1 files changed, 43 insertions, 0 deletions

diff --git a/recipes-kernel/lttng/lttng-modules/0003-Fix-pipe-stop-using-can_merge-v5.1.patch b/recipes-kernel/lttng/lttng-modules/0003-Fix-pipe-stop-using-can_merge-v5.1.patch
new file mode 100644
index 00000000..bc028537
--- /dev/null
+++ b/recipes-kernel/lttng/lttng-modules/0003-Fix-pipe-stop-using-can_merge-v5.1.patch
@@ -0,0 +1,43 @@
+From 9a203973ad3cbefb67a6032fd66e746d19b2d1c3 Mon Sep 17 00:00:00 2001
+From: Michael Jeanson <mjeanson@efficios.com>
+Date: Mon, 18 Mar 2019 16:20:34 -0400
+Subject: [PATCH 3/5] Fix: pipe: stop using ->can_merge (v5.1)
+
+See upstream commit:
+
+  commit 01e7187b41191376cee8bea8de9f907b001e87b4
+  Author: Jann Horn <jannh@google.com>
+  Date:   Wed Jan 23 15:19:18 2019 +0100
+
+    pipe: stop using ->can_merge
+
+    Al Viro pointed out that since there is only one pipe buffer type to which
+    new data can be appended, it isn't necessary to have a ->can_merge field in
+    struct pipe_buf_operations, we can just check for a magic type.
+
+Upstream-Status: Backport [http://git.lttng.org/?p=lttng-modules.git;a=commit;h=d6cd2c9598a06f0ba1ba885bbe754e8836528310]
+
+Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
+Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+Signed-off-by: Naveen Saini <naveen.kumar.saini@intel.com>
+---
+ lib/ringbuffer/ring_buffer_splice.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/lib/ringbuffer/ring_buffer_splice.c b/lib/ringbuffer/ring_buffer_splice.c
+index 8d14666..93cad29 100644
+--- a/lib/ringbuffer/ring_buffer_splice.c
++++ b/lib/ringbuffer/ring_buffer_splice.c
+@@ -56,7 +56,9 @@ static void lib_ring_buffer_pipe_buf_release(struct pipe_inode_info *pipe,
+ }
+ 
+ static const struct pipe_buf_operations ring_buffer_pipe_buf_ops = {
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(5,1,0))
+        .can_merge = 0,
++#endif
+ #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0))
+        .map = generic_pipe_buf_map,
+        .unmap = generic_pipe_buf_unmap,
+-- 
+2.17.0
+