Replace the ioctl generation pipeline with bindgen clang_macro_fallback

gen/include/ioctl-addendum.h

@@ -8,3 +8,12 @@
 #define TCSETSF2 TCSETSF
 #define TCSETSW2 TCSETSW
 #endif
+
+// Ioctls from headers removed in recent kernels. Preserved for backward
+// compatibility.
+//
+// reiserfs_fs.h (removed), cm4000_cs.h (removed), meye.h (removed)
+#define REISERFS_IOC_UNPACK _IOW(0xCD, 1, long)
+#define CM_IOCGATR _IOWR('c', 1, unsigned long long)
+#define CM_IOSDBGLVL _IOW('c', 250, unsigned long long)
+#define MEYEIOC_SYNC _IOWR('v', 195, int)

gen/include/sys/socket.h

@@ -1,5 +1,10 @@
-// Define `sockaddr` ourselves because the uapi headers don't define it but
-// some use it.
+#ifndef _SYS_SOCKET_H
+#define _SYS_SOCKET_H
+
+#include <linux/socket.h>
+
 struct sockaddr {
     struct __kernel_sockaddr_storage __storage;
 };
+
+#endif

gen/include/sys/time.h

@@ -0,0 +1 @@
+#include <linux/time.h>

gen/include/sys/types.h

@@ -0,0 +1,14 @@
+#ifndef _SYS_TYPES_H
+#define _SYS_TYPES_H
+
+#include <linux/types.h>
+
+typedef unsigned short u_short;
+typedef unsigned long u_long;
+typedef unsigned long long u_quad_t;
+typedef unsigned long dev_t;
+typedef void *caddr_t;
+typedef unsigned short sa_family_t;
+typedef __kernel_loff_t loff_t;
+
+#endif