[Devel] [RFC PATCH vz9 v6 41/62] dm-ploop: fix access to batpages to use WRITE_ONCE

[Alexander Atanasov]

This was missed in an earlier patch and i've actually had a crash here.

https://virtuozzo.atlassian.net/browse/VSTOR-91821
Signed-off-by: Alexander Atanasov <alexander.atanasov at virtuozzo.com>
---
 drivers/md/dm-ploop-map.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm-ploop-map.c b/drivers/md/dm-ploop-map.c
index 836b7f1b9e21..6192ddca3693 100644
--- a/drivers/md/dm-ploop-map.c
+++ b/drivers/md/dm-ploop-map.c
@@ -828,7 +828,7 @@ static void ploop_advance_local_after_bat_wb(struct ploop *ploop,
 			continue;
 
 		if (success) {
-			bat_entries[i] = READ_ONCE(dst_clu[i]);
+			WRITE_ONCE(bat_entries[i], READ_ONCE(dst_clu[i]));
 			WRITE_ONCE(md->bat_levels[i], ploop_top_level(ploop));
 		} else {
 			ploop_hole_set_bit(i + off, ploop);
-- 
2.43.0