mainline inclusion
from mainline-v6.0-rc1
commit dce6098b
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5OHOB
CVE: NA

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

We test 20 million times of getcpu(), the real syscall version take 25
seconds, while the vsyscall version take only 2.4 seconds.
Signed-off-by: NRui Wang <wangrui@loongson.cn>
Signed-off-by: NHuacai Chen <chenhuacai@loongson.cn>