mm/hugetlb: pass folio instead of page to unmap_ref_private()

Patch series "Let unmap_hugepage_range() and several related functions
take folio instead of page", v4.


This patch (of 4):

unmap_ref_private() has only a single user, which passes in &folio->page. 
Let it take the folio directly.

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Fan Ni <[email protected]>
Reviewed-by: Muchun Song <[email protected]>
Reviewed-by: Sidhartha Kumar <[email protected]>
Reviewed-by: Oscar Salvador <[email protected]>
Reviewed-by: Matthew Wilcox (Oracle) <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: "Vishal Moola (Oracle)" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: fancxl

mm/hugetlb.c

@@ -6071,7 +6071,7 @@ void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
  * same region.
  */
 static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
-			      struct page *page, unsigned long address)
+			      struct folio *folio, unsigned long address)
 {
 	struct hstate *h = hstate_vma(vma);
 	struct vm_area_struct *iter_vma;
@@ -6115,7 +6115,8 @@ static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
 		 */
 		if (!is_vma_resv_set(iter_vma, HPAGE_RESV_OWNER))
 			unmap_hugepage_range(iter_vma, address,
-					     address + huge_page_size(h), page, 0);
+					     address + huge_page_size(h),
+					     &folio->page, 0);
 	}
 	i_mmap_unlock_write(mapping);
 }
@@ -6238,8 +6239,7 @@ static vm_fault_t hugetlb_wp(struct folio *pagecache_folio,
 			hugetlb_vma_unlock_read(vma);
 			mutex_unlock(&hugetlb_fault_mutex_table[hash]);
 
-			unmap_ref_private(mm, vma, &old_folio->page,
-					vmf->address);
+			unmap_ref_private(mm, vma, old_folio, vmf->address);
 
 			mutex_lock(&hugetlb_fault_mutex_table[hash]);
 			hugetlb_vma_lock_read(vma);