Fix congestion_wait() sync/async vs read/write confusion

Commit 1faa16d22877f4839bd433547d770c676d1d964c accidentally broke
the bdi congestion wait queue logic, causing us to wait on congestion
for WRITE (== 1) when we really wanted BLK_RW_ASYNC (== 0) instead.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ad7cd1c56b07..a35eeab2724c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1666,7 +1666,7 @@ __alloc_pages_high_priority(gfp_t gfp_mask, unsigned int order,
                         preferred_zone, migratetype);
 
                 if (!page && gfp_mask & __GFP_NOFAIL)
-                        congestion_wait(WRITE, HZ/50);
+                        congestion_wait(BLK_RW_ASYNC, HZ/50);
         } while (!page && (gfp_mask & __GFP_NOFAIL));
 
         return page;
@@ -1831,7 +1831,7 @@ rebalance:
         pages_reclaimed += did_some_progress;
         if (should_alloc_retry(gfp_mask, order, pages_reclaimed)) {
                 /* Wait for some write requests to complete then retry */
-                congestion_wait(WRITE, HZ/50);
+                congestion_wait(BLK_RW_ASYNC, HZ/50);
                 goto rebalance;
         }