v4.19.13 snapshot.
diff --git a/include/uapi/linux/adfs_fs.h b/include/uapi/linux/adfs_fs.h
new file mode 100644
index 0000000..151d93e
--- /dev/null
+++ b/include/uapi/linux/adfs_fs.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_ADFS_FS_H
+#define _UAPI_ADFS_FS_H
+
+#include <linux/types.h>
+#include <linux/magic.h>
+
+/*
+ * Disc Record at disc address 0xc00
+ */
+struct adfs_discrecord {
+ __u8 log2secsize;
+ __u8 secspertrack;
+ __u8 heads;
+ __u8 density;
+ __u8 idlen;
+ __u8 log2bpmb;
+ __u8 skew;
+ __u8 bootoption;
+ __u8 lowsector;
+ __u8 nzones;
+ __le16 zone_spare;
+ __le32 root;
+ __le32 disc_size;
+ __le16 disc_id;
+ __u8 disc_name[10];
+ __le32 disc_type;
+ __le32 disc_size_high;
+ __u8 log2sharesize:4;
+ __u8 unused40:4;
+ __u8 big_flag:1;
+ __u8 unused41:1;
+ __u8 nzones_high;
+ __le32 format_version;
+ __le32 root_size;
+ __u8 unused52[60 - 52];
+};
+
+#define ADFS_DISCRECORD (0xc00)
+#define ADFS_DR_OFFSET (0x1c0)
+#define ADFS_DR_SIZE 60
+#define ADFS_DR_SIZE_BITS (ADFS_DR_SIZE << 3)
+
+
+#endif /* _UAPI_ADFS_FS_H */