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usr / src / sys / compat / linuxkpi / common / include / linux /

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📄 backlight.h(2.88 KB)
📄 bitfield.h(3.2 KB)
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📄 rwlock.h(2.55 KB)
📄 rwsem.h(3.06 KB)
📄 scatterlist.h(12.58 KB)
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📄 workqueue.h(7.58 KB)
📄 ww_mutex.h(3.74 KB)
📄 xarray.h(3.33 KB)

Editing: rwsem.h

/*-
 * Copyright (c) 2010 Isilon Systems, Inc.
 * Copyright (c) 2010 iX Systems, Inc.
 * Copyright (c) 2010 Panasas, Inc.
 * Copyright (c) 2013-2017 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_RWSEM_H_
#define	_LINUX_RWSEM_H_

#include <sys/param.h>
#include <sys/lock.h>
#include <sys/sx.h>
#include <sys/libkern.h>
#include <sys/kernel.h>

struct rw_semaphore {
	struct sx sx;
};

#define	down_write(_rw)			sx_xlock(&(_rw)->sx)
#define	up_write(_rw)			sx_xunlock(&(_rw)->sx)
#define	down_read(_rw)			sx_slock(&(_rw)->sx)
#define	up_read(_rw)			sx_sunlock(&(_rw)->sx)
#define	down_read_trylock(_rw)		!!sx_try_slock(&(_rw)->sx)
#define	down_write_trylock(_rw)		!!sx_try_xlock(&(_rw)->sx)
#define	down_write_killable(_rw)	linux_down_write_killable(_rw)
#define	downgrade_write(_rw)		sx_downgrade(&(_rw)->sx)
#define	down_read_nested(_rw, _sc)	down_read(_rw)
#define	init_rwsem(_rw)			linux_init_rwsem(_rw, rwsem_name("lnxrwsem"))

#ifdef WITNESS_ALL
/* NOTE: the maximum WITNESS name is 64 chars */
#define	__rwsem_name(name, file, line)		\
	(((const char *){file ":" #line "-" name}) +	\
	(sizeof(file) > 16 ? sizeof(file) - 16 : 0))
#else
#define	__rwsem_name(name, file, line)	name
#endif
#define	_rwsem_name(...)		__rwsem_name(__VA_ARGS__)
#define	rwsem_name(name)		_rwsem_name(name, __FILE__, __LINE__)

#define	DECLARE_RWSEM(name)						\
struct rw_semaphore name;						\
static void name##_rwsem_init(void *arg)				\
{									\
	linux_init_rwsem(&name, rwsem_name(#name));			\
}									\
SYSINIT(name, SI_SUB_LOCK, SI_ORDER_SECOND, name##_rwsem_init, NULL)

static inline void
linux_init_rwsem(struct rw_semaphore *rw, const char *name)
{

memset(rw, 0, sizeof(*rw));
	sx_init_flags(&rw->sx, name, SX_NOWITNESS);
}

extern int linux_down_write_killable(struct rw_semaphore *);

#endif					/* _LINUX_RWSEM_H_ */

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Editing: rwsem.h

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