diff --git a/libc/kernel/uapi/linux/loop.h b/libc/kernel/uapi/linux/loop.h
new file mode 100644
index 0000000..14a4602
--- /dev/null
+++ b/libc/kernel/uapi/linux/loop.h
@@ -0,0 +1,96 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_LOOP_H
+#define _UAPI_LINUX_LOOP_H
+#define LO_NAME_SIZE 64
+#define LO_KEY_SIZE 32
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+enum {
+ LO_FLAGS_READ_ONLY = 1,
+ LO_FLAGS_AUTOCLEAR = 4,
+ LO_FLAGS_PARTSCAN = 8,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+#include <asm/posix_types.h>
+#include <linux/types.h>
+struct loop_info {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int lo_number;
+ __kernel_old_dev_t lo_device;
+ unsigned long lo_inode;
+ __kernel_old_dev_t lo_rdevice;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int lo_offset;
+ int lo_encrypt_type;
+ int lo_encrypt_key_size;
+ int lo_flags;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ char lo_name[LO_NAME_SIZE];
+ unsigned char lo_encrypt_key[LO_KEY_SIZE];
+ unsigned long lo_init[2];
+ char reserved[4];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+struct loop_info64 {
+ __u64 lo_device;
+ __u64 lo_inode;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u64 lo_rdevice;
+ __u64 lo_offset;
+ __u64 lo_sizelimit;
+ __u32 lo_number;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u32 lo_encrypt_type;
+ __u32 lo_encrypt_key_size;
+ __u32 lo_flags;
+ __u8 lo_file_name[LO_NAME_SIZE];
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ __u8 lo_crypt_name[LO_NAME_SIZE];
+ __u8 lo_encrypt_key[LO_KEY_SIZE];
+ __u64 lo_init[2];
+};
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LO_CRYPT_NONE 0
+#define LO_CRYPT_XOR 1
+#define LO_CRYPT_DES 2
+#define LO_CRYPT_FISH2 3
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LO_CRYPT_BLOW 4
+#define LO_CRYPT_CAST128 5
+#define LO_CRYPT_IDEA 6
+#define LO_CRYPT_DUMMY 9
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LO_CRYPT_SKIPJACK 10
+#define LO_CRYPT_CRYPTOAPI 18
+#define MAX_LO_CRYPT 20
+#define LOOP_SET_FD 0x4C00
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LOOP_CLR_FD 0x4C01
+#define LOOP_SET_STATUS 0x4C02
+#define LOOP_GET_STATUS 0x4C03
+#define LOOP_SET_STATUS64 0x4C04
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LOOP_GET_STATUS64 0x4C05
+#define LOOP_CHANGE_FD 0x4C06
+#define LOOP_SET_CAPACITY 0x4C07
+#define LOOP_CTL_ADD 0x4C80
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define LOOP_CTL_REMOVE 0x4C81
+#define LOOP_CTL_GET_FREE 0x4C82
+#endif