From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Instead of keeping our own local iterator variable, use the one just
added to folio_batch.
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
mm/page-writeback.c | 19 +++++++++----------
1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index c7983ea3040be4..70f42fd9a95b5d 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2397,13 +2397,19 @@ static pgoff_t wbc_end(struct writeback_control *wbc)
return wbc->range_end >> PAGE_SHIFT;
}
-static void writeback_get_batch(struct address_space *mapping,
+static struct folio *writeback_get_next(struct address_space *mapping,
struct writeback_control *wbc)
{
+ struct folio *folio = folio_batch_next(&wbc->fbatch);
+
+ if (folio)
+ return folio;
+
folio_batch_release(&wbc->fbatch);
cond_resched();
filemap_get_folios_tag(mapping, &wbc->index, wbc_end(wbc),
wbc_to_tag(wbc), &wbc->fbatch);
+ return folio_batch_next(&wbc->fbatch);
}
static bool should_writeback_folio(struct address_space *mapping,
@@ -2473,7 +2479,6 @@ int write_cache_pages(struct address_space *mapping,
{
int error;
pgoff_t end; /* Inclusive */
- int i = 0;
if (wbc->range_cyclic) {
wbc->index = mapping->writeback_index; /* prev offset */
@@ -2489,18 +2494,12 @@ int write_cache_pages(struct address_space *mapping,
wbc->err = 0;
for (;;) {
- struct folio *folio;
+ struct folio *folio = writeback_get_next(mapping, wbc);
unsigned long nr;
- if (i == wbc->fbatch.nr) {
- writeback_get_batch(mapping, wbc);
- i = 0;
- }
- if (wbc->fbatch.nr == 0)
+ if (!folio)
break;
- folio = wbc->fbatch.folios[i++];
-
folio_lock(folio);
if (!should_writeback_folio(mapping, wbc, folio)) {
folio_unlock(folio);
--
2.39.2
