namei: use QSTR() instead of QSTR_INIT() in path_pts

Drop the hard-coded length argument and use the simpler QSTR(). Inline
the code and drop the local variable.

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20260505114242.158883-2-thorsten.blum@linux.dev
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

fs/namei.c

@@ -3603,7 +3603,6 @@ int path_pts(struct path *path)
 	 */
 	struct dentry *parent = dget_parent(path->dentry);
 	struct dentry *child;
-	struct qstr this = QSTR_INIT("pts", 3);
 
 	if (unlikely(!path_connected(path->mnt, parent))) {
 		dput(parent);
@@ -3611,7 +3610,7 @@ int path_pts(struct path *path)
 	}
 	dput(path->dentry);
 	path->dentry = parent;
-	child = d_hash_and_lookup(parent, &this);
+	child = d_hash_and_lookup(parent, &QSTR("pts"));
 	if (IS_ERR_OR_NULL(child))
 		return -ENOENT;