[PATCH 1/2] block: handle huge zero folios in bio_free_folios

[Christoph Hellwig <hch@lst.de>]

When CONFIG_PERSISTENT_HUGE_ZERO_FOLIO is enabled, iomap_dio_zero() can
add a huge zero folio to a zeroing bio, which needs special treatment
in bio_free_folios by also checking is_huge_zero_folio() in addition to
is_zero_folio().

Fixes: 8dd5e7c75d7b ("block: add helpers to bounce buffer an iov_iter into bios")
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 block/bio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/bio.c b/block/bio.c
index f2a5f4d0a967..4d6e5f5f5710 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1302,7 +1302,7 @@ static void bio_free_folios(struct bio *bio)
 	bio_for_each_bvec_all(bv, bio, i) {
 		struct folio *folio = bvec_folio(bv);
 
-		if (!is_zero_folio(folio))
+		if (!is_zero_folio(folio) && !is_huge_zero_folio(folio))
 			folio_put(folio);
 	}
 }
-- 
2.53.0