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diff --git a/ldiskfs/build/Makefile b/ldiskfs/build/Makefile
new file mode 100644
index 0000000..da0cda4
--- /dev/null
+++ b/ldiskfs/build/Makefile
@@ -0,0 +1,55 @@
+#
+# There are four ways this Makefile can be called:
+#
+#
+# 1.  As a subdirectory from the toplevel, for automake
+#
+# 2.  A wrapper around the kernel's makefile when building modules, to
+#     possibly override the .config file
+#
+# 3.  At configure time, as the toplevel module dir for building
+#     kernel tests
+#
+# 4.  At configure time, to determine the kernel's idea of $(ARCH)
+#
+
+ifeq ($(PATCHLEVEL),)
+
+ifeq ($(LUSTRE_LINUX_CONFIG),)
+
+# case #1
+include autoMakefile
+
+else
+
+# case #2
+# Note that this comes from make -C $LINUX -f $LUSTRE/build/Makefile
+# so "include Makefile" below includes $LINUX/Makefile, not this file
+include $(LUSTRE_LINUX_CONFIG)
+include Makefile
+
+endif # LUSTRE_LINUX_CONFIG
+
+else # PATCHLEVEL
+
+# case 3
+
+ifneq ($(LUSTRE_KERNEL_TEST),)
+extra-y = $(LUSTRE_KERNEL_TEST)
+endif
+
+obj-m := conftest.o
+
+endif # PATCHLEVEL
+
+# case 4
+
+echoarch:
+	echo $(ARCH) >$(ARCHFILE)
+
+TESTS := $(wildcard commit.*)
+check-commit:
+	SHELL="$(SHELL)" $(SHELL) test-commit-msg.sh $(TESTS)
+
+check: check-commit
+.PHONY: check-commit