Btrfs: barrier before waitqueue_active

[linux-2.6-block.git] / fs / btrfs / delayed-inode.c

diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index 00deed4ef3edd4b54da3a3de1d14e59425458ca0..07d5eeb1e6f1df1f8ae2ddf94218b1f45298aeda 100644 (file)
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -512,8 +512,8 @@ static void __btrfs_remove_delayed_item(struct btrfs_delayed_item *delayed_item)
 
        rb_erase(&delayed_item->rb_node, root);
        delayed_item->delayed_node->count--;
-       atomic_dec(&delayed_root->items);
-       if (atomic_read(&delayed_root->items) < BTRFS_DELAYED_BACKGROUND &&
+       if (atomic_dec_return(&delayed_root->items) <
+           BTRFS_DELAYED_BACKGROUND &&
            waitqueue_active(&delayed_root->wait))
                wake_up(&delayed_root->wait);
 }
@@ -1056,8 +1056,7 @@ static void btrfs_release_delayed_inode(struct btrfs_delayed_node *delayed_node)
                delayed_node->count--;
 
                delayed_root = delayed_node->root->fs_info->delayed_root;
-               atomic_dec(&delayed_root->items);
-               if (atomic_read(&delayed_root->items) <
+               if (atomic_dec_return(&delayed_root->items) <
                    BTRFS_DELAYED_BACKGROUND &&
                    waitqueue_active(&delayed_root->wait))
                        wake_up(&delayed_root->wait);