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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/xtensa/include/uapi/asm/shmbuf.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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/*

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 * include/asm-xtensa/shmbuf.h

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 *

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 * The shmid64_ds structure for Xtensa architecture.

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 * Note extra padding because this structure is passed back and forth

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 * between kernel and user space, but the padding is on the wrong

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 * side for big-endian xtensa, for historic reasons.

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 *

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 * Pad space is left for:

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 * - 2 miscellaneous 32-bit values

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 *

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 * This file is subject to the terms and conditions of the GNU General Public

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 * License.  See the file "COPYING" in the main directory of this archive

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 * for more details.

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 *

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 * Copyright (C) 2001 - 2005 Tensilica Inc.

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 */

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#ifndef _XTENSA_SHMBUF_H

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#define _XTENSA_SHMBUF_H

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#include <asm/ipcbuf.h>

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#include <asm/posix_types.h>

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struct shmid64_ds {

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	struct ipc64_perm	shm_perm;	/* operation perms */

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	__kernel_size_t		shm_segsz;	/* size of segment (bytes) */

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	unsigned long		shm_atime;	/* last attach time */

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	unsigned long		shm_atime_high;

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	unsigned long		shm_dtime;	/* last detach time */

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	unsigned long		shm_dtime_high;

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	unsigned long		shm_ctime;	/* last change time */

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	unsigned long		shm_ctime_high;

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	__kernel_pid_t		shm_cpid;	/* pid of creator */

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	__kernel_pid_t		shm_lpid;	/* pid of last operator */

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	unsigned long		shm_nattch;	/* no. of current attaches */

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	unsigned long		__unused4;

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	unsigned long		__unused5;

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};

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struct shminfo64 {

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	unsigned long	shmmax;

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	unsigned long	shmmin;

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	unsigned long	shmmni;

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	unsigned long	shmseg;

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	unsigned long	shmall;

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	unsigned long	__unused1;

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	unsigned long	__unused2;

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	unsigned long	__unused3;

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	unsigned long	__unused4;

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};

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#endif	/* _XTENSA_SHMBUF_H */

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