[LinuxBIOS] r420 - LinuxBIOSv3/include

[svn at openbios.org]

Author: stepan
Date: 2007-06-29 22:25:30 +0200 (Fri, 29 Jun 2007)
New Revision: 420

Added:
   LinuxBIOSv3/include/spinlock.h
Log:
oops. forgot this.

Signed-off-by: Stefan Reinauer <stepan at coresystems.de>
Acked-by: Stefan Reinauer <stepan at coresystems.de>



Added: LinuxBIOSv3/include/spinlock.h
===================================================================
--- LinuxBIOSv3/include/spinlock.h	                        (rev 0)
+++ LinuxBIOSv3/include/spinlock.h	2007-06-29 20:25:30 UTC (rev 420)
@@ -0,0 +1,45 @@
+/*
+ * This file is part of the LinuxBIOS project.
+ *
+ * Copyright (C) 2001 Linux Networx
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef SPINLOCK_H
+#define SPINLOCK_H
+
+#if defined(CONFIG_SMP) && CONFIG_SMP == 1
+#include <arch/spinlock.h>
+#else /* !CONFIG_SMP */
+
+/* Most GCC versions have a nasty bug with empty initializers */
+#if (__GNUC__ > 2) 
+typedef struct { } spinlock_t;
+#define SPIN_LOCK_UNLOCKED (spinlock_t) { }
+#else
+typedef struct { int gcc_is_buggy; } spinlock_t;
+#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
+#endif
+
+#define barrier()		do {} while(0)
+#define spin_is_locked(lock)	0
+#define spin_unlock_wait(lock)	do {} while(0)
+#define spin_lock(lock)		do {} while(0)
+#define spin_unlock(lock)	do {} while(0)
+#define cpu_relax()		do {} while(0)
+#endif
+
+#endif /* SPINLOCK_H */