ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4EUVI
CVE: NA

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We find there are two differnt errnos returned when do_mm_polulate is
called and current thread is being killed, which may confuse logger
readers.

1. do_mm_populate -> populate_vma_page_range -> __get_user_pages.
if fatal_signal_pending fails, return -ERESTARTSYS(-512).
2. __get_user_pages -> follow_hugetlb_page.
if fatal_signal_pending fails, return -EFAULT(-14).

So we call fatal_signal_pending after do_mm_populte fails in share pool
and give info about the thread killing event.
Signed-off-by: NTang Yizhou <tangyizhou@huawei.com>
Reviewed-by: NDing Tianhong <dingtianhong@huawei.com>
Reviewed-by: NKefeng  Wang <wangkefeng.wang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Reviewed-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>