From 9ea9dc1606be5bc73f636f43c4547953f4925416 Mon Sep 17 00:00:00 2001 From: Tal Zussman Date: Sat, 5 Sep 2026 15:08:30 -0400 Subject: [PATCH] mm: remove PageWriteback 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 Signed-off-by: Andrew Morton Reviewed-by: SJ Park Reviewed-by: Lorenzo Stoakes (ARM) Acked-by: David Hildenbrand (Arm) Cc: Liam R. Howlett Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Suren Baghdasaryan Cc: Vlastimil Babka --- include/linux/page-flags.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 3dc79c0c5adf..86dd0470da11 100644 --- a/include/linux/page-flags.h +++ b/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 */