Call page_folio() a little earlier so we can use folio_mapping()
instead of page_mapping(), saving a call to compound_head().
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
mm/userfaultfd.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c
index d9dcc7d71a39..e6486923263c 100644
--- a/mm/userfaultfd.c
+++ b/mm/userfaultfd.c
@@ -180,9 +180,9 @@ int mfill_atomic_install_pte(pmd_t *dst_pmd,
pte_t _dst_pte, *dst_pte;
bool writable = dst_vma->vm_flags & VM_WRITE;
bool vm_shared = dst_vma->vm_flags & VM_SHARED;
- bool page_in_cache = page_mapping(page);
spinlock_t *ptl;
- struct folio *folio;
+ struct folio *folio = page_folio(page);
+ bool page_in_cache = folio_mapping(folio);
_dst_pte = mk_pte(page, dst_vma->vm_page_prot);
_dst_pte = pte_mkdirty(_dst_pte);
@@ -212,7 +212,6 @@ int mfill_atomic_install_pte(pmd_t *dst_pmd,
if (!pte_none_mostly(ptep_get(dst_pte)))
goto out_unlock;
- folio = page_folio(page);
if (page_in_cache) {
/* Usually, cache pages are already added to LRU */
if (newly_allocated)
--
2.43.0
