sysfs: kill struct sysfs_dir.

Previously, sysfs read() and write() calls looked for sysfs_ops in the struct 
sysfs_dir, in the kobject. Since objects belong to a subsystem, and is a member
of a group of like devices, the sysfs_ops have been moved to struct subsystem,
and are referenced from there.

The only remaining member of struct sysfs_dir is the dentry of the object's 
directory. That is moved out of the dir struct and directly into struct kobject.
That saves us 4 bytes/object.

All of the sysfs functions that referenced the struct have been changed to just
reference the dentry.

2 files changed, 1 insertions, 6 deletions

diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index 32dfaaf52d88..5b236b6678cb 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -18,7 +18,7 @@ struct kobject {
 	struct list_head	entry;
 	struct kobject		* parent;
 	struct subsystem	* subsys;
-	struct sysfs_dir	dir;
+	struct dentry		* dentry;
 };
 
 extern void kobject_init(struct kobject *);
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 066a9ccc0fb4..7a46c9f0c308 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -18,11 +18,6 @@ struct sysfs_ops {
 	ssize_t	(*store)(struct kobject *,struct attribute *,const char *, size_t, loff_t);
 };
 
-struct sysfs_dir {
-	struct dentry		* dentry;
-	struct sysfs_ops	* ops;
-};
-
 struct attribute {
 	char			* name;
 	mode_t			mode;