sysfs: add sysfs_dirent->s_name

Add s_name to sysfs_dirent.  This is to further reduce dependency to
the associated dentry.  Name is copied for directories and symlinks
but not for attributes.

Where possible, name dereferences are converted to use sd->s_name.
sysfs_symlink->link_name and sysfs_get_name() are unused now and
removed.

This change allows symlink to be implemented using sysfs_dirent tree
proper, which is the last remaining dentry-dependent sysfs walk.

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

1 files changed, 3 insertions, 4 deletions

diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index ce05d6fd7522..d34b008537d5 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -3,6 +3,7 @@ struct sysfs_dirent {
         struct sysfs_dirent     * s_parent;
         struct list_head        s_sibling;
         struct list_head        s_children;
+        const char              * s_name;
         void                    * s_element;
         int                     s_type;
         umode_t                 s_mode;
@@ -21,8 +22,8 @@ extern int sysfs_create(struct dentry *, int mode, int (*init)(struct inode *));
 
 extern void release_sysfs_dirent(struct sysfs_dirent * sd);
 extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
-extern struct sysfs_dirent *sysfs_new_dirent(void *element, umode_t mode,
-                                             int type);
+extern struct sysfs_dirent *sysfs_new_dirent(const char *name, void *element,
+                                             umode_t mode, int type);
 extern void sysfs_attach_dirent(struct sysfs_dirent *sd,
                                 struct sysfs_dirent *parent_sd,
                                 struct dentry *dentry);
@@ -34,7 +35,6 @@ extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * na
 extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
 extern void sysfs_remove_subdir(struct dentry *);
 
-extern const unsigned char * sysfs_get_name(struct sysfs_dirent *sd);
 extern void sysfs_drop_dentry(struct sysfs_dirent *sd, struct dentry *parent);
 extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
 
@@ -48,7 +48,6 @@ extern const struct inode_operations sysfs_dir_inode_operations;
 extern const struct inode_operations sysfs_symlink_inode_operations;
 
 struct sysfs_symlink {
-        char * link_name;
         struct kobject * target_kobj;
 };