Merge branch 'task_killable' of git://git.kernel.org/pub/scm/linux/kernel/git/willy...

[pandora-kernel.git] / include / linux / configfs.h

diff --git a/include/linux/configfs.h b/include/linux/configfs.h
index def7c83..8c6967f 100644 (file)
--- a/include/linux/configfs.h
+++ b/include/linux/configfs.h
@@ -40,9 +40,9 @@
 #include <linux/types.h>
 #include <linux/list.h>
 #include <linux/kref.h>
+#include <linux/mutex.h>
 
 #include <asm/atomic.h>
-#include <asm/semaphore.h>
 
 #define CONFIGFS_ITEM_NAME_LEN 20
 
@@ -86,12 +86,10 @@ struct config_item_type {
        struct configfs_attribute               **ct_attrs;
 };
 
-
 /**
  *     group - a group of config_items of a specific type, belonging
  *     to a specific subsystem.
  */
-
 struct config_group {
        struct config_item              cg_item;
        struct list_head                cg_children;
@@ -99,13 +97,11 @@ struct config_group {
        struct config_group             **default_groups;
 };
 
-
 extern void config_group_init(struct config_group *group);
 extern void config_group_init_type_name(struct config_group *group,
                                        const char *name,
                                        struct config_item_type *type);
 
-
 static inline struct config_group *to_config_group(struct config_item *item)
 {
        return item ? container_of(item,struct config_group,cg_item) : NULL;
@@ -121,7 +117,8 @@ static inline void config_group_put(struct config_group *group)
        config_item_put(&group->cg_item);
 }
 
-extern struct config_item *config_group_find_obj(struct config_group *, const char *);
+extern struct config_item *config_group_find_item(struct config_group *,
+                                                 const char *);
 
 
 struct configfs_attribute {
@@ -172,12 +169,13 @@ struct configfs_group_operations {
        struct config_item *(*make_item)(struct config_group *group, const char *name);
        struct config_group *(*make_group)(struct config_group *group, const char *name);
        int (*commit_item)(struct config_item *item);
+       void (*disconnect_notify)(struct config_group *group, struct config_item *item);
        void (*drop_item)(struct config_group *group, struct config_item *item);
 };
 
 struct configfs_subsystem {
        struct config_group     su_group;
-       struct semaphore        su_sem;
+       struct mutex            su_mutex;
 };
 
 static inline struct configfs_subsystem *to_configfs_subsystem(struct config_group *group)
@@ -190,6 +188,11 @@ static inline struct configfs_subsystem *to_configfs_subsystem(struct config_gro
 int configfs_register_subsystem(struct configfs_subsystem *subsys);
 void configfs_unregister_subsystem(struct configfs_subsystem *subsys);
 
+/* These functions can sleep and can alloc with GFP_KERNEL */
+/* WARNING: These cannot be called underneath configfs callbacks!! */
+int configfs_depend_item(struct configfs_subsystem *subsys, struct config_item *target);
+void configfs_undepend_item(struct configfs_subsystem *subsys, struct config_item *target);
+
 #endif  /* __KERNEL__ */
 
 #endif /* _CONFIGFS_H_ */