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9d0887402b
This will be used to implement kqfilter support for zvol cdevs. Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Reviewed-by: Alexander Motin <mav@FreeBSD.org> Signed-off-by: Rob Wing <rew@FreeBSD.org> Closes #13773
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2022 Rob Wing
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/sx.h>
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#include <sys/event.h>
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#include <sys/freebsd_event.h>
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static void
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knlist_sx_xlock(void *arg)
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{
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sx_xlock((struct sx *)arg);
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}
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static void
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knlist_sx_xunlock(void *arg)
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{
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sx_xunlock((struct sx *)arg);
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}
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static void
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knlist_sx_assert_lock(void *arg, int what)
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{
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if (what == LA_LOCKED)
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sx_assert((struct sx *)arg, SX_LOCKED);
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else
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sx_assert((struct sx *)arg, SX_UNLOCKED);
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}
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void
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knlist_init_sx(struct knlist *knl, struct sx *lock)
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{
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knlist_init(knl, lock, knlist_sx_xlock, knlist_sx_xunlock,
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knlist_sx_assert_lock);
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}
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