xattr_find_entry
error = xattr_find_entry(inode, &bs->s.here, bs->s.end,
error = xattr_find_entry(inode, &is->s.here, is->s.end,
error = xattr_find_entry(inode, &entry, end, name_index, name, 1);
error = xattr_find_entry(inode, &entry, end, name_index, name, 0);