+ mm-rmap-inline-folio_test_large_maybe_mapped_shared-into-callers.patch added to mm-new branch

+ mm-rmap-inline-folio_test_large_maybe_mapped_shared-into-callers.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: mm/rmap: inline folio_test_large_maybe_mapped_shared() into callers
has been added to the -mm mm-new branch.  Its filename is
     mm-rmap-inline-folio_test_large_maybe_mapped_shared-into-callers.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-rmap-inline-folio_test_large_maybe_mapped_shared-into-callers.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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patches, and acceptance into mm-new is a notification for others take
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------------------------------------------------------
From: Lance Yang <lance.yang@linux.dev>
Subject: mm/rmap: inline folio_test_large_maybe_mapped_shared() into callers
Date: Thu, 24 Apr 2025 23:56:06 +0800

To prevent the function from being used when CONFIG_MM_ID is disabled, we
intend to inline it into its few callers, which also would help maintain
the expected code placement.

Link: https://lkml.kernel.org/r/20250424155606.57488-1-lance.yang@linux.dev
Signed-off-by: Lance Yang <lance.yang@linux.dev>
Suggested-by: David Hildenbrand <david@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Mingzhe Yang <mingzhe.yang@ly.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/mm.h         |    2 +-
 include/linux/page-flags.h |    4 ----
 include/linux/rmap.h       |    2 +-
 mm/memory.c                |    4 ++--
 4 files changed, 4 insertions(+), 8 deletions(-)

--- a/include/linux/mm.h~mm-rmap-inline-folio_test_large_maybe_mapped_shared-into-callers
+++ a/include/linux/mm.h
@@ -2111,7 +2111,7 @@ static inline bool folio_maybe_mapped_sh
 	 */
 	if (mapcount <= 1)
 		return false;
-	return folio_test_large_maybe_mapped_shared(folio);
+	return test_bit(FOLIO_MM_IDS_SHARED_BITNUM, &folio->_mm_ids);
 }
 
 #ifndef HAVE_ARCH_MAKE_FOLIO_ACCESSIBLE
--- a/include/linux/page-flags.h~mm-rmap-inline-folio_test_large_maybe_mapped_shared-into-callers
+++ a/include/linux/page-flags.h
@@ -1230,10 +1230,6 @@ static inline int folio_has_private(cons
 	return !!(folio->flags & PAGE_FLAGS_PRIVATE);
 }
 
-static inline bool folio_test_large_maybe_mapped_shared(const struct folio *folio)
-{
-	return test_bit(FOLIO_MM_IDS_SHARED_BITNUM, &folio->_mm_ids);
-}
 #undef PF_ANY
 #undef PF_HEAD
 #undef PF_NO_TAIL
--- a/include/linux/rmap.h~mm-rmap-inline-folio_test_large_maybe_mapped_shared-into-callers
+++ a/include/linux/rmap.h
@@ -223,7 +223,7 @@ static inline void __folio_large_mapcoun
 	VM_WARN_ON_ONCE(folio_mm_id(folio, 1) != MM_ID_DUMMY &&
 			folio->_mm_id_mapcount[1] < 0);
 	VM_WARN_ON_ONCE(!folio_mapped(folio) &&
-			folio_test_large_maybe_mapped_shared(folio));
+			test_bit(FOLIO_MM_IDS_SHARED_BITNUM, &folio->_mm_ids));
 }
 
 static __always_inline void folio_set_large_mapcount(struct folio *folio,
--- a/mm/memory.c~mm-rmap-inline-folio_test_large_maybe_mapped_shared-into-callers
+++ a/mm/memory.c
@@ -3768,7 +3768,7 @@ static bool __wp_can_reuse_large_anon_fo
 	 * If all folio references are from mappings, and all mappings are in
 	 * the page tables of this MM, then this folio is exclusive to this MM.
 	 */
-	if (folio_test_large_maybe_mapped_shared(folio))
+	if (test_bit(FOLIO_MM_IDS_SHARED_BITNUM, &folio->_mm_ids))
 		return false;
 
 	VM_WARN_ON_ONCE(folio_test_ksm(folio));
@@ -3791,7 +3791,7 @@ static bool __wp_can_reuse_large_anon_fo
 	folio_lock_large_mapcount(folio);
 	VM_WARN_ON_ONCE(folio_large_mapcount(folio) < folio_ref_count(folio));
 
-	if (folio_test_large_maybe_mapped_shared(folio))
+	if (test_bit(FOLIO_MM_IDS_SHARED_BITNUM, &folio->_mm_ids))
 		goto unlock;
 	if (folio_large_mapcount(folio) != folio_ref_count(folio))
 		goto unlock;
_

Patches currently in -mm which might be from lance.yang@linux.dev are

mm-rmap-inline-folio_test_large_maybe_mapped_shared-into-callers.patch