From 212cd2b3a01cedec944d143b8bb0024628a2f382 Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Wed, 25 Oct 2006 13:58:30 +0100 Subject: PV-on-HVM: Add a compatibility linux/mutex.h for kernels before 2.6.16. This implements the new mutex type in terms of the old semaphore type. Signed-off-by: Ian Campbell Signed-off-by: K. Y. Srinivasan Signed-off-by: Tsunehisa Doi --- .../linux-2.6/compat-include/linux/mutex.h | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 unmodified_drivers/linux-2.6/compat-include/linux/mutex.h (limited to 'unmodified_drivers/linux-2.6/compat-include') diff --git a/unmodified_drivers/linux-2.6/compat-include/linux/mutex.h b/unmodified_drivers/linux-2.6/compat-include/linux/mutex.h new file mode 100644 index 0000000000..fcb4a899c7 --- /dev/null +++ b/unmodified_drivers/linux-2.6/compat-include/linux/mutex.h @@ -0,0 +1,31 @@ +/* + * Copyright (c) 2006 Cisco Systems. All rights reserved. + * + * This file is released under the GPLv2. + */ + +/* mutex compatibility for pre-2.6.16 kernels */ + +#ifndef __LINUX_MUTEX_H +#define __LINUX_MUTEX_H + +#include + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16) +#error "This version of Linux should not need compat mutex.h" +#endif + +#include +#include + +#define mutex semaphore +#define DEFINE_MUTEX(foo) DECLARE_MUTEX(foo) +#define mutex_init(foo) init_MUTEX(foo) +#define mutex_lock(foo) down(foo) +#define mutex_lock_interruptible(foo) down_interruptible(foo) +/* this function follows the spin_trylock() convention, so * + * it is negated to the down_trylock() return values! Be careful */ +#define mutex_trylock(foo) !down_trylock(foo) +#define mutex_unlock(foo) up(foo) + +#endif /* __LINUX_MUTEX_H */ -- cgit v1.2.3