patch-2.4.27 linux-2.4.27/fs/xfs/linux-2.4/spin.h

• Lines: 57
• Date: 2004-08-07 16:26:06.066404797 -0700
• Orig file: linux-2.4.26/fs/xfs/linux-2.4/spin.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.26/fs/xfs/linux-2.4/spin.h linux-2.4.27/fs/xfs/linux-2.4/spin.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_SUPPORT_SPIN_H__
+#define __XFS_SUPPORT_SPIN_H__
+
+#include <linux/sched.h>	/* preempt needs this */
+#include <linux/spinlock.h>
+
+/*
+ * Map lock_t from IRIX to Linux spinlocks.
+ *
+ * We do not make use of lock_t from interrupt context, so we do not
+ * have to worry about disabling interrupts at all (unlike IRIX).
+ */
+
+typedef spinlock_t lock_t;
+
+#define SPLDECL(s)			unsigned long s
+
+#define spinlock_init(lock, name)	spin_lock_init(lock)
+#define	spinlock_destroy(lock)
+#define mutex_spinlock(lock)		({ spin_lock(lock); 0; })
+#define mutex_spinunlock(lock, s)	do { spin_unlock(lock); (void)s; } while (0)
+#define nested_spinlock(lock)		spin_lock(lock)
+#define nested_spinunlock(lock)		spin_unlock(lock)
+
+#endif /* __XFS_SUPPORT_SPIN_H__ */