kdev_t.h

来自「Linux Device Mapper Source Code」· C头文件 代码 · 共 23 行

/*
 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
 *
 * This file is part of the device-mapper userspace tools.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU Lesser General Public License v.2.1.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _DM_KDEV_H
#define _DM_KDEV_H

#define MAJOR(dev)      ((dev & 0xfff00) >> 8)
#define MINOR(dev)      ((dev & 0xff) | ((dev >> 12) & 0xfff00))
#define MKDEV(ma,mi)    ((mi & 0xff) | (ma << 8) | ((mi & ~0xff) << 12))

#endif