Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (42 commits)
  Btrfs: hash the btree inode during  fill_super
  Btrfs: relocate file extents in clusters
  Btrfs: don't rename file into dummy directory
  Btrfs: check size of inode backref before adding hardlink
  Btrfs: fix releasepage to avoid unlocking extents we haven't locked
  Btrfs: Fix test_range_bit for whole file extents
  Btrfs: fix errors handling cached state in set/clear_extent_bit
  Btrfs: fix early enospc during balancing
  Btrfs: deal with NULL space info
  Btrfs: account for space used by the super mirrors
  Btrfs: fix extent entry threshold calculation
  Btrfs: remove dead code
  Btrfs: fix bitmap size tracking
  Btrfs: don't keep retrying a block group if we fail to allocate a cluster
  Btrfs: make balance code choose more wisely when relocating
  Btrfs: fix arithmetic error in clone ioctl
  Btrfs: add snapshot/subvolume destroy ioctl
  Btrfs: change how subvolumes are organized
  Btrfs: do not reuse objectid of deleted snapshot/subvol
  Btrfs: speed up snapshot dropping
  ...

1 files changed, 12 insertions, 0 deletions

diff --git a/fs/btrfs/async-thread.h b/fs/btrfs/async-thread.h
index 1b511c109db6..fc089b95ec14 100644
--- a/fs/btrfs/async-thread.h
+++ b/fs/btrfs/async-thread.h
@@ -73,6 +73,15 @@ struct btrfs_workers {
 	/* force completions in the order they were queued */
 	int ordered;
 
+	/* more workers required, but in an interrupt handler */
+	int atomic_start_pending;
+
+	/*
+	 * are we allowed to sleep while starting workers or are we required
+	 * to start them at a later time?
+	 */
+	int atomic_worker_start;
+
 	/* list with all the work threads.  The workers on the idle thread
 	 * may be actively servicing jobs, but they haven't yet hit the
 	 * idle thresh limit above.
@@ -90,6 +99,9 @@ struct btrfs_workers {
 	/* lock for finding the next worker thread to queue on */
 	spinlock_t lock;
 
+	/* lock for the ordered lists */
+	spinlock_t order_lock;
+
 	/* extra name for this worker, used for current->name */
 	char *name;
 };