+
+#ifndef PR_SET_CHILD_SUBREAPER
+#define PR_SET_CHILD_SUBREAPER 36
+#endif
+
+#ifndef MAX_HANDLE_SZ
+#define MAX_HANDLE_SZ 128
+#endif
+
+#ifndef __NR_name_to_handle_at
+# if defined(__x86_64__)
+# define __NR_name_to_handle_at 303
+# elif defined(__i386__)
+# define __NR_name_to_handle_at 341
+# elif defined(__arm__)
+# define __NR_name_to_handle_at 370
+# elif defined(__powerpc__)
+# define __NR_name_to_handle_at 345
+# else
+# error "__NR_name_to_handle_at is not defined"
+# endif
+#endif
+
+#if !HAVE_DECL_NAME_TO_HANDLE_AT
+struct file_handle {
+ unsigned int handle_bytes;
+ int handle_type;
+ unsigned char f_handle[0];
+};
+
+static inline int name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) {
+ return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags);
+}
+#endif
+
+#ifndef HAVE_SECURE_GETENV
+# ifdef HAVE___SECURE_GETENV
+# define secure_getenv __secure_getenv
+# else
+# error "neither secure_getenv nor __secure_getenv are available"
+# endif
+#endif
+
+#ifndef CIFS_MAGIC_NUMBER
+# define CIFS_MAGIC_NUMBER 0xFF534D42
+#endif
+
+#ifndef TFD_TIMER_CANCEL_ON_SET
+# define TFD_TIMER_CANCEL_ON_SET (1 << 1)
+#endif
+
+#ifndef SO_REUSEPORT
+# define SO_REUSEPORT 15
+#endif
+
+#ifndef EVIOCREVOKE
+# define EVIOCREVOKE _IOW('E', 0x91, int)
+#endif
+
+#ifndef DRM_IOCTL_SET_MASTER
+# define DRM_IOCTL_SET_MASTER _IO('d', 0x1e)
+#endif
+
+#ifndef DRM_IOCTL_DROP_MASTER
+# define DRM_IOCTL_DROP_MASTER _IO('d', 0x1f)
+#endif
+
+#if defined(__i386__) || defined(__x86_64__)
+
+/* The precise definition of __O_TMPFILE is arch specific, so let's
+ * just define this on x86 where we know the value. */
+
+#ifndef __O_TMPFILE
+#define __O_TMPFILE 020000000
+#endif
+
+/* a horrid kludge trying to make sure that this will fail on old kernels */
+#ifndef O_TMPFILE
+#define O_TMPFILE (__O_TMPFILE | O_DIRECTORY)
+#endif
+
+#endif
+
+#ifndef __NR_setns
+# if defined(__x86_64__)
+# define __NR_setns 308
+# elif defined(__i386__)
+# define __NR_setns 346
+# else
+# error "__NR_setns is not defined"
+# endif
+#endif
+
+#if !HAVE_DECL_SETNS
+static inline int setns(int fd, int nstype) {
+ return syscall(__NR_setns, fd, nstype);
+}
+#endif