OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / include / linux / mtd / blktrans.h
blob1bbd9f28924564d188f2a01bc2c14a3ee49f691b
1 /*
2 * Copyright © 2003-2010 David Woodhouse <dwmw2@infradead.org>
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; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #ifndef __MTD_TRANS_H__
21 #define __MTD_TRANS_H__
23 #include <linux/mutex.h>
24 #include <linux/kref.h>
25 #include <linux/sysfs.h>
27 struct hd_geometry;
28 struct mtd_info;
29 struct mtd_blktrans_ops;
30 struct file;
31 struct inode;
33 struct mtd_blktrans_dev {
34 struct mtd_blktrans_ops *tr;
35 struct list_head list;
36 struct mtd_info *mtd;
37 struct mutex lock;
38 int devnum;
39 bool bg_stop;
40 unsigned long size;
41 int readonly;
42 int open;
43 struct kref ref;
44 struct gendisk *disk;
45 struct attribute_group *disk_attributes;
46 struct task_struct *thread;
47 struct request_queue *rq;
48 spinlock_t queue_lock;
49 void *priv;
52 struct mtd_blktrans_ops {
53 char *name;
54 int major;
55 int part_bits;
56 int blksize;
57 int blkshift;
59 /* Access functions */
60 int (*readsect)(struct mtd_blktrans_dev *dev,
61 unsigned long block, char *buffer);
62 int (*writesect)(struct mtd_blktrans_dev *dev,
63 unsigned long block, char *buffer);
64 int (*discard)(struct mtd_blktrans_dev *dev,
65 unsigned long block, unsigned nr_blocks);
66 void (*background)(struct mtd_blktrans_dev *dev);
68 /* Block layer ioctls */
69 int (*getgeo)(struct mtd_blktrans_dev *dev, struct hd_geometry *geo);
70 int (*flush)(struct mtd_blktrans_dev *dev);
72 /* Called with mtd_table_mutex held; no race with add/remove */
73 int (*open)(struct mtd_blktrans_dev *dev);
74 int (*release)(struct mtd_blktrans_dev *dev);
76 /* Called on {de,}registration and on subsequent addition/removal
77 of devices, with mtd_table_mutex held. */
78 void (*add_mtd)(struct mtd_blktrans_ops *tr, struct mtd_info *mtd);
79 void (*remove_dev)(struct mtd_blktrans_dev *dev);
81 struct list_head devs;
82 struct list_head list;
83 struct module *owner;
86 extern int register_mtd_blktrans(struct mtd_blktrans_ops *tr);
87 extern int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr);
88 extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
89 extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
90 extern int mtd_blktrans_cease_background(struct mtd_blktrans_dev *dev);
93 #endif /* __MTD_TRANS_H__ */