1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _ASM_SHMBUF_H 3 #define _ASM_SHMBUF_H 4 5 /* 6 * The shmid64_ds structure for the MIPS architecture. 7 * Note extra padding because this structure is passed back and forth 8 * between kernel and user space. 9 * 10 * As MIPS was lacking proper padding after shm_?time, we use 48 bits 11 * of the padding at the end to store a few additional bits of the time. 12 * libc implementations need to take care to convert this into a proper 13 * data structure when moving to 64-bit time_t. 14 */ 15 16 #ifdef __mips64 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 __kernel_time_t shm_dtime; /* last detach time */ 22 __kernel_time_t shm_ctime; /* last change time */ 23 __kernel_pid_t shm_cpid; /* pid of creator */ 24 __kernel_pid_t shm_lpid; /* pid of last operator */ 25 unsigned long shm_nattch; /* no. of current attaches */ 26 unsigned long __unused1; 27 unsigned long __unused2; 28 }; 29 #else 30 struct shmid64_ds { 31 struct ipc64_perm shm_perm; /* operation perms */ 32 size_t shm_segsz; /* size of segment (bytes) */ 33 unsigned long shm_atime; /* last attach time */ 34 unsigned long shm_dtime; /* last detach time */ 35 unsigned long shm_ctime; /* last change time */ 36 __kernel_pid_t shm_cpid; /* pid of creator */ 37 __kernel_pid_t shm_lpid; /* pid of last operator */ 38 unsigned long shm_nattch; /* no. of current attaches */ 39 unsigned short shm_atime_high; 40 unsigned short shm_dtime_high; 41 unsigned short shm_ctime_high; 42 unsigned short __unused1; 43 }; 44 #endif 45 46 struct shminfo64 { 47 unsigned long shmmax; 48 unsigned long shmmin; 49 unsigned long shmmni; 50 unsigned long shmseg; 51 unsigned long shmall; 52 unsigned long __unused1; 53 unsigned long __unused2; 54 unsigned long __unused3; 55 unsigned long __unused4; 56 }; 57 58 #endif /* _ASM_SHMBUF_H */ 59
