drivers/base/attribute_container.c: use mutex instead of binary semaphore

use mutex instead of binary semaphore in
drivers/base/attribute_container.c

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>

diff --git a/drivers/base/attribute_container.c b/drivers/base/attribute_container.c
index 2222073..1ec0654 100644 (file)
--- a/drivers/base/attribute_container.c
+++ b/drivers/base/attribute_container.c
@@ -62,7 +62,7 @@ EXPORT_SYMBOL_GPL(attribute_container_classdev_to_container);
 
 static struct list_head attribute_container_list;
 
-static DECLARE_MUTEX(attribute_container_mutex);
+static DEFINE_MUTEX(attribute_container_mutex);
 
 /**
  * attribute_container_register - register an attribute container
@@ -77,9 +77,9 @@ attribute_container_register(struct attribute_container *cont)
        klist_init(&cont->containers,internal_container_klist_get,
                   internal_container_klist_put);
                
-       down(&attribute_container_mutex);
+       mutex_lock(&attribute_container_mutex);
        list_add_tail(&cont->node, &attribute_container_list);
-       up(&attribute_container_mutex);
+       mutex_unlock(&attribute_container_mutex);
 
        return 0;
 }
@@ -94,7 +94,7 @@ int
 attribute_container_unregister(struct attribute_container *cont)
 {
        int retval = -EBUSY;
-       down(&attribute_container_mutex);
+       mutex_lock(&attribute_container_mutex);
        spin_lock(&cont->containers.k_lock);
        if (!list_empty(&cont->containers.k_list))
                goto out;
@@ -102,7 +102,7 @@ attribute_container_unregister(struct attribute_container *cont)
        list_del(&cont->node);
  out:
        spin_unlock(&cont->containers.k_lock);
-       up(&attribute_container_mutex);
+       mutex_unlock(&attribute_container_mutex);
        return retval;
                
 }
@@ -145,7 +145,7 @@ attribute_container_add_device(struct device *dev,
 {
        struct attribute_container *cont;
 
-       down(&attribute_container_mutex);
+       mutex_lock(&attribute_container_mutex);
        list_for_each_entry(cont, &attribute_container_list, node) {
                struct internal_container *ic;
 
@@ -173,7 +173,7 @@ attribute_container_add_device(struct device *dev,
                        attribute_container_add_class_device(&ic->classdev);
                klist_add_tail(&ic->node, &cont->containers);
        }
-       up(&attribute_container_mutex);
+       mutex_unlock(&attribute_container_mutex);
 }
 
 /* FIXME: can't break out of this unless klist_iter_exit is also
@@ -211,7 +211,7 @@ attribute_container_remove_device(struct device *dev,
 {
        struct attribute_container *cont;
 
-       down(&attribute_container_mutex);
+       mutex_lock(&attribute_container_mutex);
        list_for_each_entry(cont, &attribute_container_list, node) {
                struct internal_container *ic;
                struct klist_iter iter;
@@ -234,7 +234,7 @@ attribute_container_remove_device(struct device *dev,
                        }
                }
        }
-       up(&attribute_container_mutex);
+       mutex_unlock(&attribute_container_mutex);
 }
 
 /**
@@ -255,7 +255,7 @@ attribute_container_device_trigger(struct device *dev,
 {
        struct attribute_container *cont;
 
-       down(&attribute_container_mutex);
+       mutex_lock(&attribute_container_mutex);
        list_for_each_entry(cont, &attribute_container_list, node) {
                struct internal_container *ic;
                struct klist_iter iter;
@@ -273,7 +273,7 @@ attribute_container_device_trigger(struct device *dev,
                                fn(cont, dev, &ic->classdev);
                }
        }
-       up(&attribute_container_mutex);
+       mutex_unlock(&attribute_container_mutex);
 }
 
 /**
@@ -295,12 +295,12 @@ attribute_container_trigger(struct device *dev,
 {
        struct attribute_container *cont;
 
-       down(&attribute_container_mutex);
+       mutex_lock(&attribute_container_mutex);
        list_for_each_entry(cont, &attribute_container_list, node) {
                if (cont->match(cont, dev))
                        fn(cont, dev);
        }
-       up(&attribute_container_mutex);
+       mutex_unlock(&attribute_container_mutex);
 }
 
 /**