Handle hugetlb faults under the VMA lock & Hugetlb fault path to use struct vm_fault · Pull Request !15441 · openEuler/kernel

1. mm/hugetlb: unify restore reserve accounting for new allocations
2. mm/hugetlb: drop vma_has_reserves()
3. mm/hugetlb: simplify vma_has_reserves()
4. mm/hugetlb: clean up map/global resv accounting when allocate
5. mm/hugetlb: rename avoid_reserve to cow_from_owner
6. mm/hugetlb: stop using avoid_reserve flag in fork()
7. mm/hugetlb: fix avoid_reserve to allow taking folio from subpool
8. memcg/hugetlb: introduce mem_cgroup_charge_hugetlb
9. memcg/hugetlb: introduce memcg_accounts_hugetlb
10. mm/hugetlb.c: fix UAF of vma in hugetlb fault pathway
11. mm: change vmf_anon_prepare() to __vmf_anon_prepare()
10. hugetlb: convert hugetlb_wp() to use struct vm_fault
11. hugetlb: convert hugetlb_no_page() to use struct vm_fault
12. hugetlb: convert hugetlb_fault() to use struct vm_fault
13. hugetlb: check for anon_vma prior to folio allocation
14. hugetlb: allow faults to be handled under the VMA lock
15. hugetlb: use vmf_anon_prepare() instead of anon_vma_prepare()
16. hugetlb: pass struct vm_fault through to hugetlb_handle_userfault()
17. hugetlb: move vm_fault declaration to the top of hugetlb_fault()

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