Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / delayed-ref.h

diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h
index fe50392cdf768bf990928522a6e81f56af75d160..f75fcaf79aebd11d54ebcc6df94d6f5b67c55dfe 100644 (file)
--- a/fs/btrfs/delayed-ref.h
+++ b/fs/btrfs/delayed-ref.h
@@ -131,6 +131,15 @@ struct btrfs_delayed_ref_root {
        /* total number of head nodes ready for processing */
        unsigned long num_heads_ready;
 
+       /*
+        * bumped when someone is making progress on the delayed
+        * refs, so that other procs know they are just adding to
+        * contention intead of helping
+        */
+       atomic_t procs_running_refs;
+       atomic_t ref_seq;
+       wait_queue_head_t wait;
+
        /*
         * set when the tree is flushing before a transaction commit,
         * used by the throttling code to decide if new updates need
@@ -211,8 +220,14 @@ struct btrfs_delayed_ref_head *
 btrfs_find_delayed_ref_head(struct btrfs_trans_handle *trans, u64 bytenr);
 int btrfs_delayed_ref_lock(struct btrfs_trans_handle *trans,
                           struct btrfs_delayed_ref_head *head);
+static inline void btrfs_delayed_ref_unlock(struct btrfs_delayed_ref_head *head)
+{
+       mutex_unlock(&head->mutex);
+}
+
 int btrfs_find_ref_cluster(struct btrfs_trans_handle *trans,
                           struct list_head *cluster, u64 search_start);
+void btrfs_release_ref_cluster(struct list_head *cluster);
 
 int btrfs_check_delayed_seq(struct btrfs_fs_info *fs_info,
                            struct btrfs_delayed_ref_root *delayed_refs,