btrfs: fixes for kobject changes in mainline

Here's a patch against the unstable tree that gets the code to build
against Linus's current tree (2.6.24-git12).  This is needed as the
kobject/kset api has changed there.

I tried to make the smallest changes needed, and it builds and loads
successfully, but I don't have a btrfs volume anywhere (yet) to try to
see if things still work properly :)

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 15 insertions, 24 deletions

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index cd673ca9bb98..973d56e05698 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -184,7 +184,8 @@ static struct kobj_type btrfs_super_ktype = {
         .release        = btrfs_super_release,
 };
 
-static struct kset btrfs_kset;
+/* /sys/fs/btrfs/ entry */
+static struct kset *btrfs_kset;
 
 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs)
 {
@@ -208,14 +209,9 @@ int btrfs_sysfs_add_super(struct btrfs_fs_info *fs)
         }
         name[len] = '\0';
 
-        fs->super_kobj.kset = &btrfs_kset;
-        fs->super_kobj.ktype = &btrfs_super_ktype;
-
-        error = kobject_set_name(&fs->super_kobj, "%s", name);
-        if (error)
-                goto fail;
-
-        error = kobject_register(&fs->super_kobj);
+        fs->super_kobj.kset = btrfs_kset;
+        error = kobject_init_and_add(&fs->super_kobj, &btrfs_super_ktype,
+                                     NULL, "%s", name);
         if (error)
                 goto fail;
 
@@ -232,15 +228,9 @@ int btrfs_sysfs_add_root(struct btrfs_root *root)
 {
         int error;
 
-        root->root_kobj.ktype = &btrfs_root_ktype;
-        root->root_kobj.parent = &root->fs_info->super_kobj;
-
-        error = kobject_set_name(&root->root_kobj, "%s", root->name);
-        if (error) {
-                goto fail;
-        }
-
-        error = kobject_register(&root->root_kobj);
+        error = kobject_init_and_add(&root->root_kobj, &btrfs_root_ktype,
+                                     &root->fs_info->super_kobj,
+                                     "%s", root->name);
         if (error)
                 goto fail;
 
@@ -253,24 +243,25 @@ fail:
 
 void btrfs_sysfs_del_root(struct btrfs_root *root)
 {
-        kobject_unregister(&root->root_kobj);
+        kobject_put(&root->root_kobj);
         wait_for_completion(&root->kobj_unregister);
 }
 
 void btrfs_sysfs_del_super(struct btrfs_fs_info *fs)
 {
-        kobject_unregister(&fs->super_kobj);
+        kobject_put(&fs->super_kobj);
         wait_for_completion(&fs->kobj_unregister);
 }
 
 int btrfs_init_sysfs()
 {
-        kobj_set_kset_s(&btrfs_kset, fs_subsys);
-        kobject_set_name(&btrfs_kset.kobj, "btrfs");
-        return kset_register(&btrfs_kset);
+        btrfs_kset = kset_create_and_add("btrfs", NULL, fs_kobj);
+        if (!btrfs_kset)
+                return -ENOMEM;
+        return 0;
 }
 
 void btrfs_exit_sysfs()
 {
-        kset_unregister(&btrfs_kset);
+        kset_unregister(btrfs_kset);
 }