[PATCH v2 7/9] mm: ensure that we set mapping error if writeout() fails

[Jeff Layton]

If writepage fails during a page migration, then we need to ensure that
fsync will see it by flagging the mapping.

Signed-off-by: Jeff Layton <jlay...@redhat.com>
---
 mm/migrate.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 9a0897a14d37..a9c0b46865b7 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -789,7 +789,11 @@ static int writeout(struct address_space *mapping, struct 
page *page)
                /* unlocked. Relock */
                lock_page(page);
 
-       return (rc < 0) ? -EIO : -EAGAIN;
+       if (rc < 0) {
+               mapping_set_error(mapping, rc);
+               return -EIO;
+       }
+       return -EAGAIN;
 }
 
 /*
-- 
2.9.3