jfs_lock.h
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/*
* Copyright (C) International Business Machines Corp., 2000-2001
* Portions Copyright (C) Christoph Hellwig, 2001-2002
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _H_JFS_LOCK
#define _H_JFS_LOCK
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <linux/sched.h>
/*
* jfs_lock.h
*/
/*
* Conditional sleep where condition is protected by spinlock
*
* lock_cmd and unlock_cmd take and release the spinlock
*/
#define __SLEEP_COND(wq, cond, lock_cmd, unlock_cmd) \
do { \
DECLARE_WAITQUEUE(__wait, current); \
\
add_wait_queue(&wq, &__wait); \
for (;;) { \
set_current_state(TASK_UNINTERRUPTIBLE);\
if (cond) \
break; \
unlock_cmd; \
io_schedule(); \
lock_cmd; \
} \
__set_current_state(TASK_RUNNING); \
remove_wait_queue(&wq, &__wait); \
} while (0)
#endif /* _H_JFS_LOCK */