sembuf.h

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#ifndef _S390_SEMBUF_H
#define _S390_SEMBUF_H

/* 
 * The semid64_ds structure for S/390 architecture.
 * Note extra padding because this structure is passed back and forth
 * between kernel and user space.
 *
 * Pad space is left for:
 * - 64-bit time_t to solve y2038 problem (for !__s390x__)
 * - 2 miscellaneous 32-bit values
 */

struct semid64_ds {
    struct ipc64_perm sem_perm;     /* permissions .. see ipc.h */
    __kernel_time_t sem_otime;      /* last semop time */
#ifndef __s390x__
    unsigned long   __unused1;
#endif /* ! __s390x__ */
    __kernel_time_t sem_ctime;      /* last change time */
#ifndef __s390x__
    unsigned long   __unused2;
#endif /* ! __s390x__ */
    unsigned long   sem_nsems;      /* no. of semaphores in array */
    unsigned long   __unused3;
    unsigned long   __unused4;
};

#endif /* _S390_SEMBUF_H */