kernel-ark/include/asm-x86/sembuf.h

#ifndef ASM_X86__SEMBUF_H
#define ASM_X86__SEMBUF_H

/*
 * The semid64_ds structure for x86 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
 * - 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 */
	unsigned long	__unused1;
	__kernel_time_t	sem_ctime;	/* last change time */
	unsigned long	__unused2;
	unsigned long	sem_nsems;	/* no. of semaphores in array */
	unsigned long	__unused3;
	unsigned long	__unused4;
};

#endif /* ASM_X86__SEMBUF_H */