btrfs: remove unused btrfs_device::flush_bio_sent

The status of flush bio is tracked as a status bit, changed in commit
1c3063b6dbfa ("btrfs: cleanup device states define
BTRFS_DEV_STATE_FLUSH_SENT"), the flush_bio_sent was forgotten.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index c71354f..081cb73 100644 (file)
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -82,7 +82,6 @@ struct btrfs_device {
 
        unsigned long dev_state;
        blk_status_t last_flush_error;
-       int flush_bio_sent;
 
 #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED
        seqcount_t data_seqcount;