[PATCH 24/53] afs: use d_duplicate()

[NeilBrown]

From: NeilBrown <neil at brown.name>

To prepare for d_alloc_parallel() being permitted without a directory
lock, use d_duplicate() when duplicating a dentry in order to create a
whiteout.

Signed-off-by: NeilBrown <neil at brown.name>
---
 fs/afs/dir.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index c195ee851191..b5c593f50079 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -2047,6 +2047,8 @@ static void afs_rename_put(struct afs_operation *op)
 	if (op->rename.unblock)
 		store_release_wake_up(&op->rename.unblock->d_fsdata, NULL);
 	store_release_wake_up(&op->dentry->d_fsdata, NULL);
+	if (op->rename.tmp)
+		d_lookup_done(op->rename.tmp);
 	dput(op->rename.tmp);
 }
 
@@ -2175,8 +2177,7 @@ static int afs_rename(struct mnt_idmap *idmap, struct inode *old_dir,
 			if (d_count(new_dentry) > 2) {
 				spin_unlock(&new_dentry->d_lock);
 				/* copy the target dentry's name */
-				op->rename.tmp = d_alloc(new_dentry->d_parent,
-							 &new_dentry->d_name);
+				op->rename.tmp = d_duplicate(new_dentry);
 				if (!op->rename.tmp) {
 					afs_op_nomem(op);
 					goto error;
-- 
2.50.0.107.gf914562f5916.dirty