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  • Committer: Bazaar Package Importer
  • Author(s): Daniel Baumann
  • Date: 2009-05-30 09:48:43 UTC
  • mfrom: (1.1.5 upstream) (2.4.4 squeeze)
  • Revision ID: james.westby@ubuntu.com-20090530094843-gdpza57r5iqsf124
Tags: 2009.05.22-167859-1
Merging upstream version 2009.05.22-167859.

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modules/linux/vmhgfs/compat_spinlock.h
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/*********************************************************
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 * Copyright (C) 2005 VMware, Inc. All rights reserved.
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 *
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 * This program is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License as published by the
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 * Free Software Foundation version 2 and no later version.
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 *
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 * This program is distributed in the hope that it will be useful, but
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 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * for more details.
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 *
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 * You should have received a copy of the GNU General Public License along
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 * with this program; if not, write to the Free Software Foundation, Inc.,
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 * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
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 *
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 *********************************************************/
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#ifndef __COMPAT_SPINLOCK_H__
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#   define __COMPAT_SPINLOCK_H__
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/*
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 * The spin_lock() API appeared in 2.1.25 in asm/smp_lock.h
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 * It moved in 2.1.30 to asm/spinlock.h
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 * It moved again in 2.3.18 to linux/spinlock.h
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 *
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 *   --hpreg
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 */
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 3, 18)
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#   include <linux/spinlock.h>
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#else
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#   if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 1, 30)
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#      include <asm/spinlock.h>
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#   else
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typedef struct {} spinlock_t;
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#      define spin_lock_init(lock)
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#      define spin_lock(lock)
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#      define spin_unlock(lock)
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#      define spin_lock_irqsave(lock, flags) do {      \
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                    save_flags(flags);                 \
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                    cli();                             \
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                    spin_lock(lock);                   \
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                 } while (0)
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#      define spin_unlock_irqrestore(lock, flags) do { \
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                    spin_unlock(lock);                 \
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                    restore_flags(flags);              \
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                 } while (0)
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#   endif
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#endif
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/*
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 * Preempt support was added during 2.5.x development cycle, and later
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 * it was backported to 2.4.x.  In 2.4.x backport these definitions
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 * live in linux/spinlock.h, that's why we put them here (in 2.6.x they
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 * are defined in linux/preempt.h which is included by linux/spinlock.h).
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 */
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#ifdef CONFIG_PREEMPT
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#define compat_preempt_disable() preempt_disable()
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#define compat_preempt_enable()  preempt_enable()
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#else
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#define compat_preempt_disable() do { } while (0)
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#define compat_preempt_enable()  do { } while (0)
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#endif
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#endif /* __COMPAT_SPINLOCK_H__ */