dax: revert userfaultfd change
Undo the change which "userfaultfd: call handle_userfault() for userfaultfd_missing() faults" made to set_huge_zero_page(). DAX will need that return value. Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -794,16 +794,19 @@ static inline gfp_t alloc_hugepage_gfpmask(int defrag, gfp_t extra_gfp)
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}
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/* Caller must hold page table lock. */
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static void set_huge_zero_page(pgtable_t pgtable, struct mm_struct *mm,
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static bool set_huge_zero_page(pgtable_t pgtable, struct mm_struct *mm,
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struct vm_area_struct *vma, unsigned long haddr, pmd_t *pmd,
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struct page *zero_page)
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{
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pmd_t entry;
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if (!pmd_none(*pmd))
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return false;
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entry = mk_pmd(zero_page, vma->vm_page_prot);
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entry = pmd_mkhuge(entry);
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pgtable_trans_huge_deposit(mm, pmd, pgtable);
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set_pmd_at(mm, haddr, pmd, entry);
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atomic_long_inc(&mm->nr_ptes);
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return true;
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}
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int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
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