arch/x86/include/asm/shmbuf.h

   1 #ifndef _ASM_X86_SHMBUF_H
   2 #define _ASM_X86_SHMBUF_H
   3
   4 /*
   5  * The shmid64_ds structure for x86 architecture.
   6  * Note extra padding because this structure is passed back and forth
   7  * between kernel and user space.
   8  *
   9  * Pad space on 32 bit is left for:
  10  * - 64-bit time_t to solve y2038 problem
  11  * - 2 miscellaneous 32-bit values
  12  *
  13  * Pad space on 64 bit is left for:
  14  * - 2 miscellaneous 64-bit values
  15  */
  16
  17 struct shmid64_ds {
  18         struct ipc64_perm       shm_perm;       /* operation perms */
  19         size_t                  shm_segsz;      /* size of segment (bytes) */
  20         __kernel_time_t         shm_atime;      /* last attach time */
  21 #ifdef __i386__
  22         unsigned long           __unused1;
  23 #endif
  24         __kernel_time_t         shm_dtime;      /* last detach time */
  25 #ifdef __i386__
  26         unsigned long           __unused2;
  27 #endif
  28         __kernel_time_t         shm_ctime;      /* last change time */
  29 #ifdef __i386__
  30         unsigned long           __unused3;
  31 #endif
  32         __kernel_pid_t          shm_cpid;       /* pid of creator */
  33         __kernel_pid_t          shm_lpid;       /* pid of last operator */
  34         unsigned long           shm_nattch;     /* no. of current attaches */
  35         unsigned long           __unused4;
  36         unsigned long           __unused5;
  37 };
  38
  39 struct shminfo64 {
  40         unsigned long   shmmax;
  41         unsigned long   shmmin;
  42         unsigned long   shmmni;
  43         unsigned long   shmseg;
  44         unsigned long   shmall;
  45         unsigned long   __unused1;
  46         unsigned long   __unused2;
  47         unsigned long   __unused3;
  48         unsigned long   __unused4;
  49 };
  50
  51 #endif /* _ASM_X86_SHMBUF_H */