-# target-dir => where to store outputfile
-# build-dir => directory in kernel source tree to use
-
-build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@
-build-dir = $(patsubst %/,%,$(dir $(build-target)))
-
-%.i: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.ll: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.lst: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.o: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.s: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.symtypes: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
+# make foo/bar/baz.s
+#
+# The supported suffixes for single-target are listed in 'single-targets'
+#
+# To build only under specific subdirectories, you can do like this:
+#
+# make foo/bar/baz/
+
+ifdef single-build
+
+single-all := $(filter $(single-targets), $(MAKECMDGOALS))
+
+# .ko is special because modpost is needed
+single-ko := $(sort $(filter %.ko, $(single-all)))
+single-no-ko := $(sort $(patsubst %.ko,%.mod, $(single-all)))
+
+$(single-ko): single_modpost
+ @:
+$(single-no-ko): descend
+ @:
+