drivers/staging/lttng/wrapper/spinlock.h

   1 #ifndef _LTTNG_WRAPPER_SPINLOCK_H
   2 #define _LTTNG_WRAPPER_SPINLOCK_H
   3
   4 /*
   5  * wrapper/spinlock.h
   6  *
   7  * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; only
  12  * version 2.1 of the License.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #include <linux/version.h>
  25
  26 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33))
  27
  28 #include <linux/string.h>
  29
  30 #define raw_spin_lock_init(lock)                                        \
  31         do {                                                            \
  32                 raw_spinlock_t __lock = __RAW_SPIN_LOCK_UNLOCKED;       \
  33                 memcpy(lock, &__lock, sizeof(lock));                    \
  34         } while (0)
  35
  36 #define raw_spin_is_locked(lock)        __raw_spin_is_locked(lock)
  37
  38 #define wrapper_desc_spin_lock(lock)    spin_lock(lock)
  39 #define wrapper_desc_spin_unlock(lock)  spin_unlock(lock)
  40
  41 #else
  42
  43 #define wrapper_desc_spin_lock(lock)    raw_spin_lock(lock)
  44 #define wrapper_desc_spin_unlock(lock)  raw_spin_unlock(lock)
  45
  46 #endif
  47 #endif /* _LTTNG_WRAPPER_SPINLOCK_H */