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ext4: switch to using write_cache_pages() for data=journal writeout

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Instead of using generic_writepages(), let's use write_cache_pages() for
writeout of journalled data. It will allow us to stop providing
.writepage callback. Our data=journal writeback path would benefit from
a larger cleanup and refactoring but that's for a separate cleanup
series.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20221207112722.22220-10-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Jan Kara 2022-12-07 12:27:13 +01:00 committed by Theodore Ts'o
parent f30ff35f62
commit 49977f9762
1 changed files with 9 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

10
fs/ext4/inode.c
View file

@ -2712,6 +2712,12 @@ static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd)
return err;
}
static int ext4_writepage_cb(struct page *page, struct writeback_control *wbc,
void *data)
{
return ext4_writepage(page, wbc);
}
static int ext4_do_writepages(struct mpage_da_data *mpd)
{
struct writeback_control *wbc = mpd->wbc;
@ -2738,7 +2744,9 @@ static int ext4_do_writepages(struct mpage_da_data *mpd)
goto out_writepages;
if (ext4_should_journal_data(inode)) {
ret = generic_writepages(mapping, wbc);
blk_start_plug(&plug);
ret = write_cache_pages(mapping, wbc, ext4_writepage_cb, NULL);
blk_finish_plug(&plug);
goto out_writepages;
}