remove "struct subsystem" as it is no longer needed

We need to work on cleaning up the relationship between kobjects, ksets and
ktypes.  The removal of 'struct subsystem' is the first step of this,
especially as it is not really needed at all.

Thanks to Kay for fixing the bugs in this patch.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 25 insertions, 33 deletions

diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index eb0e63ef297f..c288e41ba331 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -124,7 +124,6 @@ struct kset_uevent_ops {
 };
 
 struct kset {
-        struct subsystem        * subsys;
         struct kobj_type        * ktype;
         struct list_head        list;
         spinlock_t              list_lock;
@@ -171,32 +170,23 @@ extern struct kobject * kset_find_obj(struct kset *, const char *);
 #define set_kset_name(str)      .kset = { .kobj = { .name = str } }
 
 
-
-struct subsystem {
-        struct kset             kset;
-};
-
 #define decl_subsys(_name,_type,_uevent_ops) \
-struct subsystem _name##_subsys = { \
-        .kset = { \
-                .kobj = { .name = __stringify(_name) }, \
-                .ktype = _type, \
-                .uevent_ops =_uevent_ops, \
-        } \
+struct kset _name##_subsys = { \
+        .kobj = { .name = __stringify(_name) }, \
+        .ktype = _type, \
+        .uevent_ops =_uevent_ops, \
 }
 #define decl_subsys_name(_varname,_name,_type,_uevent_ops) \
-struct subsystem _varname##_subsys = { \
-        .kset = { \
-                .kobj = { .name = __stringify(_name) }, \
-                .ktype = _type, \
-                .uevent_ops =_uevent_ops, \
-        } \
+struct kset _varname##_subsys = { \
+        .kobj = { .name = __stringify(_name) }, \
+        .ktype = _type, \
+        .uevent_ops =_uevent_ops, \
 }
 
 /* The global /sys/kernel/ subsystem for people to chain off of */
-extern struct subsystem kernel_subsys;
+extern struct kset kernel_subsys;
 /* The global /sys/hypervisor/ subsystem  */
-extern struct subsystem hypervisor_subsys;
+extern struct kset hypervisor_subsys;
 
 /**
  * Helpers for setting the kset of registered objects.
@@ -214,7 +204,7 @@ extern struct subsystem hypervisor_subsys;
  */
 
 #define kobj_set_kset_s(obj,subsys) \
-        (obj)->kobj.kset = &(subsys).kset
+        (obj)->kobj.kset = &(subsys)
 
 /**
  *      kset_set_kset_s(obj,subsys) - set kset for embedded kset.
@@ -228,7 +218,7 @@ extern struct subsystem hypervisor_subsys;
  */
 
 #define kset_set_kset_s(obj,subsys) \
-        (obj)->kset.kobj.kset = &(subsys).kset
+        (obj)->kset.kobj.kset = &(subsys)
 
 /**
  *      subsys_set_kset(obj,subsys) - set kset for subsystem
@@ -241,29 +231,31 @@ extern struct subsystem hypervisor_subsys;
  */
 
 #define subsys_set_kset(obj,_subsys) \
-        (obj)->subsys.kset.kobj.kset = &(_subsys).kset
+        (obj)->subsys.kobj.kset = &(_subsys)
 
-extern void subsystem_init(struct subsystem *);
-extern int __must_check subsystem_register(struct subsystem *);
-extern void subsystem_unregister(struct subsystem *);
+extern void subsystem_init(struct kset *);
+extern int __must_check subsystem_register(struct kset *);
+extern void subsystem_unregister(struct kset *);
 
-static inline struct subsystem * subsys_get(struct subsystem * s)
+static inline struct kset *subsys_get(struct kset *s)
 {
-        return s ? container_of(kset_get(&s->kset),struct subsystem,kset) : NULL;
+        if (s)
+                return kset_get(s);
+        return NULL;
 }
 
-static inline void subsys_put(struct subsystem * s)
+static inline void subsys_put(struct kset *s)
 {
-        kset_put(&s->kset);
+        kset_put(s);
 }
 
 struct subsys_attribute {
         struct attribute attr;
-        ssize_t (*show)(struct subsystem *, char *);
-        ssize_t (*store)(struct subsystem *, const char *, size_t); 
+        ssize_t (*show)(struct kset *, char *);
+        ssize_t (*store)(struct kset *, const char *, size_t);
 };
 
-extern int __must_check subsys_create_file(struct subsystem * ,
+extern int __must_check subsys_create_file(struct kset *,
                                         struct subsys_attribute *);
 
 #if defined(CONFIG_HOTPLUG)