diff --git a/src/core/ext/census/grpc_filter.c b/src/core/ext/census/grpc_filter.c
index 65cfe1fa9028ba668eb01acd6f166c6d74733b9c..b80d831557f7ecab0f3c9a8a2fdb4a0814fe5b19 100644
--- a/src/core/ext/census/grpc_filter.c
+++ b/src/core/ext/census/grpc_filter.c
@@ -127,7 +127,7 @@ static void server_start_transport_op(grpc_exec_ctx *exec_ctx,
static grpc_error *client_init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
call_data *d = elem->call_data;
GPR_ASSERT(d != NULL);
memset(d, 0, sizeof(*d));
@@ -146,7 +146,7 @@ static void client_destroy_call_elem(grpc_exec_ctx *exec_ctx,
static grpc_error *server_init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
call_data *d = elem->call_data;
GPR_ASSERT(d != NULL);
memset(d, 0, sizeof(*d));
diff --git a/src/core/ext/client_channel/client_channel.c b/src/core/ext/client_channel/client_channel.c
index 06038bb5ba95bbf88f59e14bb8b319c49e3f89a3..f85f445c33c22097a74bb36bf759599959e6b5ac 100644
--- a/src/core/ext/client_channel/client_channel.c
+++ b/src/core/ext/client_channel/client_channel.c
@@ -1054,7 +1054,7 @@ static void read_service_config(grpc_exec_ctx *exec_ctx, void *arg,
/* Constructor for call_data */
static grpc_error *cc_init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
channel_data *chand = elem->channel_data;
call_data *calld = elem->call_data;
// Initialize data members.
diff --git a/src/core/ext/load_reporting/load_reporting_filter.c b/src/core/ext/load_reporting/load_reporting_filter.c
index 8af6191c3b8850e236f7f1f5c6f5590e81109897..c1f72a101a25ee053ca96c1f024c63555947ceb4 100644
--- a/src/core/ext/load_reporting/load_reporting_filter.c
+++ b/src/core/ext/load_reporting/load_reporting_filter.c
@@ -100,7 +100,7 @@ static void on_initial_md_ready(grpc_exec_ctx *exec_ctx, void *user_data,
/* Constructor for call_data */
static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
call_data *calld = elem->call_data;
memset(calld, 0, sizeof(call_data));
diff --git a/src/core/lib/channel/channel_stack.c b/src/core/lib/channel/channel_stack.c
index ec973d4e7f8bd90bc8d517e356f72227e80d4674..3fb2a60ac719245c0b28db53277728e5d90b74f6 100644
--- a/src/core/lib/channel/channel_stack.c
+++ b/src/core/lib/channel/channel_stack.c
@@ -173,7 +173,6 @@ grpc_error *grpc_call_stack_init(
grpc_slice path, gpr_timespec start_time, gpr_timespec deadline,
grpc_call_stack *call_stack) {
grpc_channel_element *channel_elems = CHANNEL_ELEMS_FROM_STACK(channel_stack);
- grpc_call_element_args args;
size_t count = channel_stack->count;
grpc_call_element *call_elems;
char *user_data;
@@ -188,13 +187,15 @@ grpc_error *grpc_call_stack_init(
/* init per-filter data */
grpc_error *first_error = GRPC_ERROR_NONE;
- args.start_time = start_time;
+ const grpc_call_element_args args = {
+ .start_time = start_time,
+ .call_stack = call_stack,
+ .server_transport_data = transport_server_data,
+ .context = context,
+ .path = path,
+ .deadline = deadline,
+ };
for (i = 0; i < count; i++) {
- args.call_stack = call_stack;
- args.server_transport_data = transport_server_data;
- args.context = context;
- args.path = path;
- args.deadline = deadline;
call_elems[i].filter = channel_elems[i].filter;
call_elems[i].channel_data = channel_elems[i].channel_data;
call_elems[i].call_data = user_data;
diff --git a/src/core/lib/channel/channel_stack.h b/src/core/lib/channel/channel_stack.h
index 1cf07d43c24e354a4e7f19afd49dd706f9dbd2cd..1e943dc2e56aaf01e235e0cd9dde6dc96ee4f164 100644
--- a/src/core/lib/channel/channel_stack.h
+++ b/src/core/lib/channel/channel_stack.h
@@ -131,7 +131,7 @@ typedef struct {
argument. */
grpc_error *(*init_call_elem)(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args);
+ const grpc_call_element_args *args);
void (*set_pollset_or_pollset_set)(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
grpc_polling_entity *pollent);
diff --git a/src/core/lib/channel/compress_filter.c b/src/core/lib/channel/compress_filter.c
index c860d60d8811d905870336f30797f246d838ac80..0027c44e8a1b1571d2bdcf0bf84084daf96a1fca 100644
--- a/src/core/lib/channel/compress_filter.c
+++ b/src/core/lib/channel/compress_filter.c
@@ -272,7 +272,7 @@ static void compress_start_transport_stream_op(grpc_exec_ctx *exec_ctx,
/* Constructor for call_data */
static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
/* grab pointers to our data from the call element */
call_data *calld = elem->call_data;
diff --git a/src/core/lib/channel/connected_channel.c b/src/core/lib/channel/connected_channel.c
index 068c61c92a8ea196aa25670954da49609095404d..29796f7ca7e96546c770cafb2d1d4360198eac01 100644
--- a/src/core/lib/channel/connected_channel.c
+++ b/src/core/lib/channel/connected_channel.c
@@ -83,7 +83,7 @@ static void con_start_transport_op(grpc_exec_ctx *exec_ctx,
/* Constructor for call_data */
static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
call_data *calld = elem->call_data;
channel_data *chand = elem->channel_data;
int r = grpc_transport_init_stream(
diff --git a/src/core/lib/channel/deadline_filter.c b/src/core/lib/channel/deadline_filter.c
index bc9a2effc28c6fc87ba1c048216c95605e5f9fc1..720cfb44e2790326c54c53af2bb4f39cf4bfed8f 100644
--- a/src/core/lib/channel/deadline_filter.c
+++ b/src/core/lib/channel/deadline_filter.c
@@ -244,7 +244,7 @@ typedef struct server_call_data {
// Constructor for call_data. Used for both client and server filters.
static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
grpc_call_element* elem,
- grpc_call_element_args* args) {
+ const grpc_call_element_args* args) {
// Note: size of call data is different between client and server.
memset(elem->call_data, 0, elem->filter->sizeof_call_data);
grpc_deadline_state_init(exec_ctx, elem, args->call_stack);
diff --git a/src/core/lib/channel/http_client_filter.c b/src/core/lib/channel/http_client_filter.c
index 49a2a980e0d09d4fa2c60650021ead352d230651..c031533dd867a65e4028dd63d8935ffc84c84fec 100644
--- a/src/core/lib/channel/http_client_filter.c
+++ b/src/core/lib/channel/http_client_filter.c
@@ -386,7 +386,7 @@ static void hc_start_transport_op(grpc_exec_ctx *exec_ctx,
/* Constructor for call_data */
static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
call_data *calld = elem->call_data;
calld->on_done_recv_initial_metadata = NULL;
calld->on_done_recv_trailing_metadata = NULL;
diff --git a/src/core/lib/channel/http_server_filter.c b/src/core/lib/channel/http_server_filter.c
index bb185351a8e2b61238ca649853e4db4cff9209b9..a6946ef9f3aae24457d718c2ac94117cb07eceb8 100644
--- a/src/core/lib/channel/http_server_filter.c
+++ b/src/core/lib/channel/http_server_filter.c
@@ -343,7 +343,7 @@ static void hs_start_transport_op(grpc_exec_ctx *exec_ctx,
/* Constructor for call_data */
static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
/* grab pointers to our data from the call element */
call_data *calld = elem->call_data;
/* initialize members */
diff --git a/src/core/lib/channel/message_size_filter.c b/src/core/lib/channel/message_size_filter.c
index 5e22860cfb74231b9e6ae53518e0cdc2216779d2..22938c64b5a9b35960f8de6e202919396f19e0aa 100644
--- a/src/core/lib/channel/message_size_filter.c
+++ b/src/core/lib/channel/message_size_filter.c
@@ -166,7 +166,7 @@ static void start_transport_stream_op(grpc_exec_ctx* exec_ctx,
// Constructor for call_data.
static grpc_error* init_call_elem(grpc_exec_ctx* exec_ctx,
grpc_call_element* elem,
- grpc_call_element_args* args) {
+ const grpc_call_element_args* args) {
channel_data* chand = elem->channel_data;
call_data* calld = elem->call_data;
calld->next_recv_message_ready = NULL;
diff --git a/src/core/lib/security/transport/client_auth_filter.c b/src/core/lib/security/transport/client_auth_filter.c
index b9bbe1b30438bf44fdb08372302d5dd5915876e2..a23082a86678ad0df1a6000b6421cedde0223055 100644
--- a/src/core/lib/security/transport/client_auth_filter.c
+++ b/src/core/lib/security/transport/client_auth_filter.c
@@ -302,7 +302,7 @@ static void auth_start_transport_op(grpc_exec_ctx *exec_ctx,
/* Constructor for call_data */
static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
call_data *calld = elem->call_data;
memset(calld, 0, sizeof(*calld));
return GRPC_ERROR_NONE;
diff --git a/src/core/lib/security/transport/server_auth_filter.c b/src/core/lib/security/transport/server_auth_filter.c
index 36e81d6501c824f35c282853993abc44f16eb8a3..14619d97caf1ff8d7ab3f0ac6ef18700de9f1437 100644
--- a/src/core/lib/security/transport/server_auth_filter.c
+++ b/src/core/lib/security/transport/server_auth_filter.c
@@ -197,7 +197,7 @@ static void auth_start_transport_op(grpc_exec_ctx *exec_ctx,
/* Constructor for call_data */
static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
/* grab pointers to our data from the call element */
call_data *calld = elem->call_data;
channel_data *chand = elem->channel_data;
diff --git a/src/core/lib/surface/lame_client.c b/src/core/lib/surface/lame_client.c
index 48de0e1d5bddef8384fa616df69d94f622dfefe1..49bc4c114b37afcc696b88cc98986321e7846af3 100644
--- a/src/core/lib/surface/lame_client.c
+++ b/src/core/lib/surface/lame_client.c
@@ -122,7 +122,7 @@ static void lame_start_transport_op(grpc_exec_ctx *exec_ctx,
static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
call_data *calld = elem->call_data;
gpr_atm_no_barrier_store(&calld->filled_metadata, 0);
return GRPC_ERROR_NONE;
diff --git a/src/core/lib/surface/server.c b/src/core/lib/surface/server.c
index 6ab1c0d94d45deb9ba0a7fe7c1367fbfe7fc3b78..e936e2015cfb32e23e8044c166e3efcc4e1d0da6 100644
--- a/src/core/lib/surface/server.c
+++ b/src/core/lib/surface/server.c
@@ -879,7 +879,7 @@ static void channel_connectivity_changed(grpc_exec_ctx *exec_ctx, void *cd,
static grpc_error *init_call_elem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
call_data *calld = elem->call_data;
channel_data *chand = elem->channel_data;
memset(calld, 0, sizeof(call_data));
diff --git a/test/cpp/microbenchmarks/bm_call_create.cc b/test/cpp/microbenchmarks/bm_call_create.cc
index 8fe69514f687f0fc0c29fe0a570d281d7df4d6e5..7a151c57a57266b45291d41f86218c81eec5e2d5 100644
--- a/test/cpp/microbenchmarks/bm_call_create.cc
+++ b/test/cpp/microbenchmarks/bm_call_create.cc
@@ -140,7 +140,7 @@ static void StartTransportOp(grpc_exec_ctx *exec_ctx,
static grpc_error *InitCallElem(grpc_exec_ctx *exec_ctx,
grpc_call_element *elem,
- grpc_call_element_args *args) {
+ const grpc_call_element_args *args) {
return GRPC_ERROR_NONE;
}