2 * Copyright (C) 2013 IBM Corporation
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #define container_of(_ptr, _type, _member) ({ \
23 const typeof( ((_type *)0)->_member ) *__mptr = (_ptr); \
24 (_type *)( (char *)__mptr - offsetof(_type,_member) );})
28 #define offsetof(_type, _member) ((size_t) &((_type *)0)->_member)
31 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))