[PATCH 1/7] extfat: remove ->writepage

[Christoph Hellwig <hch@lst.de>]

->writepage is a very inefficient method to write back data, and only
used through write_cache_pages or a a fallback when no ->migrate_folio
method is present.

Set ->migrate_folio to the generic buffer_head based helper, and remove
the ->writepage implementation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
---
 fs/exfat/inode.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/fs/exfat/inode.c b/fs/exfat/inode.c
index 5590a1e83126c9..eac95bcd9a8aae 100644
--- a/fs/exfat/inode.c
+++ b/fs/exfat/inode.c
@@ -345,11 +345,6 @@ static void exfat_readahead(struct readahead_control *rac)
 	mpage_readahead(rac, exfat_get_block);
 }
 
-static int exfat_writepage(struct page *page, struct writeback_control *wbc)
-{
-	return block_write_full_page(page, exfat_get_block, wbc);
-}
-
 static int exfat_writepages(struct address_space *mapping,
 		struct writeback_control *wbc)
 {
@@ -473,12 +468,12 @@ static const struct address_space_operations exfat_aops = {
 	.invalidate_folio = block_invalidate_folio,
 	.read_folio	= exfat_read_folio,
 	.readahead	= exfat_readahead,
-	.writepage	= exfat_writepage,
 	.writepages	= exfat_writepages,
 	.write_begin	= exfat_write_begin,
 	.write_end	= exfat_write_end,
 	.direct_IO	= exfat_direct_IO,
-	.bmap		= exfat_aop_bmap
+	.bmap		= exfat_aop_bmap,
+	.migrate_folio	= buffer_migrate_folio,
 };
 
 static inline unsigned long exfat_hash(loff_t i_pos)
-- 
2.30.2