jffs2_iget
inode = jffs2_iget(dir_i->i_sb, ino);
root_i = jffs2_iget(sb, 1);
inode = jffs2_iget(OFNI_BS_2SFFJ(c), inum);
struct inode *jffs2_iget(struct super_block *, unsigned long);
return jffs2_iget(sb, ino);
return d_obtain_alias(jffs2_iget(child->d_sb, pino));