Make subsys API/descriptor structs static const to save RAM

subsys/bluetooth/audio/ascs.c

@@ -1099,7 +1099,7 @@ static void ascs_iso_disconnected(struct bt_iso_chan *chan, uint8_t reason)
 	}
 }
 
-static struct bt_iso_chan_ops ascs_iso_ops = {
+static const struct bt_iso_chan_ops ascs_iso_ops = {
 #if defined(CONFIG_BT_AUDIO_RX)
 	.recv = ascs_iso_recv,
 #endif /* CONFIG_BT_AUDIO_RX */

subsys/bluetooth/audio/bap_broadcast_sink.c

@@ -435,7 +435,7 @@ static void broadcast_sink_iso_disconnected(struct bt_iso_chan *chan,
 	}
 }
 
-static struct bt_iso_chan_ops broadcast_sink_iso_ops = {
+static const struct bt_iso_chan_ops broadcast_sink_iso_ops = {
 	.recv		= broadcast_sink_iso_recv,
 	.connected	= broadcast_sink_iso_connected,
 	.disconnected	= broadcast_sink_iso_disconnected,

subsys/bluetooth/audio/bap_broadcast_source.c

@@ -238,7 +238,7 @@ static void broadcast_source_iso_disconnected(struct bt_iso_chan *chan, uint8_t
 	}
 }
 
-static struct bt_iso_chan_ops broadcast_source_iso_ops = {
+static const struct bt_iso_chan_ops broadcast_source_iso_ops = {
 	.sent = broadcast_source_iso_sent,
 	.connected = broadcast_source_iso_connected,
 	.disconnected = broadcast_source_iso_disconnected,

subsys/bluetooth/audio/bap_unicast_client.c

@@ -430,7 +430,7 @@ static void unicast_client_iso_disconnected(struct bt_iso_chan *chan, uint8_t re
 	}
 }
 
-static struct bt_iso_chan_ops unicast_client_iso_ops = {
+static const struct bt_iso_chan_ops unicast_client_iso_ops = {
 #if defined(CONFIG_BT_AUDIO_RX)
 	.recv = unicast_client_ep_iso_recv,
 #endif /* CONFIG_BT_AUDIO_RX */

subsys/bluetooth/audio/cap_stream.c

@@ -260,7 +260,7 @@ static void cap_stream_disconnected_cb(struct bt_bap_stream *bap_stream, uint8_t
 	}
 }
 
-static struct bt_bap_stream_ops bap_stream_ops = {
+static const struct bt_bap_stream_ops bap_stream_ops = {
 #if defined(CONFIG_BT_BAP_UNICAST)
 	.configured = cap_stream_configured_cb,
 	.qos_set = cap_stream_qos_set_cb,

subsys/bluetooth/host/classic/avrcp_cover_art.c

@@ -189,7 +189,7 @@ static void tg_bip_transport_disconnected(struct bt_bip *bip)
 	}
 }
 
-static struct bt_bip_transport_ops tg_bip_transport_ops = {
+static const struct bt_bip_transport_ops tg_bip_transport_ops = {
 	.connected = tg_bip_transport_connected,
 	.disconnected = tg_bip_transport_disconnected,
 };
@@ -567,7 +567,7 @@ static void ct_bip_transport_disconnected(struct bt_bip *bip)
 	}
 }
 
-static struct bt_bip_transport_ops ct_bip_transport_ops = {
+static const struct bt_bip_transport_ops ct_bip_transport_ops = {
 	.connected = ct_bip_transport_connected,
 	.disconnected = ct_bip_transport_disconnected,
 };

subsys/bluetooth/host/classic/bip.c

@@ -96,7 +96,7 @@ static void bip_rfcomm_disconnected(struct bt_goep *goep)
 	}
 }
 
-static struct bt_goep_transport_ops bip_rfcomm_ops = {
+static const struct bt_goep_transport_ops bip_rfcomm_ops = {
 	.connected = bip_rfcomm_connected,
 	.disconnected = bip_rfcomm_disconnected,
 };
@@ -229,7 +229,7 @@ static void bip_l2cap_disconnected(struct bt_goep *goep)
 	}
 }
 
-static struct bt_goep_transport_ops bip_l2cap_ops = {
+static const struct bt_goep_transport_ops bip_l2cap_ops = {
 	.connected = bip_l2cap_connected,
 	.disconnected = bip_l2cap_disconnected,
 };

subsys/bluetooth/host/classic/goep.c

@@ -95,7 +95,7 @@ static void goep_rfcomm_disconnected(struct bt_rfcomm_dlc *dlc)
 	}
 }
 
-static struct bt_rfcomm_dlc_ops goep_rfcomm_ops = {
+static const struct bt_rfcomm_dlc_ops goep_rfcomm_ops = {
 	.recv = goep_rfcomm_recv,
 	.connected = goep_rfcomm_connected,
 	.disconnected = goep_rfcomm_disconnected,

subsys/dap/dap_backend_usb.c

@@ -202,7 +202,7 @@ static int dap_func_init(struct usbd_class_data *c_data)
 	return 0;
 }
 
-struct usbd_class_api dap_func_api = {
+static const struct usbd_class_api dap_func_api = {
 	.request = dap_func_request_handler,
 	.get_desc = dap_func_get_desc,
 	.enable = dap_func_enable,
@@ -211,7 +211,7 @@ struct usbd_class_api dap_func_api = {
 };
 
 #define DAP_FUNC_DESCRIPTOR_DEFINE(n, _)					\
-static struct dap_func_desc dap_func_desc_##n = {				\
+static const struct dap_func_desc dap_func_desc_##n = {				\
 	/* Interface descriptor 0 */						\
 	.if0 = {								\
 		.bLength = sizeof(struct usb_if_descriptor),			\

subsys/debug/coredump/coredump_backend_flash_partition.c

@@ -624,7 +624,7 @@ static int coredump_flash_backend_cmd(enum coredump_cmd_id cmd_id,
 }
 
 
-struct coredump_backend_api coredump_backend_flash_partition = {
+static const struct coredump_backend_api coredump_backend_flash_partition = {
 	.start = coredump_flash_backend_start,
 	.end = coredump_flash_backend_end,
 	.buffer_output = coredump_flash_backend_buffer_output,

subsys/debug/coredump/coredump_backend_in_memory.c

@@ -185,7 +185,7 @@ static int coredump_in_memory_backend_cmd(enum coredump_cmd_id cmd_id,
 	return 0;
 }
 
-struct coredump_backend_api coredump_backend_in_memory = {
+static const struct coredump_backend_api coredump_backend_in_memory = {
 	.start = coredump_in_memory_backend_start,
 	.end = coredump_in_memory_backend_end,
 	.buffer_output = coredump_in_memory_backend_buffer_output,

subsys/debug/coredump/coredump_backend_intel_adsp_mem_window.c

@@ -110,7 +110,7 @@ static int coredump_mem_window_backend_cmd(enum coredump_cmd_id cmd_id,
 	return ret;
 }
 
-struct coredump_backend_api coredump_backend_intel_adsp_mem_window = {
+static const struct coredump_backend_api coredump_backend_intel_adsp_mem_window = {
 	.start = coredump_mem_window_backend_start,
 	.end = coredump_mem_window_backend_end,
 	.buffer_output = coredump_mem_window_backend_buffer_output,

subsys/debug/coredump/coredump_backend_logging.c

@@ -119,7 +119,7 @@ static int coredump_logging_backend_cmd(enum coredump_cmd_id cmd_id,
 }
 
 
-struct coredump_backend_api coredump_backend_logging = {
+static const struct coredump_backend_api coredump_backend_logging = {
 	.start = coredump_logging_backend_start,
 	.end = coredump_logging_backend_end,
 	.buffer_output = coredump_logging_backend_buffer_output,

subsys/emul/espi/emul_espi_host.c

@@ -234,7 +234,7 @@ uintptr_t emul_espi_host_get_acpi_shm(const struct device *espi_dev)
 #endif
 
 /* Device instantiation */
-static struct emul_espi_device_api ap_emul_api = {
+static const struct emul_espi_device_api ap_emul_api = {
 	.set_vw = emul_host_set_vw,
 	.get_vw = emul_host_get_vw,
 	.get_acpi_shm = emul_espi_dev_get_acpi_shm,

subsys/fs/fuse_fs_access.c

@@ -213,7 +213,7 @@ static int ffa_unlink_top(const char *path)
 	return nsi_errno_to_mid(-err);
 }
 
-struct ffa_op_callbacks op_callbacks = {
+static const struct ffa_op_callbacks op_callbacks = {
 	.readdir_start = ffa_readdir_start,
 	.readdir_read_next = ffa_readdir_read_next,
 	.readdir_end = ffa_readdir_end,

subsys/logging/backends/log_backend_ipc_service.c

@@ -73,7 +73,7 @@ static int backend_ipc_service_init(struct log_multidomain_backend *backend_remo
 	return err;
 }
 
-struct log_multidomain_backend_transport_api log_backend_ipc_service_transport_api = {
+static const struct log_multidomain_backend_transport_api log_backend_ipc_service_transport_api = {
 	.init = backend_ipc_service_init,
 	.send = backend_ipc_service_send
 };

subsys/logging/log_link_ipc_service.c

@@ -76,7 +76,7 @@ static int link_ipc_service_init(struct log_multidomain_link *link_remote)
 	return err;
 }
 
-struct log_multidomain_link_transport_api log_link_ipc_service_transport_api = {
+static const struct log_multidomain_link_transport_api log_link_ipc_service_transport_api = {
 	.init = link_ipc_service_init,
 	.send = link_ipc_service_send
 };

subsys/logging/log_multidomain_link.c

@@ -317,7 +317,7 @@ static int link_remote_set_runtime_level(const struct log_link *link,
 	return 0;
 }
 
-struct log_link_api log_multidomain_link_api = {
+static const struct log_link_api log_multidomain_link_api = {
 	.initiate = link_remote_initiate,
 	.activate = link_remote_activate,
 	.get_domain_name = link_remote_get_domain_name,

subsys/net/l2/dummy/any/any.c

@@ -74,7 +74,7 @@ static enum net_verdict any_recv(struct net_if *iface, struct net_pkt *pkt)
 	return verdict;
 }
 
-static struct dummy_api any_api = {
+static const struct dummy_api any_api = {
 	.iface_api.init = any_iface_init,
 	.recv = any_recv,
 };

subsys/pmci/mctp/mctp_usb.c

@@ -384,7 +384,7 @@ static int mctp_usb_class_init(struct usbd_class_data *const c_data)
 	return 0;
 }
 
-struct usbd_class_api mctp_usb_class_api = {
+static const struct usbd_class_api mctp_usb_class_api = {
 	.request = mctp_usb_class_request,
 	.enable = mctp_usb_class_enable,
 	.disable = mctp_usb_class_disable,

subsys/settings/src/settings_nvs.c

@@ -34,7 +34,7 @@ static int settings_nvs_save(struct settings_store *cs, const char *name,
 			     const char *value, size_t val_len);
 static void *settings_nvs_storage_get(struct settings_store *cs);
 
-static struct settings_store_itf settings_nvs_itf = {
+static const struct settings_store_itf settings_nvs_itf = {
 	.csi_load = settings_nvs_load,
 	.csi_save = settings_nvs_save,
 	.csi_storage_get = settings_nvs_storage_get

subsys/settings/src/settings_zms.c

@@ -38,7 +38,7 @@ static void *settings_zms_storage_get(struct settings_store *cs);
 static int settings_zms_get_last_hash_ids(struct settings_zms *cf);
 static ssize_t settings_zms_get_val_len(struct settings_store *cs, const char *name);
 
-static struct settings_store_itf settings_zms_itf = {.csi_load = settings_zms_load,
+static const struct settings_store_itf settings_zms_itf = {.csi_load = settings_zms_load,
 						     .csi_load_one = settings_zms_load_one,
 						     .csi_save = settings_zms_save,
 						     .csi_storage_get = settings_zms_storage_get,

subsys/tracing/tracing_backend_usb.c

@@ -158,15 +158,15 @@ static int tracing_func_init(struct usbd_class_data *c_data)
 	return 0;
 }
 
-struct usbd_class_api tracing_func_api = {
+static const struct usbd_class_api tracing_func_api = {
 	.request = tracing_func_request_handler,
 	.get_desc = tracing_func_get_desc,
 	.enable = tracing_func_enable,
 	.disable = tracing_func_disable,
 	.init = tracing_func_init,
 };
 
-static struct tracing_func_desc func_desc = {
+static const struct tracing_func_desc func_desc = {
 	.if0 = {
 		.bLength = sizeof(struct usb_if_descriptor),
 		.bDescriptorType = USB_DESC_INTERFACE,

subsys/usb/device/class/dfu/usb_dfu.c

@@ -150,7 +150,7 @@ struct dev_dfu_mode_descriptor {
 
 
 USBD_DEVICE_DESCR_DEFINE(secondary)
-struct dev_dfu_mode_descriptor dfu_mode_desc = {
+static const struct dev_dfu_mode_descriptor dfu_mode_desc = {
 	/* Device descriptor */
 	.device_descriptor = {
 		.bLength = sizeof(struct usb_device_descriptor),
@@ -261,7 +261,7 @@ struct usb_string_desription {
 } __packed;
 
 USBD_STRING_DESCR_DEFINE(secondary)
-struct usb_string_desription string_descr = {
+static const struct usb_string_desription string_descr = {
 	.lang_descr = {
 		.bLength = sizeof(struct usb_string_descriptor),
 		.bDescriptorType = USB_DESC_STRING,

subsys/usb/device_next/class/loopback.c

@@ -288,7 +288,7 @@ static int lb_init(struct usbd_class_data *c_data)
 	return 0;
 }
 
-struct usbd_class_api lb_api = {
+static const struct usbd_class_api lb_api = {
 	.update = lb_update,
 	.control_to_host = lb_control_to_host,
 	.control_to_dev = lb_control_to_dev,

subsys/usb/device_next/class/usbd_cdc_acm.c

@@ -1155,7 +1155,7 @@ static DEVICE_API(uart, cdc_acm_uart_api) = {
 #endif
 };
 
-struct usbd_class_api usbd_cdc_acm_api = {
+static const struct usbd_class_api usbd_cdc_acm_api = {
 	.request = usbd_cdc_acm_request,
 	.update = usbd_cdc_acm_update,
 	.enable = usbd_cdc_acm_enable,

subsys/usb/device_next/class/usbd_dfu.c

@@ -628,7 +628,7 @@ static int runtime_mode_init(struct usbd_class_data *const c_data)
 	return 0;
 }
 
-struct usbd_class_api runtime_mode_api = {
+static const struct usbd_class_api runtime_mode_api = {
 	.control_to_host = runtime_mode_control_to_host,
 	.control_to_dev = runtime_mode_control_to_dev,
 	.get_desc = runtime_mode_get_desc,
@@ -783,7 +783,7 @@ static int dfu_mode_init(struct usbd_class_data *const c_data)
 	return data->image == NULL ? -EINVAL : 0;
 }
 
-struct usbd_class_api dfu_api = {
+static const struct usbd_class_api dfu_api = {
 	.control_to_host = dfu_mode_control_to_host,
 	.control_to_dev = dfu_mode_control_to_dev,
 	.update = dfu_mode_update,

subsys/usb/device_next/class/usbd_hid.c

@@ -738,7 +738,7 @@ static int hid_device_init(const struct device *dev)
 	return 0;
 }
 
-struct usbd_class_api usbd_hid_api = {
+static const struct usbd_class_api usbd_hid_api = {
 	.request = usbd_hid_request,
 	.update = NULL,
 	.sof = usbd_hid_sof,

subsys/usb/device_next/class/usbd_msc.c

@@ -983,7 +983,7 @@ const static struct usb_desc_header *msc_bot_hs_desc_##n[] = {			\
 };
 
 
-struct usbd_class_api msc_bot_api = {
+static const struct usbd_class_api msc_bot_api = {
 	.feature_halt = msc_bot_feature_halt,
 	.control_to_dev = msc_bot_control_to_dev,
 	.control_to_host = msc_bot_control_to_host,

subsys/usb/device_next/class/usbd_uac2.c

@@ -939,7 +939,7 @@ static int uac2_init(struct usbd_class_data *const c_data)
 	return 0;
 }
 
-struct usbd_class_api uac2_api = {
+static const struct usbd_class_api uac2_api = {
 	.update = uac2_update,
 	.control_to_dev = uac2_control_to_dev,
 	.control_to_host = uac2_control_to_host,