Makefile: Enable kselftest modules in .config
Add LINUX_MODULES variable that contains a list of Kconfig options that
are to be enabled on top of defconfig.
This is needed to enable kernel modules used by kselftest. Normally this
would be done by running `make kselftest-merge` but that enables too
many options that we don't need, including many debugging features of
the kernel which make the tests timeout. Instead we will only enable the
modules/features that our selected tests need.
Bug: 193407077
Test: make linux_modules
Change-Id: Ia1a43ebb35e0710ee83e9605a2c8d324f0eb77d1
diff --git a/Makefile b/Makefile
index 6a65868..dbab5af 100644
--- a/Makefile
+++ b/Makefile
@@ -201,6 +201,7 @@
LINUX_VMLINUX = $(LINUX_OUT)/vmlinux
LINUX_CONFIG := $(LINUX_OUT)/.config
LINUX_DIST_FILES = $(LINUX_CONFIG) $(LINUX_VMLINUX) $(KERNEL_IMAGE)
+LINUX_LSMOD_TXT := $(LINUX_OUT)/lsmod.txt
LINUX_TOOLCHAIN ?= $(TOOLCHAIN)
$(eval $(call define_toolchain,$(LINUX_TOOLCHAIN),LINUX_))
@@ -223,9 +224,16 @@
V=$(LINUX_VERBOSE) \
O=$(LINUX_OUT)
+LINUX_MODULES := \
+ TEST_PRINTF
+
.PHONY: linux_defconfig
linux_defconfig $(LINUX_CONFIG):
+ $(LINUX_MAKE) $(LINUX_DEFCONFIG)
+ # Disable all modules, then selectively enable those in LINUX_MODULES.
+ @ echo > $(LINUX_LSMOD_TXT)
+ + $(LINUX_MAKE) LSMOD=$(LINUX_LSMOD_TXT) localmodconfig
+ $(LINUX_SRC)/scripts/config --file $(LINUX_CONFIG) $(addprefix -m CONFIG_,$(LINUX_MODULES))
.PHONY: linux_menuconfig
linux_menuconfig: $(LINUX_CONFIG)
