hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5GB28
CVE: NA

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Add copy_{to, from}_user() to machine check safe.

If copy fail due to hardware memory error, only the relevant processes are
affected, so killing the user process and isolate the user page with
hardware memory errors is a more reasonable choice than kernel panic.
Signed-off-by: NTong Tiangen <tongtiangen@huawei.com>