49 lines
1.5 KiB
Diff
49 lines
1.5 KiB
Diff
# HG changeset patch
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# User Ian Campbell <ian.campbell@xensource.com>
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# Date Wed Oct 25 13:58:30 2006 +0100
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# Node ID ecc1782f69680d94b7d2fe4283616e4890b55504
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# parent: d008b6b44f3c9bd7d7f49737fdc1c93370bf783d
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PV-on-HVM: Add a compatibility linux/mutex.h for kernels before
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2.6.16. This implements the new mutex type in terms of the old
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semaphore type.
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Signed-off-by: Ian Campbell <ian.campbell@xensource.com>
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Signed-off-by: K. Y. Srinivasan <ksrinivasan@novell.com>
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Signed-off-by: Tsunehisa Doi <Doi.Tsunehisa@jp.fujitsu.com>
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000
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+++ b/unmodified_drivers/linux-2.6/compat-include/linux/mutex.h Wed Oct 25 13:58:30 2006 +0100
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@@ -0,0 +1,31 @@
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+/*
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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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+
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+/* mutex compatibility for pre-2.6.16 kernels */
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+
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+#ifndef __LINUX_MUTEX_H
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+#define __LINUX_MUTEX_H
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+
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+#include <linux/version.h>
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+
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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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+
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+#include <linux/version.h>
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+#include <asm/semaphore.h>
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+
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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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+
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+#endif /* __LINUX_MUTEX_H */
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