Btrfs: Reduce stack usage in the resizer, fix 32 bit compiles

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index d6e5c19..9873975 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -386,6 +386,7 @@
 	int defrag_running;
 	int defrag_level;
 	char *name;
+	int in_sysfs;
 };
 
 /*