IPC之util.c源码解读

// SPDX-License-Identifier: GPL-2.0
/*
 * linux/ipc/util.c
 * Copyright (C) 1992 Krishna Balasubramanian
 *
 * Sep 1997 - Call suser() last after "normal" permission checks so we
 *            get BSD style process accounting right.
 *            Occurs in several places in the IPC code.
 *            Chris Evans, <// SPDX-License-Identifier: GPL-2.0
/*
 * li