Merge "techpack: add tech package support"

Makefile

@@ -585,7 +585,7 @@ export KBUILD_MODULES KBUILD_BUILTIN
 ifeq ($(KBUILD_EXTMOD),)
 # Objects we will link into vmlinux / subdirs we need to visit
 init-y		:= init/
-drivers-y	:= drivers/ sound/ firmware/
+drivers-y	:= drivers/ sound/ firmware/ techpack/
 net-y		:= net/
 libs-y		:= lib/
 core-y		:= usr/
@@ -1238,6 +1238,7 @@ headers_install: __headers
 	  $(error Headers not exportable for the $(SRCARCH) architecture))
 	$(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
 	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst)
+	$(Q)$(MAKE) $(hdr-inst)=techpack
 
 PHONY += headers_check_all
 headers_check_all: headers_install_all
@@ -1247,6 +1248,7 @@ PHONY += headers_check
 headers_check: headers_install
 	$(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
 	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
+	$(Q)$(MAKE) $(hdr-inst)=techpack HDRCHECK=1
 
 # ---------------------------------------------------------------------------
 # Kernel selftest

techpack/.gitignore

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# ignore all subdirs except stub
+!/stub/

techpack/Kbuild

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+techpack-dirs := $(shell find $(srctree)/$(src) -maxdepth 1 -mindepth 1 -type d -not -name ".*")
+obj-y += stub/ $(addsuffix /,$(subst $(srctree)/$(src)/,,$(techpack-dirs)))
+
+techpack-header-dirs := $(shell find $(srctree)/techpack -maxdepth 1 -mindepth 1 -type d -not -name ".*")
+header-y += $(addsuffix /include/uapi/,$(subst $(srctree)/techpack/,,$(techpack-header-dirs)))

techpack/stub/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+ccflags-y := -Wno-unused-function
+obj-y := stub.o

techpack/stub/include/uapi/Kbuild

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note
+#Stub place holder

techpack/stub/stub.c

@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+static void _techpack_stub(void)
+{
+}