Btrfs: Remove unnecessary finish_wait() in wait_current_trans()

We only need to call finish_wait() after wait loop.

By the way, this patch makes code of waiting loop similar to
example in wait.h(no functional change)

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 2d654c1..4305428 100644 (file)
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -147,18 +147,13 @@ static void wait_current_trans(struct btrfs_root *root)
                while (1) {
                        prepare_to_wait(&root->fs_info->transaction_wait, &wait,
                                        TASK_UNINTERRUPTIBLE);
-                       if (cur_trans->blocked) {
-                               mutex_unlock(&root->fs_info->trans_mutex);
-                               schedule();
-                               mutex_lock(&root->fs_info->trans_mutex);
-                               finish_wait(&root->fs_info->transaction_wait,
-                                           &wait);
-                       } else {
-                               finish_wait(&root->fs_info->transaction_wait,
-                                           &wait);
+                       if (!cur_trans->blocked)
                                break;
-                       }
+                       mutex_unlock(&root->fs_info->trans_mutex);
+                       schedule();
+                       mutex_lock(&root->fs_info->trans_mutex);
                }
+               finish_wait(&root->fs_info->transaction_wait, &wait);
                put_transaction(cur_trans);
        }
 }