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mm/mmap: convert do_brk_flags() to use vma_prepare() and vma_complete() 

Use the abstracted vma locking for do_brk_flags()

Link: https://lkml.kernel.org/r/20230120162650.984577-48-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam R. Howlett 2023-01-20 11:26:48 -05:00 committed by Andrew Morton
parent 04241ffe3f
commit 287051b185
1 changed files with 4 additions and 8 deletions
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12
mm/mmap.c
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@ -2936,6 +2936,7 @@ 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);
/*
@ -2963,18 +2964,13 @@ static int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma,
goto unacct_fail;
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;
}