+ hfsplus-remove-writepage.patch added to mm-unstable branch

+ hfsplus-remove-writepage.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: hfsplus: remove ->writepage
has been added to the -mm mm-unstable branch.  Its filename is
     hfsplus-remove-writepage.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/hfsplus-remove-writepage.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: Christoph Hellwig <hch@lst.de>
Subject: hfsplus: remove ->writepage
Date: Fri, 2 Dec 2022 11:26:41 +0100

->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 stop
wiring up ->writepage for hfsplus_aops.

Link: https://lkml.kernel.org/r/20221202102644.770505-5-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/hfsplus/inode.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/hfsplus/inode.c~hfsplus-remove-writepage
+++ a/fs/hfsplus/inode.c
@@ -170,12 +170,12 @@ const struct address_space_operations hf
 	.dirty_folio	= block_dirty_folio,
 	.invalidate_folio = block_invalidate_folio,
 	.read_folio	= hfsplus_read_folio,
-	.writepage	= hfsplus_writepage,
 	.write_begin	= hfsplus_write_begin,
 	.write_end	= generic_write_end,
 	.bmap		= hfsplus_bmap,
 	.direct_IO	= hfsplus_direct_IO,
 	.writepages	= hfsplus_writepages,
+	.migrate_folio	= buffer_migrate_folio,
 };
 
 const struct dentry_operations hfsplus_dentry_operations = {
_

Patches currently in -mm which might be from hch@lst.de are

extfat-remove-writepage.patch
fat-remove-writepage.patch
hfs-remove-writepage.patch
hfsplus-remove-writepage.patch
hpfs-remove-writepage.patch
jfs-remove-writepage.patch
omfs-remove-writepage.patch