[PATCH RFC 23/29] mm/page-alloc: remove PageMappingFlags()
From: David Hildenbrand <hidden>
Date: 2025-06-18 17:42:49
Also in:
linux-doc, linux-fsdevel, linux-mm, linuxppc-dev, lkml
Subsystem:
memory management, memory management - page allocator, the rest · Maintainers:
Andrew Morton, Vlastimil Babka, Linus Torvalds
We can now simply check for PageAnon() and remove PageMappingFlags(). ... and while at it, use the folio instead and operate on folio->mapping. Signed-off-by: David Hildenbrand <redacted> --- include/linux/page-flags.h | 5 ----- mm/page_alloc.c | 7 +++---- 2 files changed, 3 insertions(+), 9 deletions(-)
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index abed972e902e1..f539bd5e14200 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h@@ -723,11 +723,6 @@ static __always_inline bool folio_mapping_flags(const struct folio *folio) return ((unsigned long)folio->mapping & PAGE_MAPPING_FLAGS) != 0; } -static __always_inline bool PageMappingFlags(const struct page *page) -{ - return ((unsigned long)page->mapping & PAGE_MAPPING_FLAGS) != 0; -} - static __always_inline bool folio_test_anon(const struct folio *folio) { return ((unsigned long)folio->mapping & PAGE_MAPPING_ANON) != 0;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a134b9fa9520e..a0ebcc5f54bb2 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c@@ -1375,10 +1375,9 @@ __always_inline bool free_pages_prepare(struct page *page, (page + i)->flags &= ~PAGE_FLAGS_CHECK_AT_PREP; } } - if (PageMappingFlags(page)) { - if (PageAnon(page)) - mod_mthp_stat(order, MTHP_STAT_NR_ANON, -1); - page->mapping = NULL; + if (folio_test_anon(folio)) { + mod_mthp_stat(order, MTHP_STAT_NR_ANON, -1); + folio->mapping = NULL; } if (unlikely(page_has_type(page))) page->page_type = UINT_MAX;
--
2.49.0