2 * SUBR_RBTREE.C - Generic red-black tree support
4 * Copyright (c) 2011 The DragonFly Project. All rights reserved.
6 * This code is derived from software contributed to The DragonFly Project
7 * by Matthew Dillon <dillon@backplane.com>
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10 * modification, are permitted provided that the following conditions
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37 #include <sys/param.h>
38 #include <sys/kernel.h>
39 #include <sys/spinlock.h>
42 #include <sys/spinlock2.h>
45 * Support function for RB_SCAN. The info linkage functions require a
46 * temporary spinlock to avoid running over each other when RB_SCAN()
47 * is called with a shared lock held instread of an exclusive lock.
49 * (e.g. shared VM object locks).
52 rb_spin_lock(struct spinlock *spin)
58 rb_spin_unlock(struct spinlock *spin)