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, 1 insertions, 7 deletions

diff --git a/fs/sysfs/symlink.c b/fs/sysfs/symlink.c
index d96bb9cbc9d4..c72820450e7c 100644
--- a/fs/sysfs/symlink.c
+++ b/fs/sysfs/symlink.c
@@ -57,14 +57,9 @@ static int sysfs_add_link(struct dentry * parent, const char * name, struct kobj
         if (!sl)
                 goto err_out;
 
-        sl->link_name = kmalloc(strlen(name) + 1, GFP_KERNEL);
-        if (!sl->link_name)
-                goto err_out;
-
-        strcpy(sl->link_name, name);
         sl->target_kobj = kobject_get(target);
 
-        sd = sysfs_new_dirent(sl, S_IFLNK|S_IRWXUGO, SYSFS_KOBJ_LINK);
+        sd = sysfs_new_dirent(name, sl, S_IFLNK|S_IRWXUGO, SYSFS_KOBJ_LINK);
         if (!sd)
                 goto err_out;
         sysfs_attach_dirent(sd, parent_sd, NULL);
@@ -74,7 +69,6 @@ static int sysfs_add_link(struct dentry * parent, const char * name, struct kobj
  err_out:
         if (sl) {
                 kobject_put(sl->target_kobj);
-                kfree(sl->link_name);
                 kfree(sl);
         }
         return error;