The patch titled
Subject: extfat: remove ->writepage
has been added to the -mm mm-unstable branch. Its filename is
extfat-remove-writepage.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/extfat-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@xxxxxx>
Subject: extfat: remove ->writepage
Date: Fri, 2 Dec 2022 11:26:38 +0100
Patch series "start removing writepage instances v2".
The VM doesn't need or want ->writepage for writeback and is fine with
just having ->writepages as long as ->migrate_folio is implemented.
This series removes all ->writepage instances that use
block_write_full_page directly and also have a plain mpage_writepages
based ->writepages.
This patch (of 7):
->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.
Link: https://lkml.kernel.org/r/20221202102644.770505-1-hch@xxxxxx
Link: https://lkml.kernel.org/r/20221202102644.770505-2-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Acked-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Bob Copeland <me@xxxxxxxxxxxxxxx>
Cc: Dave Kleikamp <shaggy@xxxxxxxxxx>
Cc: Jan Kara <jack@xxxxxxxx>
Cc: Mikulas Patocka <mikulas@xxxxxxxxxxxxxxxxxxxxxxxx>
Cc: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Cc: Sungjong Seo <sj1557.seo@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/exfat/inode.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
--- a/fs/exfat/inode.c~extfat-remove-writepage
+++ a/fs/exfat/inode.c
@@ -345,11 +345,6 @@ static void exfat_readahead(struct reada
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_operat
.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)
_
Patches currently in -mm which might be from hch@xxxxxx 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
