#ifndef __ASM_GENERIC_MSGBUF_H
  #define __ASM_GENERIC_MSGBUF_H
  
  #include <asm/bitsperlong.h>
  /*
   * generic msqid64_ds structure.
   *
   * Note extra padding because this structure is passed back and forth
   * between kernel and user space.
   *
   * msqid64_ds was originally meant to be architecture specific, but
   * everyone just ended up making identical copies without specific
   * optimizations, so we may just as well all use the same one.
   *
   * 64 bit architectures typically define a 64 bit __kernel_time_t,
   * so they do not need the first three padding words.
   * On big-endian systems, the padding is in the wrong place.
   *
   * Pad space is left for:
   * - 64-bit time_t to solve y2038 problem
   * - 2 miscellaneous 32-bit values
   */
  
  struct msqid64_ds {
  	struct ipc64_perm msg_perm;
  	__kernel_time_t msg_stime;	/* last msgsnd time */
  #if __BITS_PER_LONG != 64
  	unsigned long	__unused1;
  #endif
  	__kernel_time_t msg_rtime;	/* last msgrcv time */
  #if __BITS_PER_LONG != 64
  	unsigned long	__unused2;
  #endif
  	__kernel_time_t msg_ctime;	/* last change time */
  #if __BITS_PER_LONG != 64
  	unsigned long	__unused3;
  #endif
  	unsigned long  msg_cbytes;	/* current number of bytes on queue */
  	unsigned long  msg_qnum;	/* number of messages in queue */
  	unsigned long  msg_qbytes;	/* max number of bytes on queue */
  	__kernel_pid_t msg_lspid;	/* pid of last msgsnd */
  	__kernel_pid_t msg_lrpid;	/* last receive pid */
  	unsigned long  __unused4;
  	unsigned long  __unused5;
  };
  
  #endif /* __ASM_GENERIC_MSGBUF_H */