ascend inclusion
category: feature
bugzilla: NA
CVE: NA

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The do_mmap/mmap_region/__mm_populate could only be used to handle the
current process, now the share pool need to handle the other process
and create memory mmaping, so need to export new function to distinguish
different process and handle it, it would not break the current logic
and only valid for share pool.

The share pool need to remap the vmalloc pages to user space, so
introduce the hugetlb_insert_hugepage to support hugepage remapming.
Signed-off-by: NTang Yizhou <tangyizhou@huawei.com>
Signed-off-by: NLi Ming <limingming.li@huawei.com>
Signed-off-by: NZefan Li <lizefan@huawei.com>
Signed-off-by: NZhou Guanghui <zhouguanghui1@huawei.com>
Signed-off-by: NDing Tianhong <dingtianhong@huawei.com>
Reviewed-by: NKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>