Btrfs: Add version strings on module load

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/Makefile b/fs/btrfs/Makefile
index 0e2dcc7..f8a38b0 100644
--- a/fs/btrfs/Makefile
+++ b/fs/btrfs/Makefile
@@ -14,8 +14,12 @@
 # Normal Makefile
 
 KERNELDIR := /lib/modules/`uname -r`/build
-all:
+all: version
 	$(MAKE) -C $(KERNELDIR) M=`pwd` modules
+
+version:
+	bash version.sh
+
 modules_install:
 	$(MAKE) -C $(KERNELDIR) M=`pwd` modules_install
 clean: