Remove lttng-ftrace integration

[lttng-modules.git] / wrapper / splice.c

diff --git a/wrapper/splice.c b/wrapper/splice.c
index 357e1ac5a84560dca04613ab718ca76a535d2032..916ec95570a65d604f540ac30df2248e3ab5dca7 100644 (file)
--- a/wrapper/splice.c
+++ b/wrapper/splice.c
@@ -3,7 +3,7 @@
  *
  * wrapper around splice_to_pipe. Using KALLSYMS to get its address when
  * available, else we need to have a kernel that exports this function to GPL
- * modules.
+ * modules. The export was introduced in kernel 4.2.
  *
  * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
@@ -22,7 +22,10 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifdef CONFIG_KALLSYMS
+#include <lttng-kernel-version.h>
+
+#if (defined(CONFIG_KALLSYMS) \
+       && (LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)))
 
 #include <linux/kallsyms.h>
 #include <linux/fs.h>
@@ -41,7 +44,7 @@ ssize_t wrapper_splice_to_pipe(struct pipe_inode_info *pipe,
        if (splice_to_pipe_sym) {
                return splice_to_pipe_sym(pipe, spd);
        } else {
-               printk(KERN_WARNING "LTTng: splice_to_pipe symbol lookup failed.\n");
+               printk_once(KERN_WARNING "LTTng: splice_to_pipe symbol lookup failed.\n");
                return -ENOSYS;
        }
 }