linux/include/uapi/asm-generic/ipcbuf.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef __ASM_GENERIC_IPCBUF_H
#define __ASM_GENERIC_IPCBUF_H

#include <linux/posix_types.h>

/*
 * The generic ipc64_perm structure:
 * Note extra padding because this structure is passed back and forth
 * between kernel and user space.
 *
 * ipc64_perm was originally meant to be architecture specific, but
 * everyone just ended up making identical copies without specific
 * optimizations, so we may just as well all use the same one.
 *
 * Pad space is left for:
 * - 32-bit mode_t on architectures that only had 16 bit
 * - 32-bit seq
 * - 2 miscellaneous 32-bit values
 */

struct ipc64_perm { … };

#endif /* __ASM_GENERIC_IPCBUF_H */