diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/spinlock.h')
-rw-r--r-- | sys/compat/linuxkpi/common/include/linux/spinlock.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/spinlock.h b/sys/compat/linuxkpi/common/include/linux/spinlock.h new file mode 100644 index 0000000..97c83e0 --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/spinlock.h @@ -0,0 +1,70 @@ +/*- + * 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_SPINLOCK_H_ +#define _LINUX_SPINLOCK_H_ + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/mutex.h> + +#include <linux/compiler.h> +#include <linux/kernel.h> +#include <linux/rwlock.h> + +typedef struct { + struct mtx m; +} spinlock_t; + +#define spin_lock(_l) mtx_lock(&(_l)->m) +#define spin_unlock(_l) mtx_unlock(&(_l)->m) +#define spin_trylock(_l) mtx_trylock(&(_l)->m) +#define spin_lock_nested(_l, _n) mtx_lock_flags(&(_l)->m, MTX_DUPOK) +#define spin_lock_irq(lock) spin_lock(lock) +#define spin_unlock_irq(lock) spin_unlock(lock) +#define spin_lock_irqsave(lock, flags) \ + do {(flags) = 0; spin_lock(lock); } while (0) +#define spin_unlock_irqrestore(lock, flags) \ + do { spin_unlock(lock); } while (0) + +static inline void +spin_lock_init(spinlock_t *lock) +{ + + memset(&lock->m, 0, sizeof(lock->m)); + mtx_init(&lock->m, "lnxspin", NULL, MTX_DEF | MTX_NOWITNESS); +} + +#define DEFINE_SPINLOCK(lock) \ + spinlock_t lock; \ + MTX_SYSINIT(lock, &(lock).m, "lnxspin", MTX_DEF) + +#endif /* _LINUX_SPINLOCK_H_ */ |