1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 2#ifndef _ASM_SHMBUF_H
 3#define _ASM_SHMBUF_H
 4
 5#include <asm/ipcbuf.h>
 6#include <asm/posix_types.h>
 7
 8/*
 9 * The shmid64_ds structure for the MIPS architecture.
10 * Note extra padding because this structure is passed back and forth
11 * between kernel and user space.
12 *
13 * As MIPS was lacking proper padding after shm_?time, we use 48 bits
14 * of the padding at the end to store a few additional bits of the time.
15 * libc implementations need to take care to convert this into a proper
16 * data structure when moving to 64-bit time_t.
17 */
18
19#ifdef __mips64
20struct shmid64_ds {
21	struct ipc64_perm	shm_perm;	/* operation perms */
22	__kernel_size_t		shm_segsz;	/* size of segment (bytes) */
23	long			shm_atime;	/* last attach time */
24	long			shm_dtime;	/* last detach time */
25	long			shm_ctime;	/* last change time */
26	__kernel_pid_t		shm_cpid;	/* pid of creator */
27	__kernel_pid_t		shm_lpid;	/* pid of last operator */
28	unsigned long		shm_nattch;	/* no. of current attaches */
29	unsigned long		__unused1;
30	unsigned long		__unused2;
31};
32#else
33struct shmid64_ds {
34	struct ipc64_perm	shm_perm;	/* operation perms */
35	__kernel_size_t		shm_segsz;	/* size of segment (bytes) */
36	unsigned long		shm_atime;	/* last attach time */
37	unsigned long		shm_dtime;	/* last detach time */
38	unsigned long		shm_ctime;	/* last change time */
39	__kernel_pid_t		shm_cpid;	/* pid of creator */
40	__kernel_pid_t		shm_lpid;	/* pid of last operator */
41	unsigned long		shm_nattch;	/* no. of current attaches */
42	unsigned short		shm_atime_high;
43	unsigned short		shm_dtime_high;
44	unsigned short		shm_ctime_high;
45	unsigned short		__unused1;
46};
47#endif
48
49struct shminfo64 {
50	unsigned long	shmmax;
51	unsigned long	shmmin;
52	unsigned long	shmmni;
53	unsigned long	shmseg;
54	unsigned long	shmall;
55	unsigned long	__unused1;
56	unsigned long	__unused2;
57	unsigned long	__unused3;
58	unsigned long	__unused4;
59};
60
61#endif /* _ASM_SHMBUF_H */