Rework btrfs_drop_inode to avoid scheduling

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index a2c2d6d..1e19f2d 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -349,6 +349,7 @@
 
 	u64 total_pinned;
 	spinlock_t delalloc_lock;
+	spinlock_t new_trans_lock;
 	u64 delalloc_bytes;
 };
 /*