diff --git a/components/esp_system/port/arch/riscv/panic_arch.c b/components/esp_system/port/arch/riscv/panic_arch.c
index 1607dd0e3c..f34f22fcfe 100644
--- a/components/esp_system/port/arch/riscv/panic_arch.c
+++ b/components/esp_system/port/arch/riscv/panic_arch.c
@@ -1,17 +1,9 @@
+/*
+ * SPDX-FileCopyrightText: 2020-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
-// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 #include <stdio.h>
 
 #include "esp_spi_flash.h"
diff --git a/components/esp_system/port/arch/xtensa/panic_arch.c b/components/esp_system/port/arch/xtensa/panic_arch.c
index 0eadb67c97..66d995c820 100644
--- a/components/esp_system/port/arch/xtensa/panic_arch.c
+++ b/components/esp_system/port/arch/xtensa/panic_arch.c
@@ -1,16 +1,9 @@
-// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
+/*
+ * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 #include "freertos/xtensa_context.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
@@ -44,6 +37,7 @@ void panic_print_registers(const void *f, int core)
 {
     XtExcFrame *frame = (XtExcFrame *) f;
     int *regs = (int *)frame;
+    (void)regs;
 
     const char *sdesc[] = {
         "PC      ", "PS      ", "A0      ", "A1      ", "A2      ", "A3      ", "A4      ", "A5      ",
@@ -115,6 +109,7 @@ static void print_illegal_instruction_details(const void *f)
         return;
     }
     volatile uint32_t *pepc = (uint32_t *)epc;
+    (void)pepc;
 
     panic_print_str("Memory dump at 0x");
     panic_print_hex(epc);
diff --git a/tools/ci/check_copyright_ignore.txt b/tools/ci/check_copyright_ignore.txt
index 36bb310952..3d4252ed99 100644
--- a/tools/ci/check_copyright_ignore.txt
+++ b/tools/ci/check_copyright_ignore.txt
@@ -1136,10 +1136,8 @@ components/esp_system/include/esp_task_wdt.h
 components/esp_system/int_wdt.c
 components/esp_system/panic.c
 components/esp_system/port/arch/riscv/expression_with_stack.c
-components/esp_system/port/arch/riscv/panic_arch.c
 components/esp_system/port/arch/xtensa/debug_helpers.c
 components/esp_system/port/arch/xtensa/expression_with_stack.c
-components/esp_system/port/arch/xtensa/panic_arch.c
 components/esp_system/port/arch/xtensa/trax.c
 components/esp_system/port/brownout.c
 components/esp_system/port/include/esp_clk_internal.h