mm: write_cache_pages more terminate quickly

Now that we have the early-termination logic in place, it makes sense to
bail out early in all other cases where done is set to 1.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 0d986c13d473..08d2b960b294 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -983,12 +983,15 @@ continue_unlock:
 
                         if (wbc->sync_mode == WB_SYNC_NONE) {
                                 wbc->nr_to_write--;
-                                if (wbc->nr_to_write <= 0)
+                                if (wbc->nr_to_write <= 0) {
                                         done = 1;
+                                        break;
+                                }
                         }
                         if (wbc->nonblocking && bdi_write_congested(bdi)) {
                                 wbc->encountered_congestion = 1;
                                 done = 1;
+                                break;
                         }
                 }
                 pagevec_release(&pvec);