Instead of detecting if lock is already initialized based on standard 1 bit
check, use more accurate 13 bits check. We had too many false-positives with the standard check. Reported by: mlaier
This commit is contained in:
Pawel Jakub Dawidek
parent
1868634782
commit
24bda1641f
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=168514
46
sys/cddl/compat/opensolaris/sys/lock.h
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46
sys/cddl/compat/opensolaris/sys/lock.h
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@ -0,0 +1,46 @@
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/*-
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* Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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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 AUTHORS 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 AUTHORS 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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* $FreeBSD$
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*/
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#ifndef _OPENSOLARIS_SYS_LOCK_H_
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#define _OPENSOLARIS_SYS_LOCK_H_
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#include_next <sys/lock.h>
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#ifdef _KERNEL
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#define LO_ALLMASK (LO_INITIALIZED | LO_WITNESS | LO_QUIET | \
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LO_RECURSABLE | LO_SLEEPABLE | LO_UPGRADABLE | \
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LO_DUPOK | LO_ENROLLPEND | LO_CLASSMASK | \
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LO_NOPROFILE)
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#define LO_EXPECTED (LO_INITIALIZED | LO_WITNESS | LO_RECURSABLE | \
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LO_SLEEPABLE | LO_UPGRADABLE | LO_DUPOK | \
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/* sx lock class */(2 << LO_CLASSSHIFT))
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#endif /* defined(_KERNEL) */
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#endif /* _OPENSOLARIS_SYS_LOCK_H_ */
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@ -48,6 +48,9 @@ typedef struct sx kmutex_t;
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#define mutex_init(lock, desc, type, arg) do { \
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ASSERT((type) == MUTEX_DEFAULT); \
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KASSERT(((lock)->lock_object.lo_flags & LO_ALLMASK) != \
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LO_EXPECTED, ("lock %s already initialized", #lock)); \
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bzero((lock), sizeof(struct sx)); \
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sx_init_flags((lock), "zfs:" #lock, SX_DUPOK); \
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} while (0)
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#define mutex_destroy(lock) sx_destroy(lock)
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@ -53,8 +53,12 @@ typedef struct sx krwlock_t;
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#define RW_LOCK_HELD(x) (rw_lock_held((x)))
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#define RW_ISWRITER(x) (rw_iswriter(x))
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#define rw_init(lock, desc, type, arg) \
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sx_init_flags((lock), "zfs:" #lock, SX_DUPOK)
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#define rw_init(lock, desc, type, arg) do { \
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KASSERT(((lock)->lock_object.lo_flags & LO_ALLMASK) != \
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LO_EXPECTED, ("lock %s already initialized", #lock)); \
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bzero((lock), sizeof(struct sx)); \
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sx_init_flags((lock), "zfs:" #lock, SX_DUPOK); \
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} while (0)
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#define rw_destroy(lock) sx_destroy(lock)
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#define rw_enter(lock, how) do { \
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if ((how) == RW_READER) \
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46
sys/compat/opensolaris/sys/lock.h
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46
sys/compat/opensolaris/sys/lock.h
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@ -0,0 +1,46 @@
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/*-
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* Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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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 AUTHORS 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 AUTHORS 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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* $FreeBSD$
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*/
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#ifndef _OPENSOLARIS_SYS_LOCK_H_
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#define _OPENSOLARIS_SYS_LOCK_H_
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#include_next <sys/lock.h>
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#ifdef _KERNEL
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#define LO_ALLMASK (LO_INITIALIZED | LO_WITNESS | LO_QUIET | \
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LO_RECURSABLE | LO_SLEEPABLE | LO_UPGRADABLE | \
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LO_DUPOK | LO_ENROLLPEND | LO_CLASSMASK | \
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LO_NOPROFILE)
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#define LO_EXPECTED (LO_INITIALIZED | LO_WITNESS | LO_RECURSABLE | \
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LO_SLEEPABLE | LO_UPGRADABLE | LO_DUPOK | \
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/* sx lock class */(2 << LO_CLASSSHIFT))
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#endif /* defined(_KERNEL) */
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#endif /* _OPENSOLARIS_SYS_LOCK_H_ */
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@ -48,6 +48,9 @@ typedef struct sx kmutex_t;
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#define mutex_init(lock, desc, type, arg) do { \
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ASSERT((type) == MUTEX_DEFAULT); \
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KASSERT(((lock)->lock_object.lo_flags & LO_ALLMASK) != \
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LO_EXPECTED, ("lock %s already initialized", #lock)); \
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bzero((lock), sizeof(struct sx)); \
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sx_init_flags((lock), "zfs:" #lock, SX_DUPOK); \
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} while (0)
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#define mutex_destroy(lock) sx_destroy(lock)
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@ -53,8 +53,12 @@ typedef struct sx krwlock_t;
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#define RW_LOCK_HELD(x) (rw_lock_held((x)))
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#define RW_ISWRITER(x) (rw_iswriter(x))
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#define rw_init(lock, desc, type, arg) \
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sx_init_flags((lock), "zfs:" #lock, SX_DUPOK)
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#define rw_init(lock, desc, type, arg) do { \
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KASSERT(((lock)->lock_object.lo_flags & LO_ALLMASK) != \
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LO_EXPECTED, ("lock %s already initialized", #lock)); \
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bzero((lock), sizeof(struct sx)); \
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sx_init_flags((lock), "zfs:" #lock, SX_DUPOK); \
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} while (0)
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#define rw_destroy(lock) sx_destroy(lock)
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#define rw_enter(lock, how) do { \
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if ((how) == RW_READER) \
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