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Lets create a simple helper function to keep th= e > code clean and readable. > > Suggested-by: Lorenzo Stoakes > Signed-off-by: Nico Pache > --- > mm/khugepaged.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/mm/khugepaged.c b/mm/khugepaged.c > index 8599c7fa112e..9c041141b2e3 100644 > --- a/mm/khugepaged.c > +++ b/mm/khugepaged.c > @@ -338,6 +338,11 @@ static bool pte_none_or_zero(pte_t pte) > return pte_present(pte) && is_zero_pfn(pte_pfn(pte)); > } > > +static bool is_mthp_order(unsigned int order) > +{ > + return order !=3D HPAGE_PMD_ORDER; > +} > + The code at the bottom of __folio_split() in mm/huge_memory.c can use this helper. The code in deferred_split_folio() uses folio_test_pmd_mappable() instead of order =3D=3D HPAGE_PMD_ORDER, but the code can be changed to use the helper. > int hugepage_madvise(struct vm_area_struct *vma, > vm_flags_t *vm_flags, int advice) > { > @@ -1071,13 +1076,13 @@ static int alloc_charge_folio(struct folio **fo= liop, struct mm_struct *mm, > folio =3D __folio_alloc(gfp, order, node, &cc->alloc_nmask); > if (!folio) { > *foliop =3D NULL; > - if (order =3D=3D HPAGE_PMD_ORDER) > + if (!is_mthp_order(order)) > count_vm_event(THP_COLLAPSE_ALLOC_FAILED); > count_mthp_stat(order, MTHP_STAT_COLLAPSE_ALLOC_FAILED); > return SCAN_ALLOC_HUGE_PAGE_FAIL; > } > > - if (order =3D=3D HPAGE_PMD_ORDER) > + if (!is_mthp_order(order)) > count_vm_event(THP_COLLAPSE_ALLOC); > count_mthp_stat(order, MTHP_STAT_COLLAPSE_ALLOC); > > -- = > 2.51.1 Best Regards, Yan, Zi