Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (33 commits)
  Btrfs: Fix page count calculation
  btrfs: Drop __exit attribute on btrfs_exit_compress
  btrfs: cleanup error handling in btrfs_unlink_inode()
  Btrfs: exclude super blocks when we read in block groups
  Btrfs: make sure search_bitmap finds something in remove_from_bitmap
  btrfs: fix return value check of btrfs_start_transaction()
  btrfs: checking NULL or not in some functions
  Btrfs: avoid uninit variable warnings in ordered-data.c
  Btrfs: catch errors from btrfs_sync_log
  Btrfs: make shrink_delalloc a little friendlier
  Btrfs: handle no memory properly in prepare_pages
  Btrfs: do error checking in btrfs_del_csums
  Btrfs: use the global block reserve if we cannot reserve space
  Btrfs: do not release more reserved bytes to the global_block_rsv than we need
  Btrfs: fix check_path_shared so it returns the right value
  btrfs: check return value of btrfs_start_ioctl_transaction() properly
  btrfs: fix return value check of btrfs_join_transaction()
  fs/btrfs/inode.c: Add missing IS_ERR test
  btrfs: fix missing break in switch phrase
  btrfs: fix several uncheck memory allocations
  ...

diff --cc fs/btrfs/acl.c
Simple merge

diff --cc fs/btrfs/disk-io.c
Simple merge

diff --cc fs/btrfs/export.c
Simple merge

diff --cc fs/btrfs/extent-tree.c
Simple merge

diff --cc fs/btrfs/extent_io.c
Simple merge

diff --cc fs/btrfs/file.c
Simple merge

diff --cc fs/btrfs/inode.c
Simple merge

diff --cc fs/btrfs/super.c
Simple merge

diff --cc fs/btrfs/volumes.c
index d158530233b701397360fa13be8265274589b896,7cad59353b09c4fdf0cb80072e109bf0f9db7165..2636a051e4b2fd102a436b5f55f8ffb8a6e19f78
--- 1/fs/btrfs/volumes.c
--- 2/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@@ -1606,8 -1608,15 +1610,14 @@@ int btrfs_init_new_device(struct btrfs_
        }
  
        trans = btrfs_start_transaction(root, 0);
+       if (IS_ERR(trans)) {
+               kfree(device);
+               ret = PTR_ERR(trans);
+               goto error;
+       }
+ 
        lock_chunks(root);
  
 -      device->barriers = 1;
        device->writeable = 1;
        device->work.func = pending_bios_fn;
        generate_random_uuid(device->uuid);