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