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2864d32b AB |
1 | #ifndef __ASM_GENERIC_SHMBUF_H |
2 | #define __ASM_GENERIC_SHMBUF_H | |
3 | ||
4 | #include <asm/bitsperlong.h> | |
5 | ||
6 | /* | |
7 | * The shmid64_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 | * shmid64_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 | * | |
20 | * Pad space is left for: | |
21 | * - 64-bit time_t to solve y2038 problem | |
22 | * - 2 miscellaneous 32-bit values | |
23 | */ | |
24 | ||
25 | struct shmid64_ds { | |
26 | struct ipc64_perm shm_perm; /* operation perms */ | |
27 | size_t shm_segsz; /* size of segment (bytes) */ | |
28 | __kernel_time_t shm_atime; /* last attach time */ | |
29 | #if __BITS_PER_LONG != 64 | |
30 | unsigned long __unused1; | |
31 | #endif | |
32 | __kernel_time_t shm_dtime; /* last detach time */ | |
33 | #if __BITS_PER_LONG != 64 | |
34 | unsigned long __unused2; | |
35 | #endif | |
36 | __kernel_time_t shm_ctime; /* last change time */ | |
37 | #if __BITS_PER_LONG != 64 | |
38 | unsigned long __unused3; | |
39 | #endif | |
40 | __kernel_pid_t shm_cpid; /* pid of creator */ | |
41 | __kernel_pid_t shm_lpid; /* pid of last operator */ | |
f8dcdf01 L |
42 | __kernel_ulong_t shm_nattch; /* no. of current attaches */ |
43 | __kernel_ulong_t __unused4; | |
44 | __kernel_ulong_t __unused5; | |
2864d32b AB |
45 | }; |
46 | ||
47 | struct shminfo64 { | |
f8dcdf01 L |
48 | __kernel_ulong_t shmmax; |
49 | __kernel_ulong_t shmmin; | |
50 | __kernel_ulong_t shmmni; | |
51 | __kernel_ulong_t shmseg; | |
52 | __kernel_ulong_t shmall; | |
53 | __kernel_ulong_t __unused1; | |
54 | __kernel_ulong_t __unused2; | |
55 | __kernel_ulong_t __unused3; | |
56 | __kernel_ulong_t __unused4; | |
2864d32b AB |
57 | }; |
58 | ||
59 | #endif /* __ASM_GENERIC_SHMBUF_H */ |