diff --git a/libc/kernel/uapi/linux/chio.h b/libc/kernel/uapi/linux/chio.h
new file mode 100644
index 0000000..526ee02
--- /dev/null
+++ b/libc/kernel/uapi/linux/chio.h
@@ -0,0 +1,143 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#define CHET_MT 0
+#define CHET_ST 1
+#define CHET_IE 2
+#define CHET_DT 3
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CHET_V1 4
+#define CHET_V2 5
+#define CHET_V3 6
+#define CHET_V4 7
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct changer_params {
+ int cp_curpicker;
+ int cp_npickers;
+ int cp_nslots;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int cp_nportals;
+ int cp_ndrives;
+};
+struct changer_vendor_params {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int cvp_n1;
+ char cvp_label1[16];
+ int cvp_n2;
+ char cvp_label2[16];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int cvp_n3;
+ char cvp_label3[16];
+ int cvp_n4;
+ char cvp_label4[16];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int reserved[8];
+};
+struct changer_move {
+ int cm_fromtype;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int cm_fromunit;
+ int cm_totype;
+ int cm_tounit;
+ int cm_flags;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+#define CM_INVERT 1
+struct changer_exchange {
+ int ce_srctype;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int ce_srcunit;
+ int ce_fdsttype;
+ int ce_fdstunit;
+ int ce_sdsttype;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int ce_sdstunit;
+ int ce_flags;
+};
+#define CE_INVERT1 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CE_INVERT2 2
+struct changer_position {
+ int cp_type;
+ int cp_unit;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int cp_flags;
+};
+#define CP_INVERT 1
+struct changer_element_status {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int ces_type;
+ unsigned char __user *ces_data;
+};
+#define CESTATUS_FULL 0x01
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CESTATUS_IMPEXP 0x02
+#define CESTATUS_EXCEPT 0x04
+#define CESTATUS_ACCESS 0x08
+#define CESTATUS_EXENAB 0x10
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CESTATUS_INENAB 0x20
+struct changer_get_element {
+ int cge_type;
+ int cge_unit;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int cge_status;
+ int cge_errno;
+ int cge_srctype;
+ int cge_srcunit;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int cge_id;
+ int cge_lun;
+ char cge_pvoltag[36];
+ char cge_avoltag[36];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int cge_flags;
+};
+#define CGE_ERRNO 0x01
+#define CGE_INVERT 0x02
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CGE_SRC 0x04
+#define CGE_IDLUN 0x08
+#define CGE_PVOLTAG 0x10
+#define CGE_AVOLTAG 0x20
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct changer_set_voltag {
+ int csv_type;
+ int csv_unit;
+ char csv_voltag[36];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int csv_flags;
+};
+#define CSV_PVOLTAG 0x01
+#define CSV_AVOLTAG 0x02
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CSV_CLEARTAG 0x04
+#define CHIOMOVE _IOW('c', 1,struct changer_move)
+#define CHIOEXCHANGE _IOW('c', 2,struct changer_exchange)
+#define CHIOPOSITION _IOW('c', 3,struct changer_position)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CHIOGPICKER _IOR('c', 4,int)
+#define CHIOSPICKER _IOW('c', 5,int)
+#define CHIOGPARAMS _IOR('c', 6,struct changer_params)
+#define CHIOGSTATUS _IOW('c', 8,struct changer_element_status)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define CHIOGELEM _IOW('c',16,struct changer_get_element)
+#define CHIOINITELEM _IO('c',17)
+#define CHIOSVOLTAG _IOW('c',18,struct changer_set_voltag)
+#define CHIOGVPARAMS _IOR('c',19,struct changer_vendor_params)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */