) +#define read_unlock_irqrestore(lock, flags) \ + do { read_unlock(lock); } while (0) +#define write_unlock_irqrestore(lock, flags) \ + do { write_unlock(lock); } while (0) + +static inline void +rwlock_init(rwlock_t *lock) +{ + + memset(&lock->rw, 0, sizeof(lock->rw)); + rw_init_flags(&lock->rw, "lnxrw", RW_NOWITNESS); +} + +#endif /* _LINUX_RWLOCK_H_ */ |