Message ID | 20221129164352.3374638-42-Liam.Howlett@oracle.com (mailing list archive) |
---|---|
State | New |
Headers | show
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VMA type safety through VMA iterator
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diff --git a/mm/mmap.c b/mm/mmap.c index 2b41e7882639..8ca40efb82f9 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2980,6 +2980,7 @@ static int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma, unsigned long addr, unsigned long len, unsigned long flags) { struct mm_struct *mm = current->mm; + struct vma_prepare vp; validate_mm_mt(mm); /* @@ -3007,18 +3008,13 @@ static int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma, return -ENOMEM; vma_adjust_trans_huge(vma, vma->vm_start, addr + len, 0); - if (vma->anon_vma) { - anon_vma_lock_write(vma->anon_vma); - anon_vma_interval_tree_pre_update_vma(vma); - } + init_vma_prep(&vp, vma); + vma_prepare(&vp); vma->vm_end = addr + len; vma->vm_flags |= VM_SOFTDIRTY; vma_iter_store(vmi, vma); - if (vma->anon_vma) { - anon_vma_interval_tree_post_update_vma(vma); - anon_vma_unlock_write(vma->anon_vma); - } + vma_complete(&vp, vmi, mm); khugepaged_enter_vma(vma, flags); goto out; }