diff --git a/libc/kernel/uapi/linux/serial.h b/libc/kernel/uapi/linux/serial.h
new file mode 100644
index 0000000..e622682
--- /dev/null
+++ b/libc/kernel/uapi/linux/serial.h
@@ -0,0 +1,116 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _UAPI_LINUX_SERIAL_H
+#define _UAPI_LINUX_SERIAL_H
+#include <linux/types.h>
+#include <linux/tty_flags.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct serial_struct {
+ int type;
+ int line;
+ unsigned int port;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int irq;
+ int flags;
+ int xmit_fifo_size;
+ int custom_divisor;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int baud_base;
+ unsigned short close_delay;
+ char io_type;
+ char reserved_char[1];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int hub6;
+ unsigned short closing_wait;
+ unsigned short closing_wait2;
+ unsigned char *iomem_base;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ unsigned short iomem_reg_shift;
+ unsigned int port_high;
+ unsigned long iomap_base;
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ASYNC_CLOSING_WAIT_INF 0
+#define ASYNC_CLOSING_WAIT_NONE 65535
+#define PORT_UNKNOWN 0
+#define PORT_8250 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define PORT_16450 2
+#define PORT_16550 3
+#define PORT_16550A 4
+#define PORT_CIRRUS 5
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define PORT_16650 6
+#define PORT_16650V2 7
+#define PORT_16750 8
+#define PORT_STARTECH 9
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define PORT_16C950 10
+#define PORT_16654 11
+#define PORT_16850 12
+#define PORT_RSA 13
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define PORT_MAX 13
+#define SERIAL_IO_PORT 0
+#define SERIAL_IO_HUB6 1
+#define SERIAL_IO_MEM 2
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define UART_CLEAR_FIFO 0x01
+#define UART_USE_FIFO 0x02
+#define UART_STARTECH 0x04
+#define UART_NATSEMI 0x08
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct serial_multiport_struct {
+ int irq;
+ int port1;
+ unsigned char mask1, match1;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int port2;
+ unsigned char mask2, match2;
+ int port3;
+ unsigned char mask3, match3;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int port4;
+ unsigned char mask4, match4;
+ int port_monitor;
+ int reserved[32];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+struct serial_icounter_struct {
+ int cts, dsr, rng, dcd;
+ int rx, tx;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int frame, overrun, parity, brk;
+ int buf_overrun;
+ int reserved[9];
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct serial_rs485 {
+ __u32 flags;
+#define SER_RS485_ENABLED (1 << 0)
+#define SER_RS485_RTS_ON_SEND (1 << 1)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define SER_RS485_RTS_AFTER_SEND (1 << 2)
+#define SER_RS485_RX_DURING_TX (1 << 4)
+ __u32 delay_rts_before_send;
+ __u32 delay_rts_after_send;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 padding[5];
+};
+#endif