diff --git a/libc/kernel/android/README.TXT b/libc/kernel/android/README.TXT
new file mode 100644
index 0000000..dab5f42
--- /dev/null
+++ b/libc/kernel/android/README.TXT
@@ -0,0 +1,6 @@
+The files under this directory are android kernel uapi header files that
+exist in android kernels, but have not been upstreamed into the regular
+kernel.
+
+None of these files will get updated automatically, and are frozen at their
+current value.
diff --git a/libc/kernel/android/uapi/linux/compiler.h b/libc/kernel/android/uapi/linux/compiler.h
new file mode 100644
index 0000000..8e89655
--- /dev/null
+++ b/libc/kernel/android/uapi/linux/compiler.h
@@ -0,0 +1,18 @@
+#ifndef _UAPI_LINUX_COMPILER_H
+#define _UAPI_LINUX_COMPILER_H
+
+/*
+ * This file is not currently in the Linux kernel tree.
+ * Upstream uapi headers refer to <linux/compiler.h> but there is
+ * no such uapi file. We've sent this upstream, and are optimistically
+ * adding it to bionic in the meantime. This should be replaced by
+ * a scrubbed header from external/kernel-headers when possible.
+ *
+ * An alternative to this file is to check in a symbolic link to the
+ * non-uapi <linux/compiler.h>. That's fine for building bionic too.
+ */
+
+#define __user
+#define __force
+
+#endif /* _UAPI_LINUX_COMPILER_H */
diff --git a/libc/kernel/android/uapi/linux/keychord.h b/libc/kernel/android/uapi/linux/keychord.h
new file mode 100644
index 0000000..5fd3912
--- /dev/null
+++ b/libc/kernel/android/uapi/linux/keychord.h
@@ -0,0 +1,31 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_KEYCHORD_H_
+#define _UAPI_LINUX_KEYCHORD_H_
+#include <linux/input.h>
+#define KEYCHORD_VERSION 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct input_keychord {
+  __u16 version;
+  __u16 id;
+  __u16 count;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u16 keycodes[];
+};
+#endif
diff --git a/libc/kernel/android/uapi/linux/netfilter_ipv4/ipt_ULOG.h b/libc/kernel/android/uapi/linux/netfilter_ipv4/ipt_ULOG.h
new file mode 100644
index 0000000..ee6a557
--- /dev/null
+++ b/libc/kernel/android/uapi/linux/netfilter_ipv4/ipt_ULOG.h
@@ -0,0 +1,55 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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 _IPT_ULOG_H
+#define _IPT_ULOG_H
+#ifndef NETLINK_NFLOG
+#define NETLINK_NFLOG 5
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#endif
+#define ULOG_DEFAULT_NLGROUP 1
+#define ULOG_DEFAULT_QTHRESHOLD 1
+#define ULOG_MAC_LEN 80
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ULOG_PREFIX_LEN 32
+#define ULOG_MAX_QLEN 50
+struct ipt_ulog_info {
+  unsigned int nl_group;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  size_t copy_range;
+  size_t qthreshold;
+  char prefix[ULOG_PREFIX_LEN];
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+typedef struct ulog_packet_msg {
+  unsigned long mark;
+  long timestamp_sec;
+  long timestamp_usec;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  unsigned int hook;
+  char indev_name[IFNAMSIZ];
+  char outdev_name[IFNAMSIZ];
+  size_t data_len;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  char prefix[ULOG_PREFIX_LEN];
+  unsigned char mac_len;
+  unsigned char mac[ULOG_MAC_LEN];
+  unsigned char payload[0];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+} ulog_packet_msg_t;
+#endif
diff --git a/libc/kernel/android/uapi/linux/usb/f_accessory.h b/libc/kernel/android/uapi/linux/usb/f_accessory.h
new file mode 100644
index 0000000..75e017c
--- /dev/null
+++ b/libc/kernel/android/uapi/linux/usb/f_accessory.h
@@ -0,0 +1,53 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_USB_F_ACCESSORY_H
+#define _UAPI_LINUX_USB_F_ACCESSORY_H
+#define USB_ACCESSORY_VENDOR_ID 0x18D1
+#define USB_ACCESSORY_PRODUCT_ID 0x2D00
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define USB_ACCESSORY_ADB_PRODUCT_ID 0x2D01
+#define ACCESSORY_STRING_MANUFACTURER 0
+#define ACCESSORY_STRING_MODEL 1
+#define ACCESSORY_STRING_DESCRIPTION 2
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ACCESSORY_STRING_VERSION 3
+#define ACCESSORY_STRING_URI 4
+#define ACCESSORY_STRING_SERIAL 5
+#define ACCESSORY_GET_PROTOCOL 51
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ACCESSORY_SEND_STRING 52
+#define ACCESSORY_START 53
+#define ACCESSORY_REGISTER_HID 54
+#define ACCESSORY_UNREGISTER_HID 55
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ACCESSORY_SET_HID_REPORT_DESC 56
+#define ACCESSORY_SEND_HID_EVENT 57
+#define ACCESSORY_SET_AUDIO_MODE 58
+#define ACCESSORY_GET_STRING_MANUFACTURER _IOW('M', 1, char[256])
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ACCESSORY_GET_STRING_MODEL _IOW('M', 2, char[256])
+#define ACCESSORY_GET_STRING_DESCRIPTION _IOW('M', 3, char[256])
+#define ACCESSORY_GET_STRING_VERSION _IOW('M', 4, char[256])
+#define ACCESSORY_GET_STRING_URI _IOW('M', 5, char[256])
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ACCESSORY_GET_STRING_SERIAL _IOW('M', 6, char[256])
+#define ACCESSORY_IS_START_REQUESTED _IO('M', 7)
+#define ACCESSORY_GET_AUDIO_MODE _IO('M', 8)
+#endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
diff --git a/libc/kernel/android/uapi/linux/usb/f_mtp.h b/libc/kernel/android/uapi/linux/usb/f_mtp.h
new file mode 100644
index 0000000..22ec771
--- /dev/null
+++ b/libc/kernel/android/uapi/linux/usb/f_mtp.h
@@ -0,0 +1,43 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_USB_F_MTP_H
+#define _UAPI_LINUX_USB_F_MTP_H
+#include <linux/ioctl.h>
+#include <linux/types.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct mtp_file_range {
+  int fd;
+  loff_t offset;
+  int64_t length;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  uint16_t command;
+  uint32_t transaction_id;
+};
+struct mtp_event {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  size_t length;
+  void * data;
+};
+#define MTP_SEND_FILE _IOW('M', 0, struct mtp_file_range)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MTP_RECEIVE_FILE _IOW('M', 1, struct mtp_file_range)
+#define MTP_SEND_EVENT _IOW('M', 3, struct mtp_event)
+#define MTP_SEND_FILE_WITH_HEADER _IOW('M', 4, struct mtp_file_range)
+#endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
diff --git a/libc/kernel/android/uapi/video/adf.h b/libc/kernel/android/uapi/video/adf.h
new file mode 100644
index 0000000..77203a5
--- /dev/null
+++ b/libc/kernel/android/uapi/video/adf.h
@@ -0,0 +1,180 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_VIDEO_ADF_H_
+#define _UAPI_VIDEO_ADF_H_
+#include <linux/ioctl.h>
+#include <linux/types.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#include <drm/drm_fourcc.h>
+#include <drm/drm_mode.h>
+#define ADF_NAME_LEN 32
+#define ADF_MAX_CUSTOM_DATA_SIZE 4096
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+enum adf_interface_type {
+  ADF_INTF_DSI = 0,
+  ADF_INTF_eDP = 1,
+  ADF_INTF_DPI = 2,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  ADF_INTF_VGA = 3,
+  ADF_INTF_DVI = 4,
+  ADF_INTF_HDMI = 5,
+  ADF_INTF_MEMORY = 6,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  ADF_INTF_TYPE_DEVICE_CUSTOM = 128,
+  ADF_INTF_TYPE_MAX = (~(__u32) 0),
+};
+#define ADF_INTF_FLAG_PRIMARY (1 << 0)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADF_INTF_FLAG_EXTERNAL (1 << 1)
+enum adf_event_type {
+  ADF_EVENT_VSYNC = 0,
+  ADF_EVENT_HOTPLUG = 1,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  ADF_EVENT_DEVICE_CUSTOM = 128,
+  ADF_EVENT_TYPE_MAX = 255,
+};
+struct adf_set_event {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u8 type;
+  __u8 enabled;
+};
+struct adf_event {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u8 type;
+  __u32 length;
+};
+struct adf_vsync_event {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  struct adf_event base;
+  __aligned_u64 timestamp;
+};
+struct adf_hotplug_event {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  struct adf_event base;
+  __u8 connected;
+};
+#define ADF_MAX_PLANES 4
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct adf_buffer_config {
+  __u32 overlay_engine;
+  __u32 w;
+  __u32 h;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u32 format;
+  __s32 fd[ADF_MAX_PLANES];
+  __u32 offset[ADF_MAX_PLANES];
+  __u32 pitch[ADF_MAX_PLANES];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u8 n_planes;
+  __s32 acquire_fence;
+};
+#define ADF_MAX_BUFFERS (4096 / sizeof(struct adf_buffer_config))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct adf_post_config {
+  size_t n_interfaces;
+  __u32 __user * interfaces;
+  size_t n_bufs;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  struct adf_buffer_config __user * bufs;
+  size_t custom_data_size;
+  void __user * custom_data;
+  __s32 complete_fence;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+#define ADF_MAX_INTERFACES (4096 / sizeof(__u32))
+struct adf_simple_buffer_alloc {
+  __u16 w;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u16 h;
+  __u32 format;
+  __s32 fd;
+  __u32 offset;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u32 pitch;
+};
+struct adf_simple_post_config {
+  struct adf_buffer_config buf;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __s32 complete_fence;
+};
+struct adf_attachment_config {
+  __u32 overlay_engine;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u32 interface;
+};
+struct adf_device_data {
+  char name[ADF_NAME_LEN];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  size_t n_attachments;
+  struct adf_attachment_config __user * attachments;
+  size_t n_allowed_attachments;
+  struct adf_attachment_config __user * allowed_attachments;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  size_t custom_data_size;
+  void __user * custom_data;
+};
+#define ADF_MAX_ATTACHMENTS (4096 / sizeof(struct adf_attachment_config))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct adf_interface_data {
+  char name[ADF_NAME_LEN];
+  __u32 type;
+  __u32 id;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u32 flags;
+  __u8 dpms_state;
+  __u8 hotplug_detect;
+  __u16 width_mm;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  __u16 height_mm;
+  struct drm_mode_modeinfo current_mode;
+  size_t n_available_modes;
+  struct drm_mode_modeinfo __user * available_modes;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  size_t custom_data_size;
+  void __user * custom_data;
+};
+#define ADF_MAX_MODES (4096 / sizeof(struct drm_mode_modeinfo))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct adf_overlay_engine_data {
+  char name[ADF_NAME_LEN];
+  size_t n_supported_formats;
+  __u32 __user * supported_formats;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+  size_t custom_data_size;
+  void __user * custom_data;
+};
+#define ADF_MAX_SUPPORTED_FORMATS (4096 / sizeof(__u32))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADF_IOCTL_TYPE 'D'
+#define ADF_IOCTL_NR_CUSTOM 128
+#define ADF_SET_EVENT _IOW(ADF_IOCTL_TYPE, 0, struct adf_set_event)
+#define ADF_BLANK _IOW(ADF_IOCTL_TYPE, 1, __u8)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADF_POST_CONFIG _IOW(ADF_IOCTL_TYPE, 2, struct adf_post_config)
+#define ADF_SET_MODE _IOW(ADF_IOCTL_TYPE, 3, struct drm_mode_modeinfo)
+#define ADF_GET_DEVICE_DATA _IOR(ADF_IOCTL_TYPE, 4, struct adf_device_data)
+#define ADF_GET_INTERFACE_DATA _IOR(ADF_IOCTL_TYPE, 5, struct adf_interface_data)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADF_GET_OVERLAY_ENGINE_DATA _IOR(ADF_IOCTL_TYPE, 6, struct adf_overlay_engine_data)
+#define ADF_SIMPLE_POST_CONFIG _IOW(ADF_IOCTL_TYPE, 7, struct adf_simple_post_config)
+#define ADF_SIMPLE_BUFFER_ALLOC _IOW(ADF_IOCTL_TYPE, 8, struct adf_simple_buffer_alloc)
+#define ADF_ATTACH _IOW(ADF_IOCTL_TYPE, 9, struct adf_attachment_config)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADF_DETACH _IOW(ADF_IOCTL_TYPE, 10, struct adf_attachment_config)
+#endif