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sysdev: use mutex instead of semaphore 

The sysdev code use a semaphore as mutex.  Use the mutex API instead of the
(binary) semaphore.

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Matthias Kaehlcke 2007-05-23 14:19:42 -07:00 committed by Greg Kroah-Hartman
parent 80f03e349f
commit 9f3f776bd9
1 changed files with 12 additions and 12 deletions
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24
drivers/base/sys.c
View File

@ -21,7 +21,7 @@
#include <linux/string.h>
#include <linux/pm.h>
#include <linux/device.h>
#include <asm/semaphore.h>
#include <linux/mutex.h>
#include "base.h"
@ -155,7 +155,7 @@ EXPORT_SYMBOL_GPL(sysdev_class_unregister);
static LIST_HEAD(sysdev_drivers);
static DECLARE_MUTEX(sysdev_drivers_lock);
static DEFINE_MUTEX(sysdev_drivers_lock);
/**
* sysdev_driver_register - Register auxillary driver
@ -172,7 +172,7 @@ static DECLARE_MUTEX(sysdev_drivers_lock);
int sysdev_driver_register(struct sysdev_class * cls,
struct sysdev_driver * drv)
{
down(&sysdev_drivers_lock);
mutex_lock(&sysdev_drivers_lock);
if (cls && kset_get(&cls->kset)) {
list_add_tail(&drv->entry, &cls->drivers);
@ -184,7 +184,7 @@ int sysdev_driver_register(struct sysdev_class * cls,
}
} else
list_add_tail(&drv->entry, &sysdev_drivers);
up(&sysdev_drivers_lock);
mutex_unlock(&sysdev_drivers_lock);
return 0;
}
@ -197,7 +197,7 @@ int sysdev_driver_register(struct sysdev_class * cls,
void sysdev_driver_unregister(struct sysdev_class * cls,
struct sysdev_driver * drv)
{
down(&sysdev_drivers_lock);
mutex_lock(&sysdev_drivers_lock);
list_del_init(&drv->entry);
if (cls) {
if (drv->remove) {
@ -207,7 +207,7 @@ void sysdev_driver_unregister(struct sysdev_class * cls,
}
kset_put(&cls->kset);
}
up(&sysdev_drivers_lock);
mutex_unlock(&sysdev_drivers_lock);
}
EXPORT_SYMBOL_GPL(sysdev_driver_register);
@ -246,7 +246,7 @@ int sysdev_register(struct sys_device * sysdev)
if (!error) {
struct sysdev_driver * drv;
down(&sysdev_drivers_lock);
mutex_lock(&sysdev_drivers_lock);
/* Generic notification is implicit, because it's that
* code that should have called us.
*/
@ -262,7 +262,7 @@ int sysdev_register(struct sys_device * sysdev)
if (drv->add)
drv->add(sysdev);
}
up(&sysdev_drivers_lock);
mutex_unlock(&sysdev_drivers_lock);
}
return error;
}
@ -271,7 +271,7 @@ void sysdev_unregister(struct sys_device * sysdev)
{
struct sysdev_driver * drv;
down(&sysdev_drivers_lock);
mutex_lock(&sysdev_drivers_lock);
list_for_each_entry(drv, &sysdev_drivers, entry) {
if (drv->remove)
drv->remove(sysdev);
@ -281,7 +281,7 @@ void sysdev_unregister(struct sys_device * sysdev)
if (drv->remove)
drv->remove(sysdev);
}
up(&sysdev_drivers_lock);
mutex_unlock(&sysdev_drivers_lock);
kobject_unregister(&sysdev->kobj);
}
@ -308,7 +308,7 @@ void sysdev_shutdown(void)
pr_debug("Shutting Down System Devices\n");
down(&sysdev_drivers_lock);
mutex_lock(&sysdev_drivers_lock);
list_for_each_entry_reverse(cls, &system_subsys.list,
kset.kobj.entry) {
struct sys_device * sysdev;
@ -337,7 +337,7 @@ void sysdev_shutdown(void)
cls->shutdown(sysdev);
}
}
up(&sysdev_drivers_lock);
mutex_unlock(&sysdev_drivers_lock);
}
static void __sysdev_resume(struct sys_device *dev)