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>

1 files changed, 12 insertions, 12 deletions

diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 29f1291966c1..18febe26caa1 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -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)