From: Ben Hutchings <ben@decadent.org.uk>
Subject: kbuild: Fix recordmcount dependency for OOT modules
Date: Mon, 08 Sep 2014 18:31:24 +0100

We never rebuild anything in-tree when building an out-of-tree
modules, so external modules should not depend on the recordmcount
sources.

--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -240,6 +240,11 @@ cmd_record_mcount = 						\
 	fi;
 endif
 
+# Don't require recordmcount source for an OOT build.
+ifdef KBUILD_EXTMOD
+recordmcount_source :=
+endif
+
 define rule_cc_o_c
 	$(call echo-cmd,checksrc) $(cmd_checksrc)			  \
 	$(call echo-cmd,cc_o_c) $(cmd_cc_o_c);				  \
