Revert "mm, sl[aou]b: guarantee natural alignment for kmalloc(power-of-two)"

hulk inclusion
category: bugfix
bugzilla: 51349
CVE: NA

-------------------------------------------------

This patchset https://patchwork.kernel.org/project/linux-block/cover/20190826111627.7505-1-vbabka@suse.cz/


will cause perfmance regression, so revert it and use another way to fix the
warning introduced by fix CVE-2021-27365.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>