[PATCH 06/20] btrfs: Convert btree_migratepage to migrate_folio

Matthew Wilcox (Oracle)
2022-06-06T20:49:38Z

Use a folio throughout this function. migrate_page() will be converted
later.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
fs/btrfs/disk-io.c | 22 ++++++++++------------
1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 12b11e645c14..9ceb73f683af 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -952,28 +952,28 @@ void btrfs_submit_metadata_bio(struct inode *inode, struct bio *bio, int mirror_
}

#ifdef CONFIG_MIGRATION
-static int btree_migratepage(struct address_space *mapping,
- struct page *newpage, struct page *page,
- enum migrate_mode mode)
+static int btree_migrate_folio(struct address_space *mapping,
+ struct folio *dst, struct folio *src, enum migrate_mode mode)
{
/*
* we can't safely write a btree page from here,
* we haven't done the locking hook
*/
- if (PageDirty(page))
+ if (folio_test_dirty(src))
return -EAGAIN;
/*
* Buffers may be managed in a filesystem specific way.
* We must have no buffers or drop them.
*/
- if (page_has_private(page) &&
- !try_to_release_page(page, GFP_KERNEL))
+ if (folio_get_private(src) &&
+ !filemap_release_folio(src, GFP_KERNEL))
return -EAGAIN;
- return migrate_page(mapping, newpage, page, mode);
+ return migrate_page(mapping, &dst->page, &src->page, mode);
}
+#else
+#define btree_migrate_folio NULL
#endif

-
static int btree_writepages(struct address_space *mapping,
struct writeback_control *wbc)
{
@@ -1073,10 +1073,8 @@ static const struct address_space_operations btree_aops = {
.writepages = btree_writepages,
.release_folio = btree_release_folio,
.invalidate_folio = btree_invalidate_folio,
-#ifdef CONFIG_MIGRATION
- .migratepage = btree_migratepage,
-#endif
- .dirty_folio = btree_dirty_folio,
+ .migrate_folio = btree_migrate_folio,
+ .dirty_folio = btree_dirty_folio,
};

struct extent_buffer *btrfs_find_create_tree_block(
--
2.35.1