Fix: update ftrace probe for kernel 4.12

[lttng-modules.git] / wrapper / ftrace.h

diff --git a/wrapper/ftrace.h b/wrapper/ftrace.h
index ace33c54100daf91235b611ee275d4727d4c575e..de618734e44ee4cf4e6f587291dad59f37825a07 100644 (file)
--- a/wrapper/ftrace.h
+++ b/wrapper/ftrace.h
@@ -1,22 +1,40 @@
-#ifndef _LTT_WRAPPER_FTRACE_H
-#define _LTT_WRAPPER_FTRACE_H
+#ifndef _LTTNG_WRAPPER_FTRACE_H
+#define _LTTNG_WRAPPER_FTRACE_H
 
 /*
- * Copyright (C) 2011 Mathieu Desnoyers (mathieu.desnoyers@efficios.com)
+ * wrapper/ftrace.h
  *
  * wrapper around vmalloc_sync_all. Using KALLSYMS to get its address when
  * available, else we need to have a kernel that exports this function to GPL
  * modules.
  *
- * Dual LGPL v2.1/GPL v2 license.
+ * Copyright (C) 2011-2012 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/ftrace.h>
+#include <linux/version.h>
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,12,0))
+#include <../kernel/trace/trace.h>
+#endif
 
 #ifdef CONFIG_KALLSYMS
 
 #include <linux/kallsyms.h>
-#include "kallsyms.h"
+#include <wrapper/kallsyms.h>
 
 static inline
 int wrapper_register_ftrace_function_probe(char *glob,
@@ -29,7 +47,7 @@ int wrapper_register_ftrace_function_probe(char *glob,
        if (register_ftrace_function_probe_sym) {
                return register_ftrace_function_probe_sym(glob, ops, data);
        } else {
-               printk(KERN_WARNING "LTTng: register_ftrace_function_probe symbol lookup failed.\n");
+               printk_once(KERN_WARNING "LTTng: register_ftrace_function_probe symbol lookup failed.\n");
                return -EINVAL;
        }
 }
@@ -45,7 +63,7 @@ void wrapper_unregister_ftrace_function_probe(char *glob,
        if (unregister_ftrace_function_probe_sym) {
                unregister_ftrace_function_probe_sym(glob, ops, data);
        } else {
-               printk(KERN_WARNING "LTTng: unregister_ftrace_function_probe symbol lookup failed.\n");
+               printk_once(KERN_WARNING "LTTng: unregister_ftrace_function_probe symbol lookup failed.\n");
                WARN_ON(1);
        }
 }
@@ -67,4 +85,4 @@ void wrapper_unregister_ftrace_function_probe(char *glob,
 }
 #endif
 
-#endif /* _LTT_WRAPPER_FTRACE_H */
+#endif /* _LTTNG_WRAPPER_FTRACE_H */