From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Fri, 24 Jun 2011 02:47:25 +0000 (-0400)
Subject: Add raw spinlock wrapper for kernels < 2.6.33
X-Git-Tag: v2.0-pre1~38
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=a181050f402c41239e5537b89c66e0349af65d61;p=lttng-modules.git

Add raw spinlock wrapper for kernels < 2.6.33

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/lib/ringbuffer/frontend_types.h b/lib/ringbuffer/frontend_types.h
index fe208b67..283a254f 100644
--- a/lib/ringbuffer/frontend_types.h
+++ b/lib/ringbuffer/frontend_types.h
@@ -19,6 +19,7 @@
 #include <linux/kref.h>
 #include "../../wrapper/ringbuffer/config.h"
 #include "../../wrapper/ringbuffer/backend_types.h"
+#include "../../wrapper/spinlock.h"
 #include "../../lib/prio_heap/lttng_prio_heap.h"	/* For per-CPU read-side iterator */
 
 /*
diff --git a/wrapper/spinlock.h b/wrapper/spinlock.h
new file mode 100644
index 00000000..af00ef28
--- /dev/null
+++ b/wrapper/spinlock.h
@@ -0,0 +1,23 @@
+#ifndef _LTT_WRAPPER_SPINLOCK_H
+#define _LTT_WRAPPER_SPINLOCK_H
+
+/*
+ * Copyright (C) 2011 Mathieu Desnoyers (mathieu.desnoyers@efficios.com)
+ *
+ * Dual LGPL v2.1/GPL v2 license.
+ */
+
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33))
+
+#define raw_spin_lock_init(lock)				\
+	do {							\
+		*(lock) = __RAW_SPIN_LOCK_UNLOCKED(lock);	\
+	} while (0)
+
+#define raw_spin_is_locked(lock)	spin_is_locked(lock)
+
+
+#endif
+#endif /* _LTT_WRAPPER_SPINLOCK_H */