1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef __ASM_GENERIC_SEMBUF_H
3#define __ASM_GENERIC_SEMBUF_H
4
5#include <asm/bitsperlong.h>
6
7/*
8 * The semid64_ds structure for x86 architecture.
9 * Note extra padding because this structure is passed back and forth
10 * between kernel and user space.
11 *
12 * semid64_ds was originally meant to be architecture specific, but
13 * everyone just ended up making identical copies without specific
14 * optimizations, so we may just as well all use the same one.
15 *
16 * 64 bit architectures typically define a 64 bit __kernel_time_t,
17 * so they do not need the first two padding words.
18 * On big-endian systems, the padding is in the wrong place.
19 *
20 * Pad space is left for:
21 * - 64-bit time_t to solve y2038 problem
22 * - 2 miscellaneous 32-bit values
23 */
24struct semid64_ds {
25	struct ipc64_perm sem_perm;	/* permissions .. see ipc.h */
26	__kernel_time_t	sem_otime;	/* last semop time */
27#if __BITS_PER_LONG != 64
28	unsigned long	__unused1;
29#endif
30	__kernel_time_t	sem_ctime;	/* last change time */
31#if __BITS_PER_LONG != 64
32	unsigned long	__unused2;
33#endif
34	unsigned long	sem_nsems;	/* no. of semaphores in array */
35	unsigned long	__unused3;
36	unsigned long	__unused4;
37};
38
39#endif /* __ASM_GENERIC_SEMBUF_H */
40