diff options
Diffstat (limited to 'sys/arch/amd64/include/mutex.h')
| -rw-r--r-- | sys/arch/amd64/include/mutex.h | 86 |
1 files changed, 2 insertions, 84 deletions
diff --git a/sys/arch/amd64/include/mutex.h b/sys/arch/amd64/include/mutex.h index 20078d4b7f7..b5b66f12fb0 100644 --- a/sys/arch/amd64/include/mutex.h +++ b/sys/arch/amd64/include/mutex.h @@ -1,85 +1,3 @@ -/* $OpenBSD: mutex.h,v 1.10 2018/01/13 15:18:11 mpi Exp $ */ +/* $OpenBSD: mutex.h,v 1.11 2018/01/25 15:06:29 mpi Exp $ */ -/* - * Copyright (c) 2004 Artur Grabowski <art@openbsd.org> - * 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, this list of conditions and the following disclaimer. - * 2. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED ``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. - */ - -#ifndef _MACHINE_MUTEX_H_ -#define _MACHINE_MUTEX_H_ - -#include <sys/_lock.h> - -struct mutex { - volatile void *mtx_owner; - int mtx_wantipl; - int mtx_oldipl; -#ifdef WITNESS - struct lock_object mtx_lock_obj; -#endif -}; - -/* - * To prevent lock ordering problems with the kernel lock, we need to - * make sure we block all interrupts that can grab the kernel lock. - * The simplest way to achieve this is to make sure mutexes always - * raise the interrupt priority level to the highest level that has - * interrupts that grab the kernel lock. - */ -#ifdef MULTIPROCESSOR -#define __MUTEX_IPL(ipl) \ - (((ipl) > IPL_NONE && (ipl) < IPL_MPFLOOR) ? IPL_MPFLOOR : (ipl)) -#else -#define __MUTEX_IPL(ipl) (ipl) -#endif - -#ifdef WITNESS -#define MUTEX_INITIALIZER_FLAGS(ipl, name, flags) \ - { NULL, __MUTEX_IPL((ipl)), IPL_NONE, MTX_LO_INITIALIZER(name, flags) } -#else -#define MUTEX_INITIALIZER_FLAGS(ipl, name, flags) \ - { NULL, __MUTEX_IPL((ipl)), IPL_NONE } -#endif - -void __mtx_init(struct mutex *, int); -#define _mtx_init(mtx, ipl) __mtx_init((mtx), __MUTEX_IPL((ipl))) - -#ifdef DIAGNOSTIC -#define MUTEX_ASSERT_LOCKED(mtx) do { \ - if ((mtx)->mtx_owner != curcpu()) \ - panic("mutex %p not held in %s", (mtx), __func__); \ -} while (0) - -#define MUTEX_ASSERT_UNLOCKED(mtx) do { \ - if ((mtx)->mtx_owner == curcpu()) \ - panic("mutex %p held in %s", (mtx), __func__); \ -} while (0) -#else -#define MUTEX_ASSERT_LOCKED(mtx) do { } while (0) -#define MUTEX_ASSERT_UNLOCKED(mtx) do { } while (0) -#endif - -#define MUTEX_LOCK_OBJECT(mtx) (&(mtx)->mtx_lock_obj) -#define MUTEX_OLDIPL(mtx) (mtx)->mtx_oldipl - -#endif /* _MACHINE_MUTEX_H_ */ +#define __USE_MI_MUTEX |