Btrfs: Faster deletes, add Makefile and kerncompat

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
new file mode 100644
index 0000000..9f84c08
--- /dev/null
+++ b/fs/btrfs/Makefile
@@ -0,0 +1,7 @@
+
+ctree: ctree.o
+	gcc -g -O2 -Wall -o ctree ctree.c
+
+clean:
+	rm ctree ctree.o
+