mainline inclusion
from mainline-v5.9
commit 06a0df4d
category: bugfix
bugzilla: NA
CVE: CVE-2020-14390

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

Since the softscroll code got removed, this argument is always zero and
makes no sense any more.
Tested-by: NYuan Ming <yuanmingbuaa@gmail.com>
Tested-by: NWilly Tarreau <w@1wt.eu>
Reviewed-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Reviewed-by: NJason Yan <yanaijie@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>