+ migrate_pages-move-migrate_folio_unmap.patch added to mm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: migrate_pages: move migrate_folio_unmap()
has been added to the -mm mm-unstable branch.  Its filename is
     migrate_pages-move-migrate_folio_unmap.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/migrate_pages-move-migrate_folio_unmap.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: Huang Ying <ying.huang@intel.com>
Subject: migrate_pages: move migrate_folio_unmap()
Date: Tue, 10 Jan 2023 15:53:24 +0800

Just move the position of the functions.  There's no any functionality
change.  This is to make it easier to review the next patch via putting
code near its position in the next patch.

Link: https://lkml.kernel.org/r/20230110075327.590514-7-ying.huang@intel.com
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Bharata B Rao <bharata@amd.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: haoxin <xhao@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/migrate.c |  102 ++++++++++++++++++++++++-------------------------
 1 file changed, 51 insertions(+), 51 deletions(-)

--- a/mm/migrate.c~migrate_pages-move-migrate_folio_unmap
+++ a/mm/migrate.c
@@ -1236,6 +1236,57 @@ out:
 	return rc;
 }
 
+/* Obtain the lock on page, remove all ptes. */
+static int migrate_folio_unmap(new_page_t get_new_page, free_page_t put_new_page,
+			       unsigned long private, struct folio *src,
+			       struct folio **dstp, int force, bool force_lock,
+			       enum migrate_mode mode, enum migrate_reason reason,
+			       struct list_head *ret)
+{
+	struct folio *dst;
+	int rc = MIGRATEPAGE_UNMAP;
+	struct page *newpage = NULL;
+
+	if (!thp_migration_supported() && folio_test_transhuge(src))
+		return -ENOSYS;
+
+	if (folio_ref_count(src) == 1) {
+		/* Folio was freed from under us. So we are done. */
+		folio_clear_active(src);
+		folio_clear_unevictable(src);
+		/* free_pages_prepare() will clear PG_isolated. */
+		list_del(&src->lru);
+		migrate_folio_done(src, reason);
+		return MIGRATEPAGE_SUCCESS;
+	}
+
+	newpage = get_new_page(&src->page, private);
+	if (!newpage)
+		return -ENOMEM;
+	dst = page_folio(newpage);
+	*dstp = dst;
+
+	dst->private = NULL;
+	rc = __migrate_folio_unmap(src, dst, force, force_lock, mode);
+	if (rc == MIGRATEPAGE_UNMAP)
+		return rc;
+
+	/*
+	 * A page that has not been migrated will have kept its
+	 * references and be restored.
+	 */
+	/* restore the folio to right list. */
+	if (rc != -EAGAIN && rc != -EDEADLOCK)
+		list_move_tail(&src->lru, ret);
+
+	if (put_new_page)
+		put_new_page(&dst->page, private);
+	else
+		folio_put(dst);
+
+	return rc;
+}
+
 static int __migrate_folio_move(struct folio *src, struct folio *dst,
 				enum migrate_mode mode)
 {
@@ -1287,57 +1338,6 @@ static int __migrate_folio_move(struct f
 		folio_put(dst);
 
 	return rc;
-}
-
-/* Obtain the lock on page, remove all ptes. */
-static int migrate_folio_unmap(new_page_t get_new_page, free_page_t put_new_page,
-			       unsigned long private, struct folio *src,
-			       struct folio **dstp, int force, bool force_lock,
-			       enum migrate_mode mode, enum migrate_reason reason,
-			       struct list_head *ret)
-{
-	struct folio *dst;
-	int rc = MIGRATEPAGE_UNMAP;
-	struct page *newpage = NULL;
-
-	if (!thp_migration_supported() && folio_test_transhuge(src))
-		return -ENOSYS;
-
-	if (folio_ref_count(src) == 1) {
-		/* Folio was freed from under us. So we are done. */
-		folio_clear_active(src);
-		folio_clear_unevictable(src);
-		/* free_pages_prepare() will clear PG_isolated. */
-		list_del(&src->lru);
-		migrate_folio_done(src, reason);
-		return MIGRATEPAGE_SUCCESS;
-	}
-
-	newpage = get_new_page(&src->page, private);
-	if (!newpage)
-		return -ENOMEM;
-	dst = page_folio(newpage);
-	*dstp = dst;
-
-	dst->private = NULL;
-	rc = __migrate_folio_unmap(src, dst, force, force_lock, mode);
-	if (rc == MIGRATEPAGE_UNMAP)
-		return rc;
-
-	/*
-	 * A page that has not been migrated will have kept its
-	 * references and be restored.
-	 */
-	/* restore the folio to right list. */
-	if (rc != -EAGAIN && rc != -EDEADLOCK)
-		list_move_tail(&src->lru, ret);
-
-	if (put_new_page)
-		put_new_page(&dst->page, private);
-	else
-		folio_put(dst);
-
-	return rc;
 }
 
 /* Migrate the folio to the newly allocated folio in dst. */
_

Patches currently in -mm which might be from ying.huang@intel.com are

migrate_pages-organize-stats-with-struct-migrate_pages_stats.patch
migrate_pages-separate-hugetlb-folios-migration.patch
migrate_pages-restrict-number-of-pages-to-migrate-in-batch.patch
migrate_pages-split-unmap_and_move-to-_unmap-and-_move.patch
migrate_pages-batch-_unmap-and-_move.patch
migrate_pages-move-migrate_folio_unmap.patch
migrate_pages-share-more-code-between-_unmap-and-_move.patch
migrate_pages-batch-flushing-tlb.patch
migrate_pages-move-thp-hugetlb-migration-support-check-to-simplify-code.patch