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01: #ifndef __ASM_GENERIC_SEMBUF_H
02: #define __ASM_GENERIC_SEMBUF_H
03: 
04: #include <asm/bitsperlong.h>
05: 
06: /*
07:  * The semid64_ds structure for x86 architecture.
08:  * Note extra padding because this structure is passed back and forth
09:  * 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: 

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