linux-ext4 - [PATCH 15/20] balloon: Convert to migrate

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Date:   Mon,  6 Jun 2022 21:40:45 +0100
From:   "Matthew Wilcox (Oracle)" <willy@...radead.org>
To:     linux-fsdevel@...r.kernel.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-aio@...ck.org, linux-btrfs@...r.kernel.org,
        linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        cluster-devel@...hat.com, linux-mm@...ck.org,
        linux-xfs@...r.kernel.org, linux-nfs@...r.kernel.org,
        linux-ntfs-dev@...ts.sourceforge.net, ocfs2-devel@....oracle.com,
        linux-mtd@...ts.infradead.org,
        virtualization@...ts.linux-foundation.org
Subject: [PATCH 15/20] balloon: Convert to migrate_folio

This is little more than changing the types over; there's no real work
being done in this function.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 mm/balloon_compaction.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/mm/balloon_compaction.c b/mm/balloon_compaction.c
index 4b8eab4b3f45..3f75b876ad76 100644
--- a/mm/balloon_compaction.c
+++ b/mm/balloon_compaction.c
@@ -230,11 +230,10 @@ static void balloon_page_putback(struct page *page)
 
 
 /* move_to_new_page() counterpart for a ballooned page */
-static int balloon_page_migrate(struct address_space *mapping,
-		struct page *newpage, struct page *page,
-		enum migrate_mode mode)
+static int balloon_migrate_folio(struct address_space *mapping,
+		struct folio *dst, struct folio *src, enum migrate_mode mode)
 {
-	struct balloon_dev_info *balloon = balloon_page_device(page);
+	struct balloon_dev_info *balloon = balloon_page_device(&src->page);
 
 	/*
 	 * We can not easily support the no copy case here so ignore it as it
@@ -244,14 +243,14 @@ static int balloon_page_migrate(struct address_space *mapping,
 	if (mode == MIGRATE_SYNC_NO_COPY)
 		return -EINVAL;
 
-	VM_BUG_ON_PAGE(!PageLocked(page), page);
-	VM_BUG_ON_PAGE(!PageLocked(newpage), newpage);
+	VM_BUG_ON_FOLIO(!folio_test_locked(src), src);
+	VM_BUG_ON_FOLIO(!folio_test_locked(dst), dst);
 
-	return balloon->migratepage(balloon, newpage, page, mode);
+	return balloon->migratepage(balloon, &dst->page, &src->page, mode);
 }
 
 const struct address_space_operations balloon_aops = {
-	.migratepage = balloon_page_migrate,
+	.migrate_folio = balloon_migrate_folio,
 	.isolate_page = balloon_page_isolate,
 	.putback_page = balloon_page_putback,
 };
-- 
2.35.1