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Btrfs: remove unnecessary dget_parent/dput when creating the pending snapshot

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Since we have grabbed the parent inode at the beginning of the
snapshot creation, and both sync and async snapshot creation
release it after the pending snapshots are actually created,
it is safe to access the parent inode directly during the snapshot
creation, we needn't use dget_parent/dput to fix the parent dentry
and get the dir inode.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Miao Xie
2013-02-28 10:01:15 +00:00
committed by Josef Bacik
parent 2d8946c597
commit e9662f701c
3 changed files with 8 additions and 8 deletions
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5
fs/btrfs/transaction.c
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@@ -1068,7 +1068,6 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
struct inode *parent_inode;
struct btrfs_path *path;
struct btrfs_dir_item *dir_item;
struct dentry *parent;
struct dentry *dentry;
struct extent_buffer *tmp;
struct extent_buffer *old;
@@ -1126,8 +1125,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
trans->bytes_reserved = trans->block_rsv->reserved;
dentry = pending->dentry;
parent = dget_parent(dentry);
parent_inode = parent->d_inode;
parent_inode = pending->dir;
parent_root = BTRFS_I(parent_inode)->root;
record_root_in_trans(trans, parent_root);
@@ -1275,7 +1273,6 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
if (ret)
btrfs_abort_transaction(trans, root, ret);
fail:
dput(parent);
trans->block_rsv = rsv;
trans->bytes_reserved = 0;
no_free_objectid: