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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 |
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