sysfs: make kobj point to sysfs_dirent instead of dentry

As kobj sysfs dentries and inodes are gonna be made reclaimable,
dentry can't be used as naming token for sysfs file/directory, replace
kobj->dentry with kobj->sd.  The only external interface change is
shadow directory handling.  All other changes are contained in kobj
and sysfs.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 16 insertions, 12 deletions

diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index c288e41ba331..06cbf41d32d2 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -55,7 +55,7 @@ struct kobject {
         struct kobject          * parent;
         struct kset             * kset;
         struct kobj_type        * ktype;
-        struct dentry           * dentry;
+        struct sysfs_dirent     * sd;
         wait_queue_head_t       poll;
 };
 
@@ -71,13 +71,14 @@ extern void kobject_init(struct kobject *);
 extern void kobject_cleanup(struct kobject *);
 
 extern int __must_check kobject_add(struct kobject *);
-extern int __must_check kobject_shadow_add(struct kobject *, struct dentry *);
+extern int __must_check kobject_shadow_add(struct kobject *kobj,
+                                           struct sysfs_dirent *shadow_parent);
 extern void kobject_del(struct kobject *);
 
 extern int __must_check kobject_rename(struct kobject *, const char *new_name);
 extern int __must_check kobject_shadow_rename(struct kobject *kobj,
-                                                struct dentry *new_parent,
-                                                const char *new_name);
+                                              struct sysfs_dirent *new_parent,
+                                              const char *new_name);
 extern int __must_check kobject_move(struct kobject *, struct kobject *);
 
 extern int __must_check kobject_register(struct kobject *);
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 2a6df6444e69..4c43030fae5d 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -19,6 +19,7 @@ struct kobject;
 struct module;
 struct nameidata;
 struct dentry;
+struct sysfs_dirent;
 
 /* FIXME
  * The *owner field is no longer used, but leave around
@@ -92,13 +93,14 @@ extern int sysfs_schedule_callback(struct kobject *kobj,
                 void (*func)(void *), void *data, struct module *owner);
 
 extern int __must_check
-sysfs_create_dir(struct kobject *, struct dentry *);
+sysfs_create_dir(struct kobject *kobj, struct sysfs_dirent *shadow_parent_sd);
 
 extern void
 sysfs_remove_dir(struct kobject *);
 
 extern int __must_check
-sysfs_rename_dir(struct kobject *, struct dentry *, const char *new_name);
+sysfs_rename_dir(struct kobject *kobj, struct sysfs_dirent *new_parent_sd,
+                 const char *new_name);
 
 extern int __must_check
 sysfs_move_dir(struct kobject *, struct kobject *);
@@ -138,8 +140,8 @@ void sysfs_notify(struct kobject * k, char *dir, char *attr);
 
 extern int sysfs_make_shadowed_dir(struct kobject *kobj,
         void * (*follow_link)(struct dentry *, struct nameidata *));
-extern struct dentry *sysfs_create_shadow_dir(struct kobject *kobj);
-extern void sysfs_remove_shadow_dir(struct dentry *dir);
+extern struct sysfs_dirent *sysfs_create_shadow_dir(struct kobject *kobj);
+extern void sysfs_remove_shadow_dir(struct sysfs_dirent *shadow_sd);
 
 extern int __must_check sysfs_init(void);
 
@@ -151,7 +153,8 @@ static inline int sysfs_schedule_callback(struct kobject *kobj,
         return -ENOSYS;
 }
 
-static inline int sysfs_create_dir(struct kobject * k, struct dentry *shadow)
+static inline int sysfs_create_dir(struct kobject *kobj,
+                                   struct sysfs_dirent *shadow_parent_sd)
 {
         return 0;
 }
@@ -161,9 +164,9 @@ static inline void sysfs_remove_dir(struct kobject * k)
         ;
 }
 
-static inline int sysfs_rename_dir(struct kobject * k,
-                                        struct dentry *new_parent,
-                                        const char *new_name)
+static inline int sysfs_rename_dir(struct kobject *kobj,
+                                   struct sysfs_dirent *new_parent_sd,
+                                   const char *new_name)
 {
         return 0;
 }