kernfs_ino
struct inode *inode = ilookup(info->sb, kernfs_ino(kn));
ino_t ino = kernfs_ino(pos);
idr_remove(&root->ino_idr, (u32)kernfs_ino(kn));
idr_remove(&root->ino_idr, (u32)kernfs_ino(kn));
if (kernfs_ino(kn) != ino)
inode = ilookup(info->sb, kernfs_ino(kn));
p_inode = ilookup(info->sb, kernfs_ino(parent));
inode = iget_locked(sb, kernfs_ino(kn));
return kernfs_ino(cgrp->kn);