mainline inclusion
from mainline-5.2-rc1
commit fb203751099eecf145317685ee480a51e5b246de
category: bugfix
bugzilla: 25031
CVE: NA
---------------------------

At the beginning, nblocks has been assigned. There is no need
to repeat the assignment in the while loop, and remove it.
Signed-off-by: NLiu Song <liu.song11@zte.com.cn>
Signed-off-by: NTheodore Ts'o <tytso@mit.edu>
Reviewed-by: NJan Kara <jack@suse.cz>
Signed-off-by: Nzhangyi (F) <yi.zhang@huawei.com>
Reviewed-by: NYang Erkun <yangerkun@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>