2 * Copyright (c) 2015-2020 François Tigeot <ftigeot@wolfpond.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #ifndef _LINUX_SPINLOCK_H_
28 #define _LINUX_SPINLOCK_H_
30 #include <linux/preempt.h>
31 #include <linux/linkage.h>
32 #include <linux/compiler.h>
33 #include <linux/irqflags.h>
34 #include <linux/thread_info.h>
35 #include <linux/kernel.h>
36 #include <linux/stringify.h>
37 #include <linux/bottom_half.h>
38 #include <asm/barrier.h>
40 #include <linux/spinlock_types.h>
42 #include <linux/rwlock.h>
44 #include <sys/spinlock2.h>
47 #define spin_is_locked(x) spin_held(x)
49 #define assert_spin_locked(x) KKASSERT(lockinuse(x))
51 typedef struct lock spinlock_t;
54 * The spin_lock_irq() family of functions stop hardware interrupts
55 * from being delivered to the local CPU.
56 * A crit_enter()/crit_exit() sequence does the same thing on the
59 static inline void spin_lock_irq(struct lock *lock)
62 lockmgr(lock, LK_EXCLUSIVE);
65 static inline void spin_unlock_irq(struct lock *lock)
67 lockmgr(lock, LK_RELEASE);
71 #define spin_lock_irqsave(lock, flags) do { flags = 0; spin_lock_irq(lock); } while(0)
72 #define spin_unlock_irqrestore(lock, flags) do { flags = 0; spin_unlock_irq(lock); } while(0)
75 spin_lock_bh(struct lock *lock)
81 spin_unlock_bh(struct lock *lock)
83 spin_unlock_irq(lock);
86 #define DEFINE_SPINLOCK(x) struct lock x = LOCK_INITIALIZER("ds##x", 0, 0)
88 #define spin_lock_irqsave_nested(lock, flags, subclass) \
89 spin_lock_irqsave(lock, flags)
91 #endif /* _LINUX_SPINLOCK_H_ */