diff --git a/libc/kernel/common/linux/genlock.h b/libc/kernel/common/linux/genlock.h
new file mode 100644
index 0000000..36a78dc
--- /dev/null
+++ b/libc/kernel/common/linux/genlock.h
@@ -0,0 +1,46 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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 _GENLOCK_H_
+#define _GENLOCK_H_
+#define GENLOCK_UNLOCK 0
+#define GENLOCK_WRLOCK 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define GENLOCK_RDLOCK 2
+#define GENLOCK_NOBLOCK (1 << 0)
+#define GENLOCK_WRITE_TO_READ (1 << 1)
+struct genlock_lock {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int fd;
+ int op;
+ int flags;
+ int timeout;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+#define GENLOCK_IOC_MAGIC 'G'
+#define GENLOCK_IOC_NEW _IO(GENLOCK_IOC_MAGIC, 0)
+#define GENLOCK_IOC_EXPORT _IOR(GENLOCK_IOC_MAGIC, 1,   struct genlock_lock)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define GENLOCK_IOC_ATTACH _IOW(GENLOCK_IOC_MAGIC, 2,   struct genlock_lock)
+#define GENLOCK_IOC_LOCK _IOW(GENLOCK_IOC_MAGIC, 3,   struct genlock_lock)
+#define GENLOCK_IOC_RELEASE _IO(GENLOCK_IOC_MAGIC, 4)
+#define GENLOCK_IOC_WAIT _IOW(GENLOCK_IOC_MAGIC, 5,   struct genlock_lock)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define GENLOCK_IOC_DREADLOCK _IOW(GENLOCK_IOC_MAGIC, 6,   struct genlock_lock)
+#endif
+