Fix: lttng_this_cpu_ptr wrapper for kernel 3.19+

[lttng-modules.git] / wrapper / percpu-defs.h

diff --git a/wrapper/percpu-defs.h b/wrapper/percpu-defs.h
new file mode 100644 (file)
index 0000000..bba1bce
--- /dev/null
+++ b/wrapper/percpu-defs.h
@@ -0,0 +1,42 @@
+#ifndef _LTTNG_WRAPPER_PERCPU_DEFS_H
+#define _LTTNG_WRAPPER_PERCPU_DEFS_H
+
+/*
+ * wrapper/percpu-defs.h
+ *
+ * wrapper around linux/percpu-defs.h.
+ *
+ * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0)
+
+#include <linux/percpu-defs.h>
+
+#define lttng_this_cpu_ptr(ptr)                this_cpu_ptr(ptr)
+
+#else /* #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0) */
+
+#include <linux/percpu.h>
+
+#define lttng_this_cpu_ptr(ptr)                (&__get_cpu_var(*(ptr)))
+
+#endif /* #else #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,0) */
+
+#endif /* _LTTNG_WRAPPER_PERCPU_DEFS_H */