dquot: cleanup dquot initialize routine

Get rid of the initialize dquot operation - it is now always called from
the filesystem and if a filesystem really needs it's own (which none
currently does) it can just call into it's own routine directly.

Rename the now static low-level dquot_initialize helper to __dquot_initialize
and vfs_dq_init to dquot_initialize to have a consistent namespace.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 0163d0d..e844acc 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -752,7 +752,6 @@
 				const char *data, size_t len, loff_t off);
 
 static const struct dquot_operations ext3_quota_operations = {
-	.initialize	= dquot_initialize,
 	.write_dquot	= ext3_write_dquot,
 	.acquire_dquot	= ext3_acquire_dquot,
 	.release_dquot	= ext3_release_dquot,
@@ -1480,7 +1479,7 @@
 		}
 
 		list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
-		vfs_dq_init(inode);
+		dquot_initialize(inode);
 		if (inode->i_nlink) {
 			printk(KERN_DEBUG
 				"%s: truncating inode %lu to %Ld bytes\n",
@@ -2736,7 +2735,7 @@
  * Process 1                         Process 2
  * ext3_create()                     quota_sync()
  *   journal_start()                   write_dquot()
- *   vfs_dq_init()                       down(dqio_mutex)
+ *   dquot_initialize()                       down(dqio_mutex)
  *     down(dqio_mutex)                    journal_start()
  *
  */