On 12/1/21 15:29, Liam Howlett wrote:
> From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
>
> vma_lookup() will walk the vma tree once and not continue to look for
> the next vma. Since the exact vma is checked below, this is a more
> optimal way of searching.
>
> Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reviewed-by: Vlastimil Babka <vbabka@xxxxxxx>
> ---
> mm/khugepaged.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/mm/khugepaged.c b/mm/khugepaged.c
> index e99101162f1a..0ff7d72cdd1d 100644
> --- a/mm/khugepaged.c
> +++ b/mm/khugepaged.c
> @@ -1433,7 +1433,7 @@ static int khugepaged_add_pte_mapped_thp(struct mm_struct *mm,
> void collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr)
> {
> unsigned long haddr = addr & HPAGE_PMD_MASK;
> - struct vm_area_struct *vma = find_vma(mm, haddr);
> + struct vm_area_struct *vma = vma_lookup(mm, haddr);
> struct page *hpage;
> pte_t *start_pte, *pte;
> pmd_t *pmd, _pmd;
