[PATCH 01/15] mm/khugepaged: drop redundant page parameter from set_huge_pmd()

[Nilay Vaish <nilayvaish@google.com>]

As part of the memdescs effort, struct folio will be allocated
separately from struct page and will no longer overlay the head page.

set_huge_pmd() is a static helper with a single caller that passes both
'folio' and '&folio->page'. Drop the redundant struct page parameter and
pass folio_page(folio, 0) to do_set_pmd() so khugepaged no longer
references folio->page directly.

No functional change intended.

Assisted-by: LLM
Signed-off-by: Nilay Vaish <nilayvaish@google.com>
---
 mm/khugepaged.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 913086eaf17b..63acb13f24eb 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1793,7 +1793,7 @@ static void collect_mm_slot(struct mm_slot *slot)
 
 /* folio must be locked, and mmap_lock must be held */
 static enum scan_result set_huge_pmd(struct vm_area_struct *vma, unsigned long addr,
-		pmd_t *pmdp, struct folio *folio, struct page *page)
+		pmd_t *pmdp, struct folio *folio)
 {
 	struct mm_struct *mm = vma->vm_mm;
 	struct vm_fault vmf = {
@@ -1821,7 +1821,7 @@ static enum scan_result set_huge_pmd(struct vm_area_struct *vma, unsigned long a
 	}
 
 	vmf.pmd = pmdp;
-	if (do_set_pmd(&vmf, folio, page))
+	if (do_set_pmd(&vmf, folio, folio_page(folio, 0)))
 		return SCAN_FAIL;
 
 	folio_get(folio);
@@ -2032,7 +2032,7 @@ static enum scan_result try_collapse_pte_mapped_thp(struct mm_struct *mm, unsign
 maybe_install_pmd:
 	/* step 5: install pmd entry */
 	result = install_pmd
-			? set_huge_pmd(vma, haddr, pmd, folio, &folio->page)
+			? set_huge_pmd(vma, haddr, pmd, folio)
 			: SCAN_SUCCEED;
 	goto drop_folio;
 abort:
-- 
2.56.0.rc1.315.gc6ed9934b7-goog