/*
- * $Id: mtdcore.c,v 1.44 2004/11/16 18:28:59 dwmw2 Exp $
+ * $Id: mtdcore.c,v 1.47 2005/11/07 11:14:20 gleixner Exp $
*
* Core registration and callback routines for MTD
* drivers and users.
#include <linux/ioctl.h>
#include <linux/init.h>
#include <linux/mtd/compatmac.h>
-#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
-#endif
#include <linux/mtd/mtd.h>
-/* These are exported solely for the purpose of mtd_blkdevs.c. You
+/* These are exported solely for the purpose of mtd_blkdevs.c. You
should not use them for _anything_ else */
-DECLARE_MUTEX(mtd_table_mutex);
+DEFINE_MUTEX(mtd_table_mutex);
struct mtd_info *mtd_table[MAX_MTD_DEVICES];
EXPORT_SYMBOL_GPL(mtd_table_mutex);
{
int i;
- down(&mtd_table_mutex);
+ mutex_lock(&mtd_table_mutex);
for (i=0; i < MAX_MTD_DEVICES; i++)
if (!mtd_table[i]) {
struct mtd_notifier *not = list_entry(this, struct mtd_notifier, list);
not->add(mtd);
}
-
- up(&mtd_table_mutex);
+
+ mutex_unlock(&mtd_table_mutex);
/* We _know_ we aren't being removed, because
our caller is still holding us here. So none
of this try_ nonsense, and no bitching about it
__module_get(THIS_MODULE);
return 0;
}
-
- up(&mtd_table_mutex);
+
+ mutex_unlock(&mtd_table_mutex);
return 1;
}
int del_mtd_device (struct mtd_info *mtd)
{
int ret;
-
- down(&mtd_table_mutex);
+
+ mutex_lock(&mtd_table_mutex);
if (mtd_table[mtd->index] != mtd) {
ret = -ENODEV;
} else if (mtd->usecount) {
- printk(KERN_NOTICE "Removing MTD device #%d (%s) with use count %d\n",
+ printk(KERN_NOTICE "Removing MTD device #%d (%s) with use count %d\n",
mtd->index, mtd->name, mtd->usecount);
ret = -EBUSY;
} else {
ret = 0;
}
- up(&mtd_table_mutex);
+ mutex_unlock(&mtd_table_mutex);
return ret;
}
{
int i;
- down(&mtd_table_mutex);
+ mutex_lock(&mtd_table_mutex);
list_add(&new->list, &mtd_notifiers);
__module_get(THIS_MODULE);
-
+
for (i=0; i< MAX_MTD_DEVICES; i++)
if (mtd_table[i])
new->add(mtd_table[i]);
- up(&mtd_table_mutex);
+ mutex_unlock(&mtd_table_mutex);
}
/**
- * register_mtd_user - unregister a 'user' of MTD devices.
- * @new: pointer to notifier info structure
+ * unregister_mtd_user - unregister a 'user' of MTD devices.
+ * @old: pointer to notifier info structure
*
* Removes a callback function pair from the list of 'users' to be
* notified upon addition or removal of MTD devices. Causes the
{
int i;
- down(&mtd_table_mutex);
+ mutex_lock(&mtd_table_mutex);
module_put(THIS_MODULE);
for (i=0; i< MAX_MTD_DEVICES; i++)
if (mtd_table[i])
old->remove(mtd_table[i]);
-
+
list_del(&old->list);
- up(&mtd_table_mutex);
+ mutex_unlock(&mtd_table_mutex);
return 0;
}
* both, return the num'th driver only if its address matches. Return NULL
* if not.
*/
-
+
struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num)
{
struct mtd_info *ret = NULL;
int i;
- down(&mtd_table_mutex);
+ mutex_lock(&mtd_table_mutex);
if (num == -1) {
for (i=0; i< MAX_MTD_DEVICES; i++)
if (ret)
ret->usecount++;
- up(&mtd_table_mutex);
+ mutex_unlock(&mtd_table_mutex);
return ret;
}
{
int c;
- down(&mtd_table_mutex);
+ mutex_lock(&mtd_table_mutex);
c = --mtd->usecount;
- up(&mtd_table_mutex);
+ mutex_unlock(&mtd_table_mutex);
BUG_ON(c < 0);
module_put(mtd->owner);
EXPORT_SYMBOL(default_mtd_writev);
EXPORT_SYMBOL(default_mtd_readv);
-/*====================================================================*/
-/* Power management code */
-
-#ifdef CONFIG_PM
-
-#include <linux/pm.h>
-
-static struct pm_dev *mtd_pm_dev = NULL;
-
-static int mtd_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data)
-{
- int ret = 0, i;
-
- if (down_trylock(&mtd_table_mutex))
- return -EAGAIN;
- if (rqst == PM_SUSPEND) {
- for (i = 0; ret == 0 && i < MAX_MTD_DEVICES; i++) {
- if (mtd_table[i] && mtd_table[i]->suspend)
- ret = mtd_table[i]->suspend(mtd_table[i]);
- }
- } else i = MAX_MTD_DEVICES-1;
-
- if (rqst == PM_RESUME || ret) {
- for ( ; i >= 0; i--) {
- if (mtd_table[i] && mtd_table[i]->resume)
- mtd_table[i]->resume(mtd_table[i]);
- }
- }
- up(&mtd_table_mutex);
- return ret;
-}
-#endif
+#ifdef CONFIG_PROC_FS
/*====================================================================*/
/* Support for /proc/mtd */
-#ifdef CONFIG_PROC_FS
static struct proc_dir_entry *proc_mtd;
static inline int mtd_proc_info (char *buf, int i)
int len, l, i;
off_t begin = 0;
- down(&mtd_table_mutex);
+ mutex_lock(&mtd_table_mutex);
len = sprintf(page, "dev: size erasesize name\n");
for (i=0; i< MAX_MTD_DEVICES; i++) {
*eof = 1;
done:
- up(&mtd_table_mutex);
+ mutex_unlock(&mtd_table_mutex);
if (off >= len+begin)
return 0;
*start = page + (off-begin);
return ((count < begin+len-off) ? count : begin+len-off);
}
-#endif /* CONFIG_PROC_FS */
-
/*====================================================================*/
/* Init code */
static int __init init_mtd(void)
{
-#ifdef CONFIG_PROC_FS
if ((proc_mtd = create_proc_entry( "mtd", 0, NULL )))
proc_mtd->read_proc = mtd_read_proc;
-#endif
-
-#ifdef CONFIG_PM
- mtd_pm_dev = pm_register(PM_UNKNOWN_DEV, 0, mtd_pm_callback);
-#endif
return 0;
}
static void __exit cleanup_mtd(void)
{
-#ifdef CONFIG_PM
- if (mtd_pm_dev) {
- pm_unregister(mtd_pm_dev);
- mtd_pm_dev = NULL;
- }
-#endif
-
-#ifdef CONFIG_PROC_FS
if (proc_mtd)
remove_proc_entry( "mtd", NULL);
-#endif
}
module_init(init_mtd);
module_exit(cleanup_mtd);
+#endif /* CONFIG_PROC_FS */
+
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
git://git.onelab.eu / linux-2.6.git / blobdiff