raid1: Relace raise_barrier/lower_barrrier with freeze_array/unfreeze_array for recon...

We used raise_barrier to suspend nornal IO while we reconfigure the
array. Now we replace it with freeze_array.
Raise_barrier only suspends normal IO.  But freeze_array not only susend
nornal io,but it can suspend resync io. For the place where call
raise_barrier for reconfigure, it don't has a problem.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 729db21dc8298021b840fb8a7ef984abec1f5827..fd9fa6f2389adc918c76cf97ccef38b4bf374bde 100644 (file)
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2870,8 +2870,8 @@ static int stop(struct mddev *mddev)
                           atomic_read(&bitmap->behind_writes) == 0);
        }
 
-       raise_barrier(conf);
-       lower_barrier(conf);
+       freeze_array(conf, 0);
+       unfreeze_array(conf);
 
        md_unregister_thread(&mddev->thread);
        if (conf->r1bio_pool)
@@ -3030,10 +3030,10 @@ static void raid1_quiesce(struct mddev *mddev, int state)
                wake_up(&conf->wait_barrier);
                break;
        case 1:
-               raise_barrier(conf);
+               freeze_array(conf, 0);
                break;
        case 0:
-               lower_barrier(conf);
+               unfreeze_array(conf);
                break;
        }
 }