Fix comment and remove unneccessary blank.
Signed-off-by: NShijie Luo <luoshijie1@huawei.com>
Reviewed-by: NJan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200123064325.36358-1-luoshijie1@huawei.comSigned-off-by: NTheodore Ts'o <tytso@mit.edu>