Use a folio in do_set_pmd(), which save one compound_head() call.
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
mm/memory.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
@@ -4313,12 +4313,13 @@ vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page)
unsigned long haddr = vmf->address & HPAGE_PMD_MASK;
pmd_t entry;
vm_fault_t ret = VM_FAULT_FALLBACK;
+ struct folio *folio;
if (!transhuge_vma_suitable(vma, haddr))
return ret;
- page = compound_head(page);
- if (compound_order(page) != HPAGE_PMD_ORDER)
+ folio = page_folio(page);
+ if (folio_order(folio) != HPAGE_PMD_ORDER)
return ret;
/*
@@ -4350,7 +4351,7 @@ vm_fault_t do_set_pmd(struct vm_fault *vmf, struct page *page)
if (write)
entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma);
- add_mm_counter(vma->vm_mm, mm_counter_file(page), HPAGE_PMD_NR);
+ add_mm_counter(vma->vm_mm, mm_counter_file_folio(folio), HPAGE_PMD_NR);
page_add_file_rmap(page, vma, true);
/*