btrfs: Code cleanup

Attaching below is some of the code cleanups that i came across while
reading the code.

a) alloc_path already calls init_path.
b) Mention that btrfs_inode is the in memory copy.Ext4 have ext4_inode_info as
the in memory copy ext4_inode as the disk copy

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index 0d179a44ebf4..ff10cf5a8422 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -74,7 +74,6 @@ int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
         ret = btrfs_name_hash(name, name_len, &key.offset);
         BUG_ON(ret);
         path = btrfs_alloc_path();
-        btrfs_init_path(path);
         data_size = sizeof(*dir_item) + name_len;
         dir_item = insert_with_overflow(trans, root, path, &key, data_size,
                                         name, name_len);