| 1 | /* |
| 2 | * simple.h |
| 3 | * |
| 4 | * Copyright (C) 2009 - Pierre-Marc Fournier (pierre-marc dot fournier at polymtl dot ca) |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #ifndef KCOMPAT_SIMPLE_H |
| 22 | #define KCOMPAT_SIMPLE_H |
| 23 | |
| 24 | /** |
| 25 | * container_of - cast a member of a structure out to the containing structure |
| 26 | * @ptr: the pointer to the member. |
| 27 | * @type: the type of the container struct this is embedded in. |
| 28 | * @member: the name of the member within the struct. |
| 29 | * |
| 30 | */ |
| 31 | #define container_of(ptr, type, member) ({ \ |
| 32 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
| 33 | (type *)( (char *)__mptr - offsetof(type,member) );}) |
| 34 | |
| 35 | |
| 36 | /* libkcompat: from rcupdate.h */ |
| 37 | |
| 38 | struct rcu_head { |
| 39 | struct rcu_head *next; |
| 40 | void (*func)(struct rcu_head *head); |
| 41 | }; |
| 42 | |
| 43 | #endif /* KCOMPAT_SIMPLE_H */ |