X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=wrapper%2Fsplice.c;h=916ec95570a65d604f540ac30df2248e3ab5dca7;hb=c7f2a03aa26ba4e481f63c1824e02018edf475a2;hp=357e1ac5a84560dca04613ab718ca76a535d2032;hpb=5a2f5e92e422d87a28581ba97e6b1789ff743bc6;p=lttng-modules.git

diff --git a/wrapper/splice.c b/wrapper/splice.c
index 357e1ac5..916ec955 100644
--- 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;
 	}
 }