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Ian Campbell
212cd2b3a0
2.6.16. This implements the new mutex type in terms of the old semaphore type. Signed-off-by: Ian Campbell <ian.campbell@xensource.com> Signed-off-by: K. Y. Srinivasan <ksrinivasan@novell.com> Signed-off-by: Tsunehisa Doi <Doi.Tsunehisa@jp.fujitsu.com>
32 lines
865 B
C
32 lines
865 B
C
/*
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* Copyright (c) 2006 Cisco Systems. All rights reserved.
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*
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* This file is released under the GPLv2.
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*/
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/* mutex compatibility for pre-2.6.16 kernels */
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#ifndef __LINUX_MUTEX_H
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#define __LINUX_MUTEX_H
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#include <linux/version.h>
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
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#error "This version of Linux should not need compat mutex.h"
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#endif
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#include <linux/version.h>
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#include <asm/semaphore.h>
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#define mutex semaphore
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#define DEFINE_MUTEX(foo) DECLARE_MUTEX(foo)
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#define mutex_init(foo) init_MUTEX(foo)
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#define mutex_lock(foo) down(foo)
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#define mutex_lock_interruptible(foo) down_interruptible(foo)
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/* this function follows the spin_trylock() convention, so *
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* it is negated to the down_trylock() return values! Be careful */
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#define mutex_trylock(foo) !down_trylock(foo)
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#define mutex_unlock(foo) up(foo)
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#endif /* __LINUX_MUTEX_H */
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