The quilt patch titled
Subject: rmap: convert page_move_anon_rmap() to use a folio
has been removed from the -mm tree. Its filename was
rmap-convert-page_move_anon_rmap-to-use-a-folio.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: rmap: convert page_move_anon_rmap() to use a folio
Date: Fri, 2 Sep 2022 20:46:45 +0100
Removes one call to compound_head() and a reference to page->mapping.
Link: https://lkml.kernel.org/r/20220902194653.1739778-50-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/rmap.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
--- a/mm/rmap.c~rmap-convert-page_move_anon_rmap-to-use-a-folio
+++ a/mm/rmap.c
@@ -1099,22 +1099,20 @@ int pfn_mkclean_range(unsigned long pfn,
*/
void page_move_anon_rmap(struct page *page, struct vm_area_struct *vma)
{
- struct anon_vma *anon_vma = vma->anon_vma;
- struct page *subpage = page;
+ void *anon_vma = vma->anon_vma;
+ struct folio *folio = page_folio(page);
- page = compound_head(page);
-
- VM_BUG_ON_PAGE(!PageLocked(page), page);
+ VM_BUG_ON_FOLIO(!folio_test_locked(folio), folio);
VM_BUG_ON_VMA(!anon_vma, vma);
- anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON;
+ anon_vma += PAGE_MAPPING_ANON;
/*
* Ensure that anon_vma and the PAGE_MAPPING_ANON bit are written
* simultaneously, so a concurrent reader (eg folio_referenced()'s
* folio_test_anon()) will not see one without the other.
*/
- WRITE_ONCE(page->mapping, (struct address_space *) anon_vma);
- SetPageAnonExclusive(subpage);
+ WRITE_ONCE(folio->mapping, anon_vma);
+ SetPageAnonExclusive(page);
}
/**
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
