diff --git a/arch/frv/kernel/setup.c b/arch/frv/kernel/setup.c
index ef6865f0b9792a1ac199127f73aba068d426b410..767ebb55bd83d7e763b38d719aee47728f037052 100644
--- a/arch/frv/kernel/setup.c
+++ b/arch/frv/kernel/setup.c
@@ -790,12 +790,10 @@ void __init setup_arch(char **cmdline_p)
 #ifndef CONFIG_GDBSTUB_UART0
 	__reg(UART0_BASE + UART_IER * 8) = 0;
 	early_serial_setup(&__frv_uart0);
-//	register_serial(&__frv_uart0);
 #endif
 #ifndef CONFIG_GDBSTUB_UART1
 	__reg(UART1_BASE + UART_IER * 8) = 0;
 	early_serial_setup(&__frv_uart1);
-//	register_serial(&__frv_uart1);
 #endif
 
 #if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
diff --git a/arch/xtensa/platform-iss/console.c b/arch/xtensa/platform-iss/console.c
index 9e2b53f6a90740dde96fb39cda854705715414cd..4fbddf92a921e9d0c32b33e259c5a5f1026c72a2 100644
--- a/arch/xtensa/platform-iss/console.c
+++ b/arch/xtensa/platform-iss/console.c
@@ -198,9 +198,6 @@ static int rs_read_proc(char *page, char **start, off_t off, int count,
 }
 
 
-int register_serial(struct serial_struct*);
-void unregister_serial(int);
-
 static struct tty_operations serial_ops = {
 	.open = rs_open,
 	.close = rs_close,
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index 777bc499bbbd103fcb9246b9b65c72a1514a0eb6..2a36561eec68dab6efc8e690167df7a78668f1eb 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -1973,10 +1973,6 @@ static _INLINE_ void show_serial_version(void)
 }
 
 
-int register_serial(struct serial_struct *req);
-void unregister_serial(int line);
-
-
 static struct tty_operations serial_ops = {
 	.open = rs_open,
 	.close = rs_close,