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writeback: remove a use of write_cache_pages() from do_writepages() 

Use the new writeback_iter() directly instead of indirecting through a
callback.

[hch@lst.de: ported to the while based iter style]
Link: https://lkml.kernel.org/r/20240215063649.2164017-15-hch@lst.de
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-02-15 07:36:49 +01:00 committed by Andrew Morton
parent cdc150b575
commit c44ed5b759
1 changed files with 18 additions and 13 deletions
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31
mm/page-writeback.c
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@ -2577,15 +2577,25 @@ int write_cache_pages(struct address_space *mapping,
}
EXPORT_SYMBOL(write_cache_pages);
static int writepage_cb(struct folio *folio, struct writeback_control *wbc,
void *data)
static int writeback_use_writepage(struct address_space *mapping,
struct writeback_control *wbc)
{
struct address_space *mapping = data;
int ret = mapping->a_ops->writepage(&folio->page, wbc);
struct folio *folio = NULL;
struct blk_plug plug;
int err;
if (ret < 0)
mapping_set_error(mapping, ret);
return ret;
blk_start_plug(&plug);
while ((folio = writeback_iter(mapping, wbc, folio, &err))) {
err = mapping->a_ops->writepage(&folio->page, wbc);
if (err == AOP_WRITEPAGE_ACTIVATE) {
folio_unlock(folio);
err = 0;
}
mapping_set_error(mapping, err);
}
blk_finish_plug(&plug);
return err;
}
int do_writepages(struct address_space *mapping, struct writeback_control *wbc)
@ -2601,12 +2611,7 @@ int do_writepages(struct address_space *mapping, struct writeback_control *wbc)
if (mapping->a_ops->writepages) {
ret = mapping->a_ops->writepages(mapping, wbc);
} else if (mapping->a_ops->writepage) {
struct blk_plug plug;
blk_start_plug(&plug);
ret = write_cache_pages(mapping, wbc, writepage_cb,
mapping);
blk_finish_plug(&plug);
ret = writeback_use_writepage(mapping, wbc);
} else {
/* deal with chardevs and other special files */
ret = 0;