kernfs_get_inode
inode = kernfs_get_inode(dir->i_sb, kn);
inode = kernfs_get_inode(sb, kn);
return d_obtain_alias(kernfs_get_inode(child->d_sb, kernfs_parent(kn)));
inode = kernfs_get_inode(sb, info->root->kn);
struct inode *kernfs_get_inode(struct super_block *sb, struct kernfs_node *kn);
inode = kernfs_get_inode(sb, cgrp->procs_file.kn);