[LinuxBIOS] r420 - LinuxBIOSv3/include
svn at openbios.org
svn at openbios.org
Fri Jun 29 22:25:30 CEST 2007
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 */
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