+ jfs-implement-migrate_folio-for-jfs_metapage_aops-fix-2.patch added to mm-unstable branch

+ jfs-implement-migrate_folio-for-jfs_metapage_aops-fix-2.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: jfs-implement-migrate_folio-for-jfs_metapage_aops-fix-2
has been added to the -mm mm-unstable branch.  Its filename is
     jfs-implement-migrate_folio-for-jfs_metapage_aops-fix-2.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/jfs-implement-migrate_folio-for-jfs_metapage_aops-fix-2.patch

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

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------------------------------------------------------
From: Andrew Morton <akpm@linux-foundation.org>
Subject: jfs-implement-migrate_folio-for-jfs_metapage_aops-fix-2
Date: Thu May  1 03:52:07 PM PDT 2025

fix build by making fs/jfs/jfs_metapage.c change dependent upon
CONFIG_MIGRATION

Cc: Alistair Popple <apopple@nvidia.com>
Cc: Dave Kleikamp <shaggy@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Donet Tom <donettom@linux.ibm.com>
Cc: Jane Chu <jane.chu@oracle.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Shivank Garg <shivankg@amd.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/jfs/jfs_metapage.c |   24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

--- a/fs/jfs/jfs_metapage.c~jfs-implement-migrate_folio-for-jfs_metapage_aops-fix-2
+++ a/fs/jfs/jfs_metapage.c
@@ -152,8 +152,10 @@ static inline void dec_io(struct folio *
 		handler(folio, anchor->status);
 }
 
-static int __metapage_migrate_folio(struct address_space *mapping, struct folio *dst,
-				    struct folio *src, enum migrate_mode mode)
+#ifdef CONFIG_MIGRATION
+static int __metapage_migrate_folio(struct address_space *mapping,
+				    struct folio *dst, struct folio *src,
+				    enum migrate_mode mode)
 {
 	struct meta_anchor *src_anchor = src->private;
 	struct metapage *mps[MPS_PER_PAGE] = {0};
@@ -199,8 +201,10 @@ static int __metapage_migrate_folio(stru
 
 	return MIGRATEPAGE_SUCCESS;
 }
+#endif	/* CONFIG_MIGRATION */
 
 #else
+
 static inline struct metapage *folio_to_mp(struct folio *folio, int offset)
 {
 	return folio->private;
@@ -224,8 +228,10 @@ static inline void remove_metapage(struc
 #define inc_io(folio) do {} while(0)
 #define dec_io(folio, status, handler) handler(folio, status)
 
-static int __metapage_migrate_folio(struct address_space *mapping, struct folio *dst,
-				    struct folio *src, enum migrate_mode mode)
+#ifdef CONFIG_MIGRATION
+static int __metapage_migrate_folio(struct address_space *mapping,
+				    struct folio *dst, struct folio *src,
+				    enum migrate_mode mode)
 {
 	struct metapage *mp;
 	int page_offset;
@@ -249,6 +255,7 @@ static int __metapage_migrate_folio(stru
 
 	return MIGRATEPAGE_SUCCESS;
 }
+#endif	/* CONFIG_MIGRATION */
 
 #endif
 
@@ -629,11 +636,13 @@ static bool metapage_release_folio(struc
 	return ret;
 }
 
+#ifdef CONFIG_MIGRATION
 /*
  * metapage_migrate_folio - Migration function for JFS metapages
  */
-static int metapage_migrate_folio(struct address_space *mapping, struct folio *dst,
-				  struct folio *src, enum migrate_mode mode)
+static int metapage_migrate_folio(struct address_space *mapping,
+				  struct folio *dst, struct folio *src,
+				  enum migrate_mode mode)
 {
 	int expected_count;
 
@@ -646,6 +655,9 @@ static int metapage_migrate_folio(struct
 		return -EAGAIN;
 	return __metapage_migrate_folio(mapping, dst, src, mode);
 }
+#else
+#define metapage_migrate_folio NULL
+#endif	/* CONFIG_MIGRATION */
 
 static void metapage_invalidate_folio(struct folio *folio, size_t offset,
 				    size_t length)
_

Patches currently in -mm which might be from akpm@linux-foundation.org are

x86-disable-image-size-check-for-test-builds-fix.patch
x86-disable-image-size-check-for-test-builds-fix-fix.patch
mm-debug-fix-parameter-passed-to-page_mapcount_is_type-fix.patch
vmalloc-switch-to-for_each_vmap_node-helper-fix.patch
mm-selftests-add-a-test-to-verify-mmap_changing-race-with-eagain-checkpatch-fixes.patch
jfs-implement-migrate_folio-for-jfs_metapage_aops-fix-2.patch
mm-add-zblock-allocator-fix.patch
mm-zblock-avoid-failing-the-build-fix.patch
mm-establish-mm-vma_execc-for-shared-exec-mm-vma-functionality-fix.patch
mm-perform-vma-allocation-freeing-duplication-in-mm-fix.patch
filemap-do-not-use-folio_contains-for-swap-cache-folios-fix.patch
compiler_typesh-fix-unused-variable-in-__compiletime_assert-fix.patch