Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Christoph Hellwig <hch@lst.de>
To:     Namjae Jeon <linkinjeon@kernel.org>,
        Sungjong Seo <sj1557.seo@samsung.com>,
        Jan Kara <jack@suse.com>,
        OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
        Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>,
        Dave Kleikamp <shaggy@kernel.org>,
        Bob Copeland <me@bobcopeland.com>
Cc:     linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
        jfs-discussion@lists.sourceforge.net,
        linux-karma-devel@lists.sourceforge.net, linux-mm@kvack.org
Subject: [PATCH 6/9] hpfs: remove ->writepage
Date:   Sun, 13 Nov 2022 17:28:59 +0100
Message-Id: <20221113162902.883850-7-hch@lst.de>
In-Reply-To: <20221113162902.883850-1-hch@lst.de>
References: <20221113162902.883850-1-hch@lst.de>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

->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>
---
 fs/hpfs/file.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index f7547a62c81f6..88952d4a631e6 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -163,11 +163,6 @@ static int hpfs_read_folio(struct file *file, struct folio *folio)
 	return mpage_read_folio(folio, hpfs_get_block);
 }
 
-static int hpfs_writepage(struct page *page, struct writeback_control *wbc)
-{
-	return block_write_full_page(page, hpfs_get_block, wbc);
-}
-
 static void hpfs_readahead(struct readahead_control *rac)
 {
 	mpage_readahead(rac, hpfs_get_block);
@@ -248,12 +243,12 @@ const struct address_space_operations hpfs_aops = {
 	.dirty_folio	= block_dirty_folio,
 	.invalidate_folio = block_invalidate_folio,
 	.read_folio = hpfs_read_folio,
-	.writepage = hpfs_writepage,
 	.readahead = hpfs_readahead,
 	.writepages = hpfs_writepages,
 	.write_begin = hpfs_write_begin,
 	.write_end = hpfs_write_end,
-	.bmap = _hpfs_bmap
+	.bmap = _hpfs_bmap,
+	.migrate_folio = buffer_migrate_folio,
 };
 
 const struct file_operations hpfs_file_ops =
-- 
2.30.2