Use __glibc_reserved instead __unused.

sysdeps/unix/sysv/linux/bits/ipc.h

@@ -50,6 +50,6 @@ struct ipc_perm
     unsigned short int __pad1;
     unsigned short int __seq;		/* Sequence number.  */
     unsigned short int __pad2;
-    __syscall_ulong_t __unused1;
-    __syscall_ulong_t __unused2;
+    __syscall_ulong_t __glibc_reserved1;
+    __syscall_ulong_t __glibc_reserved2;
   };

sysdeps/unix/sysv/linux/bits/msq.h

@@ -39,18 +39,18 @@ struct msqid_ds
 {
   struct ipc_perm msg_perm;	/* structure describing operation permission */
   __time_t msg_stime;		/* time of last msgsnd command */
-  unsigned long int __unused1;
+  unsigned long int __glibc_reserved1;
   __time_t msg_rtime;		/* time of last msgrcv command */
-  unsigned long int __unused2;
+  unsigned long int __glibc_reserved2;
   __time_t msg_ctime;		/* time of last change */
-  unsigned long int __unused3;
+  unsigned long int __glibc_reserved3;
   unsigned long int __msg_cbytes; /* current number of bytes on queue */
   msgqnum_t msg_qnum;		/* number of messages currently on queue */
   msglen_t msg_qbytes;		/* max number of bytes allowed on queue */
   __pid_t msg_lspid;		/* pid of last msgsnd() */
   __pid_t msg_lrpid;		/* pid of last msgrcv() */
-  unsigned long int __unused4;
-  unsigned long int __unused5;
+  unsigned long int __glibc_reserved4;
+  unsigned long int __glibc_reserved5;
 };
 
 #ifdef __USE_MISC

sysdeps/unix/sysv/linux/bits/sem.h

@@ -39,12 +39,12 @@ struct semid_ds
 {
   struct ipc_perm sem_perm;		/* operation permission struct */
   __time_t sem_otime;			/* last semop() time */
-  unsigned long int __unused1;
+  unsigned long int __glibc_reserved1;
   __time_t sem_ctime;			/* last time changed by semctl() */
-  unsigned long int __unused2;
+  unsigned long int __glibc_reserved2;
   unsigned long int sem_nsems;		/* number of semaphores in set */
-  unsigned long int __unused3;
-  unsigned long int __unused4;
+  unsigned long int __glibc_reserved3;
+  unsigned long int __glibc_reserved4;
 };
 
 /* The user should define a union like the following to use it for arguments

sysdeps/unix/sysv/linux/bits/shm.h

@@ -51,16 +51,16 @@ struct shmid_ds
     struct ipc_perm shm_perm;		/* operation permission struct */
     size_t shm_segsz;			/* size of segment in bytes */
     __time_t shm_atime;			/* time of last shmat() */
-    unsigned long int __unused1;
+    unsigned long int __glibc_reserved1;
     __time_t shm_dtime;			/* time of last shmdt() */
-    unsigned long int __unused2;
+    unsigned long int __glibc_reserved2;
     __time_t shm_ctime;			/* time of last change by shmctl() */
-    unsigned long int __unused3;
+    unsigned long int __glibc_reserved3;
     __pid_t shm_cpid;			/* pid of creator */
     __pid_t shm_lpid;			/* pid of last shmop */
     shmatt_t shm_nattch;		/* number of current attaches */
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __glibc_reserved4;
+    unsigned long int __glibc_reserved5;
   };
 
 #ifdef __USE_MISC
@@ -82,10 +82,10 @@ struct	shminfo
     unsigned long int shmmni;
     unsigned long int shmseg;
     unsigned long int shmall;
-    unsigned long int __unused1;
-    unsigned long int __unused2;
-    unsigned long int __unused3;
-    unsigned long int __unused4;
+    unsigned long int __glibc_reserved1;
+    unsigned long int __glibc_reserved2;
+    unsigned long int __glibc_reserved3;
+    unsigned long int __glibc_reserved4;
   };
 
 struct shm_info

sysdeps/unix/sysv/linux/bits/stat.h

@@ -84,8 +84,8 @@ struct stat
     unsigned long int st_ctimensec;	/* Nsecs of last status change.  */
 #endif
 #ifndef __USE_FILE_OFFSET64
-    unsigned long int __unused4;
-    unsigned long int __unused5;
+    unsigned long int __glibc_reserved4;
+    unsigned long int __glibc_reserved5;
 #else
     __ino64_t st_ino;			/* File serial number.	*/
 #endif