Solo in btrfs-progs-0.19: btrfsck
diff -ru btrfs-progs-0.19.orig/btrfsck.c btrfs-progs-0.19/btrfsck.c
--- btrfs-progs-0.19.orig/btrfsck.c	2009-06-11 18:56:15.000000000 +0200
+++ btrfs-progs-0.19/btrfsck.c	2011-09-01 12:32:52.147573980 +0200
@@ -28,6 +28,7 @@
 #include "transaction.h"
 #include "list.h"
 #include "version.h"
+#include "sys/stat.h"
 
 static u64 bytes_used = 0;
 static u64 total_csum_bytes = 0;