[merged mm-stable] mm-remove-pagewriteback.patch removed from -mm tree

[merged mm-stable] mm-remove-pagewriteback.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: remove PageWriteback
has been removed from the -mm tree.  Its filename was
     mm-remove-pagewriteback.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: Tal Zussman <tz2294@columbia.edu>
Subject: mm: remove PageWriteback
Date: Sat, 05 Sep 2026 15:08:30 -0400

The last caller of PageWriteback() was removed in commit f75987e543c2
("libceph: remove pinning assertion in ceph_msg_data_iter_next()").  This
flag is now only used on folios, so we can remove all the page accessors. 
folio_test_clear_writeback() is not used, so don't add
FOLIO_TEST_CLEAR_FLAG() for it.

Link: https://lore.kernel.org/20260905-remove-pagewriteback-v1-1-06f41c00db03@columbia.edu
Signed-off-by: Tal Zussman <tz2294@columbia.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: SJ Park <sj@kernel.org>
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
---

 include/linux/page-flags.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/include/linux/page-flags.h~mm-remove-pagewriteback
+++ a/include/linux/page-flags.h
@@ -588,8 +588,8 @@ FOLIO_FLAG(owner_2, FOLIO_HEAD_PAGE)
  * Only test-and-set exist for PG_writeback.  The unconditional operators are
  * risky: they bypass page accounting.
  */
-TESTPAGEFLAG(Writeback, writeback, PF_NO_TAIL)
-	TESTSCFLAG(Writeback, writeback, PF_NO_TAIL)
+FOLIO_TEST_FLAG(writeback, FOLIO_HEAD_PAGE)
+	FOLIO_TEST_SET_FLAG(writeback, FOLIO_HEAD_PAGE)
 FOLIO_FLAG(mappedtodisk, FOLIO_HEAD_PAGE)
 
 /* PG_readahead is only used for reads; PG_reclaim is only for writes */
_

Patches currently in -mm which might be from tz2294@columbia.edu are

mm-memcontrol-take-a-const-folio-in-folio_memcg-and-friends.patch
mm-memcontrol-constify-obj_cgroup_memcg-and-friends.patch
mm-memcontrol-constify-the-lruvec-helpers.patch
mm-page_io-take-a-const-folio-in-bio_associate_blkg_from_folio.patch
mm-memcontrol-constify-the-mem_cgroup-accessors.patch
mm-page_counter-constify-page_counter_read-and-page_counter_margin.patch
mm-memcontrol-constify-the-reclaim-protection-helpers.patch
mm-memcontrol-constify-the-memcg-and-lruvec-stat-readers.patch
mm-memcontrol-constify-the-swap-accounting-helpers.patch
mm-memcontrol-constify-mem_cgroup_swappiness-and-mem_cgroup_get_max.patch
mm-memcontrol-constify-the-zswap-and-socket-pressure-helpers.patch
vmcore-convert-mmap_vmcore_fault-to-use-folios.patch