[PATCH] mm: Do not start/end writeback for pages stored in zswap

[Usama Arif <usamaarif642@gmail.com>]

start/end writeback combination incorrectly increments NR_WRITTEN
counter, eventhough the pages aren't written to disk. Pages successfully
stored in zswap should just unlock folio and return from writepage.

Signed-off-by: Usama Arif <usamaarif642@gmail.com>
---
 mm/page_io.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/mm/page_io.c b/mm/page_io.c
index a360857cf75d..501784d79977 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -196,9 +196,7 @@ int swap_writepage(struct page *page, struct writeback_control *wbc)
 		return ret;
 	}
 	if (zswap_store(folio)) {
-		folio_start_writeback(folio);
 		folio_unlock(folio);
-		folio_end_writeback(folio);
 		return 0;
 	}
 	if (!mem_cgroup_zswap_writeback_enabled(folio_memcg(folio))) {
-- 
2.43.0