diff --git a/kernel/relay.c b/kernel/relay.c
index 760c262..c705a41 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -1198,7 +1198,7 @@
 	relay_consume_bytes(rbuf, buf->private);
 }
 
-static struct pipe_buf_operations relay_pipe_buf_ops = {
+static const struct pipe_buf_operations relay_pipe_buf_ops = {
 	.can_merge = 0,
 	.map = generic_pipe_buf_map,
 	.unmap = generic_pipe_buf_unmap,
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index bb6b5e7..31118ae 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3133,7 +3133,7 @@
 	__free_page(spd->pages[idx]);
 }
 
-static struct pipe_buf_operations tracing_pipe_buf_ops = {
+static const struct pipe_buf_operations tracing_pipe_buf_ops = {
 	.can_merge		= 0,
 	.map			= generic_pipe_buf_map,
 	.unmap			= generic_pipe_buf_unmap,
@@ -3617,7 +3617,7 @@
 }
 
 /* Pipe buffer operations for a buffer. */
-static struct pipe_buf_operations buffer_pipe_buf_ops = {
+static const struct pipe_buf_operations buffer_pipe_buf_ops = {
 	.can_merge		= 0,
 	.map			= generic_pipe_buf_map,
 	.unmap			= generic_pipe_buf_unmap,
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index bfa3e78..93c4e06 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -93,7 +93,7 @@
 
 
 /* Pipe buffer operations for a socket. */
-static struct pipe_buf_operations sock_pipe_buf_ops = {
+static const struct pipe_buf_operations sock_pipe_buf_ops = {
 	.can_merge = 0,
 	.map = generic_pipe_buf_map,
 	.unmap = generic_pipe_buf_unmap,