Merge tag 'kbuild-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

- remove headers_{install,check}_all targets

- remove unreasonable 'depends on !UML' from CONFIG_SAMPLES

- re-implement 'make headers_install' more cleanly

- add new header-test-y syntax to compile-test headers

- compile-test exported headers to ensure they are compilable in
user-space

- compile-test headers under include/ to ensure they are self-contained

- remove -Waggregate-return, -Wno-uninitialized, -Wno-unused-value
flags

- add -Werror=unknown-warning-option for Clang

- add 128-bit built-in types support to genksyms

- fix missed rebuild of modules.builtin

- propagate 'No space left on device' error in fixdep to Make

- allow Clang to use its integrated assembler

- improve some coccinelle scripts

- add a new flag KBUILD_ABS_SRCTREE to request Kbuild to use absolute
path for $(srctree).

- do not ignore errors when compression utility is missing

- misc cleanups

* tag 'kbuild-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (49 commits)
kbuild: use -- separater intead of $(filter-out ...) for cc-cross-prefix
kbuild: Inform user to pass ARCH= for make mrproper
kbuild: fix compression errors getting ignored
kbuild: add a flag to force absolute path for srctree
kbuild: replace KBUILD_SRCTREE with boolean building_out_of_srctree
kbuild: remove src and obj from the top Makefile
scripts/tags.sh: remove unused environment variables from comments
scripts/tags.sh: drop SUBARCH support for ARM
kbuild: compile-test kernel headers to ensure they are self-contained
kheaders: include only headers into kheaders_data.tar.xz
kheaders: remove meaningless -R option of 'ls'
kbuild: support header-test-pattern-y
kbuild: do not create wrappers for header-test-y
kbuild: compile-test exported headers to ensure they are self-contained
init/Kconfig: add CONFIG_CC_CAN_LINK
kallsyms: exclude kasan local symbols on s390
kbuild: add more hints about SUBDIRS replacement
coccinelle: api/stream_open: treat all wait_.*() calls as blocking
coccinelle: put_device: Add a cast to an expression for an assignment
coccinelle: put_device: Adjust a message construction
...

Documentation/kbuild/headers_install.rst

···
 An 'include' directory is automatically created inside INSTALL_HDR_PATH and
 headers are installed in 'INSTALL_HDR_PATH/include'.
 
-The command "make headers_install_all" exports headers for all architectures
-simultaneously.  (This is mostly of interest to distribution maintainers,
-who create an architecture-independent tarball from the resulting include
-directory.)  You also can use HDR_ARCH_LIST to specify list of architectures.
-Remember to provide the appropriate linux/asm directory via "mv" or "ln -s"
-before building a C library with headers exported this way.
-
 The kernel header export infrastructure is maintained by David Woodhouse
 <[e-mail]>.

Documentation/kbuild/kbuild.rst

···
 
 The value can be overridden in which case the default value is ignored.
 
+KBUILD_ABS_SRCTREE
+--------------------------------------------------
+Kbuild uses a relative path to point to the tree when possible. For instance,
+when building in the source tree, the source tree path is '.'
+
+Setting this flag requests Kbuild to use absolute path to the source tree.
+There are some useful cases to do so, like when generating tag files with
+absolute path entries etc.
+
 KBUILD_SIGN_PIN
 ---------------
 This variable allows a passphrase or PIN to be passed to the sign-file

Documentation/kbuild/makefiles.rst

···
 ------------------------------------
 
 	The archheaders: rule is used to generate header files that
-	may be installed into user space by "make header_install" or
-	"make headers_install_all".  In order to support
-	"make headers_install_all", this target has to be able to run
-	on an unconfigured tree, or a tree configured for another
-	architecture.
+	may be installed into user space by "make header_install".
 
 	It is run before "make archprepare" when run on the
 	architecture itself.
···
 	In this example, extra-y is used to list object files that
 	shall be built, but shall not be linked as part of built-in.a.
 
+    header-test-y
+
+	header-test-y specifies headers (*.h) in the current directory that
+	should be compile tested to ensure they are self-contained,
+	i.e. compilable as standalone units. If CONFIG_HEADER_TEST is enabled,
+	this builds them as part of extra-y.
+
+    header-test-pattern-y
+
+	This works as a weaker version of header-test-y, and accepts wildcard
+	patterns. The typical usage is:
+
+		  header-test-pattern-y += *.h
+
+	This specifies all the files that matches to '*.h' in the current
+	directory, but the files in 'header-test-' are excluded.
 
 6.7 Commands useful for building a boot image
 ---------------------------------------------

Makefile

···
 ifdef SUBDIRS
   $(warning ================= WARNING ================)
   $(warning 'SUBDIRS' will be removed after Linux 5.3)
+  $(warning )
+  $(warning If you are building an individual subdirectory)
+  $(warning in the kernel tree, you can do like this:)
+  $(warning $$ make path/to/dir/you/want/to/build/)
+  $(warning (Do not forget the trailing slash))
+  $(warning )
+  $(warning If you are building an external module,)
   $(warning Please use 'M=' or 'KBUILD_EXTMOD' instead)
   $(warning ==========================================)
   KBUILD_EXTMOD ?= $(SUBDIRS)
···
   KBUILD_EXTMOD := $(M)
 endif
 
+export KBUILD_CHECKSRC KBUILD_EXTMOD
+
 ifeq ($(abs_srctree),$(abs_objtree))
         # building in the source tree
         srctree := .
+	building_out_of_srctree :=
 else
         ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
                 # building in a subdirectory of the source tree
···
         else
                 srctree := $(abs_srctree)
         endif
-
-	# TODO:
-	# KBUILD_SRC is only used to distinguish in-tree/out-of-tree build.
-	# Replace it with $(srctree) or something.
-	KBUILD_SRC := $(abs_srctree)
+	building_out_of_srctree := 1
 endif
 
-export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
+ifneq ($(KBUILD_ABS_SRCTREE),)
+srctree := $(abs_srctree)
+endif
 
 objtree		:= .
-src		:= $(srctree)
-obj		:= $(objtree)
-
 VPATH		:= $(srctree)
 
-export srctree objtree VPATH
+export building_out_of_srctree srctree objtree VPATH
 
 # To make sure we do not include .config for any of the *config targets
 # catch them early, and hand them over to scripts/kconfig/Makefile
···
 clean-targets := %clean mrproper cleandocs
 no-dot-config-targets := $(clean-targets) \
 			 cscope gtags TAGS tags help% %docs check% coccicheck \
-			 $(version_h) headers_% archheaders archscripts \
+			 $(version_h) headers headers_% archheaders archscripts \
 			 %asm-generic kernelversion %src-pkg
 no-sync-config-targets := $(no-dot-config-targets) install %install \
 			   kernelrelease
···
 LINUXINCLUDE    := \
 		-I$(srctree)/arch/$(SRCARCH)/include \
 		-I$(objtree)/arch/$(SRCARCH)/include/generated \
-		$(if $(filter .,$(srctree)),,-I$(srctree)/include) \
+		$(if $(building_out_of_srctree),-I$(srctree)/include) \
 		-I$(objtree)/include \
 		$(USERINCLUDE)
 
···
 # At the same time when output Makefile generated, generate .gitignore to
 # ignore whole output directory
 outputmakefile:
-ifneq ($(srctree),.)
+ifdef building_out_of_srctree
 	$(Q)ln -fsn $(srctree) source
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
 	$(Q)test -e .gitignore || \
···
 ifneq ($(GCC_TOOLCHAIN),)
 CLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
 endif
+ifeq ($(shell $(AS) --version 2>&1 | head -n 1 | grep clang),)
 CLANG_FLAGS	+= -no-integrated-as
+endif
+CLANG_FLAGS	+= -Werror=unknown-warning-option
 KBUILD_CFLAGS	+= $(CLANG_FLAGS)
 KBUILD_AFLAGS	+= $(CLANG_FLAGS)
 export CLANG_FLAGS
···
 init-y		:= init/
 drivers-y	:= drivers/ sound/
 drivers-$(CONFIG_SAMPLES) += samples/
+drivers-$(CONFIG_KERNEL_HEADER_TEST) += include/
 net-y		:= net/
 libs-y		:= lib/
 core-y		:= usr/
···
 
 targets := vmlinux
 
-# Some samples need headers_install.
-samples: headers_install
-
 # The actual objects are generated when descending,
 # make sure no implicit rule kicks in
 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
···
 # and if so do:
 # 1) Check that make has not been executed in the kernel src $(srctree)
 prepare3: include/config/kernel.release
-ifneq ($(srctree),.)
+ifdef building_out_of_srctree
 	@$(kecho) '  Using $(srctree) as source for kernel'
 	$(Q)if [ -f $(srctree)/.config -o \
 		 -d $(srctree)/include/config -o \
 		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
-		echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
+		echo >&2 "  $(srctree) is not clean, please run 'make ARCH=$(ARCH) mrproper'"; \
 		echo >&2 "  in the '$(srctree)' directory.";\
 		/bin/false; \
 	fi;
···
 #Default location for installed headers
 export INSTALL_HDR_PATH = $(objtree)/usr
 
-# If we do an all arch process set dst to include/arch-$(SRCARCH)
-hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include)
+quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
+      cmd_headers_install = \
+	mkdir -p $(INSTALL_HDR_PATH); \
+	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
+	usr/include $(INSTALL_HDR_PATH)
+
+PHONY += headers_install
+headers_install: headers
+	$(call cmd,headers_install)
 
 PHONY += archheaders archscripts
 
-PHONY += __headers
-__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
-	$(Q)$(MAKE) $(build)=scripts build_unifdef
+hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
 
-PHONY += headers_install_all
-headers_install_all:
-	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
-
-PHONY += headers_install
-headers_install: __headers
+PHONY += headers
+headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
 	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
 	  $(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)
-
-PHONY += headers_check_all
-headers_check_all: headers_install_all
-	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
+	$(Q)$(MAKE) $(hdr-inst)=include/uapi
+	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
 
 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
+headers_check: headers
+	$(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
+	$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi HDRCHECK=1
+
+ifdef CONFIG_HEADERS_INSTALL
+prepare: headers
+endif
 
 ifdef CONFIG_HEADERS_CHECK
 all: headers_check
 endif
+
+PHONY += scripts_unifdef
+scripts_unifdef: scripts_basic
+	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
 
 # ---------------------------------------------------------------------------
 # Kernel selftest
···
 # using awk while concatenating to the final file.
 
 PHONY += modules
-modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
-	$(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
+modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin
 	@$(kecho) '  Building modules, stage 2.';
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
 
-modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
-	$(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
+modules.order: $(vmlinux-dirs)
+	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@
 
-%/modules.builtin: include/config/auto.conf include/config/tristate.conf
-	$(Q)$(MAKE) $(modbuiltin)=$*
+modbuiltin-dirs := $(addprefix _modbuiltin_, $(vmlinux-dirs))
 
+modules.builtin: $(modbuiltin-dirs)
+	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@
+
+PHONY += $(modbuiltin-dirs)
+# tristate.conf is not included from this Makefile. Add it as a prerequisite
+# here to make it self-healing in case somebody accidentally removes it.
+$(modbuiltin-dirs): include/config/tristate.conf
+	$(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@)
 
 # Target to prepare building external modules
 PHONY += modules_prepare
···
 CLEAN_FILES += modules.builtin.modinfo
 
 # Directories & files removed with 'make mrproper'
-MRPROPER_DIRS  += include/config usr/include include/generated          \
+MRPROPER_DIRS  += include/config include/generated          \
 		  arch/$(SRCARCH)/include/generated .tmp_objdiff
 MRPROPER_FILES += .config .config.old .version \
 		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
···
 # ---------------------------------------------------------------------------
 
 PHONY += scripts_gdb
-scripts_gdb: prepare
+scripts_gdb: prepare0
 	$(Q)$(MAKE) $(build)=scripts/gdb
 	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
 
···
 endif
 checkstack:
 	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
-	$(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
+	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
 
 kernelrelease:
 	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
···
 
 tools/: FORCE
 	$(Q)mkdir -p $(objtree)/tools
-	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
+	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
 
 tools/%: FORCE
 	$(Q)mkdir -p $(objtree)/tools
-	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
+	$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
 
 # Single targets
 # ---------------------------------------------------------------------------
···
 PHONY += /
 /: ./
 
-# Make sure the latest headers are built for Documentation
-Documentation/ samples/: headers_install
 %/: prepare FORCE
 	$(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir)
 

arch/arc/Makefile

···
 # any kernel headers, and missing the r25 global register
 # Can't do unconditionally because of recursive include issues
 # due to <linux/thread_info.h>
-LINUXINCLUDE	+=  -include ${src}/arch/arc/include/asm/current.h
+LINUXINCLUDE	+=  -include $(srctree)/arch/arc/include/asm/current.h
 endif
 
 cflags-y				+= -fsection-anchors

arch/arc/configs/tb10x_defconfig

···
 CONFIG_DEBUG_INFO=y
 CONFIG_STRIP_ASM_SYMS=y
 CONFIG_DEBUG_FS=y
+CONFIG_HEADERS_INSTALL=y
 CONFIG_HEADERS_CHECK=y
 CONFIG_DEBUG_SECTION_MISMATCH=y
 CONFIG_MAGIC_SYSRQ=y

arch/nds32/configs/defconfig

···
 CONFIG_DEBUG_INFO_DWARF4=y
 CONFIG_GDB_SCRIPTS=y
 CONFIG_READABLE_ASM=y
+CONFIG_HEADERS_INSTALL=y
 CONFIG_HEADERS_CHECK=y
 CONFIG_DEBUG_SECTION_MISMATCH=y
 CONFIG_MAGIC_SYSRQ=y

arch/parisc/Makefile

···
 	elif [ -x /sbin/palo ]; then echo /sbin/palo; \
 	fi)
 
-PALOCONF := $(shell if [ -f $(src)/palo.conf ]; then echo $(src)/palo.conf; \
-	else echo $(obj)/palo.conf; \
+PALOCONF := $(shell if [ -f $(srctree)/palo.conf ]; then echo $(srctree)/palo.conf; \
+	else echo $(objtree)/palo.conf; \
 	fi)
 
 palo lifimage: vmlinuz
···
 		false; \
 	fi
 	@if test ! -f "$(PALOCONF)"; then \
-		cp $(src)/arch/parisc/defpalo.conf $(obj)/palo.conf; \
-		echo 'A generic palo config file ($(obj)/palo.conf) has been created for you.'; \
+		cp $(srctree)/arch/parisc/defpalo.conf $(objtree)/palo.conf; \
+		echo 'A generic palo config file ($(objree)/palo.conf) has been created for you.'; \
 		echo 'You should check it and re-run "make palo".'; \
 		echo 'WARNING: the "lifimage" file is now placed in this directory by default!'; \
 		false; \
···
 endif
 
 install:
-	$(CONFIG_SHELL) $(src)/arch/parisc/install.sh \
+	$(CONFIG_SHELL) $(srctree)/arch/parisc/install.sh \
 			$(KERNELRELEASE) vmlinux System.map "$(INSTALL_PATH)"
 zinstall:
-	$(CONFIG_SHELL) $(src)/arch/parisc/install.sh \
+	$(CONFIG_SHELL) $(srctree)/arch/parisc/install.sh \
 			$(KERNELRELEASE) vmlinuz System.map "$(INSTALL_PATH)"
 
 CLEAN_FILES	+= lifimage

arch/parisc/configs/a500_defconfig

···
 CONFIG_NLS_ISO8859_15=m
 CONFIG_NLS_UTF8=m
 CONFIG_DEBUG_FS=y
+CONFIG_HEADERS_INSTALL=y
 CONFIG_HEADERS_CHECK=y
 CONFIG_MAGIC_SYSRQ=y
 # CONFIG_DEBUG_BUGVERBOSE is not set

arch/parisc/configs/b180_defconfig

···
 CONFIG_NLS_ISO8859_1=m
 CONFIG_NLS_ISO8859_15=m
 CONFIG_NLS_UTF8=m
+CONFIG_HEADERS_INSTALL=y
 CONFIG_HEADERS_CHECK=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_KERNEL=y

arch/parisc/configs/c3000_defconfig

···
 CONFIG_NLS_ISO8859_15=m
 CONFIG_NLS_UTF8=m
 CONFIG_DEBUG_FS=y
+CONFIG_HEADERS_INSTALL=y
 CONFIG_HEADERS_CHECK=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_MUTEXES=y

arch/parisc/configs/default_defconfig

···
 CONFIG_NLS_KOI8_U=m
 CONFIG_NLS_UTF8=y
 CONFIG_DEBUG_FS=y
+CONFIG_HEADERS_INSTALL=y
 CONFIG_HEADERS_CHECK=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_KERNEL=y

arch/powerpc/configs/ppc6xx_defconfig

···
 CONFIG_NLS_KOI8_U=m
 CONFIG_DEBUG_INFO=y
 CONFIG_UNUSED_SYMBOLS=y
+CONFIG_HEADERS_INSTALL=y
 CONFIG_HEADERS_CHECK=y
 CONFIG_MAGIC_SYSRQ=y
 CONFIG_DEBUG_KERNEL=y

arch/s390/configs/debug_defconfig

···
 CONFIG_FRAME_WARN=1024
 CONFIG_READABLE_ASM=y
 CONFIG_UNUSED_SYMBOLS=y
+CONFIG_HEADERS_INSTALL=y
 CONFIG_HEADERS_CHECK=y
 CONFIG_DEBUG_SECTION_MISMATCH=y
 CONFIG_MAGIC_SYSRQ=y

arch/um/Makefile

···
 USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
 		$(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \
 		-D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \
-		-idirafter $(obj)/include -D__KERNEL__ -D__UM_HOST__
+		-idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
 
 #This will adjust *FLAGS accordingly to the platform.
 include $(ARCH_DIR)/Makefile-os-$(OS)

drivers/gpu/drm/i915/.gitignore

···
-header_test_*.c

drivers/gpu/drm/i915/Makefile.header-test

···
 # Copyright © 2019 Intel Corporation
 
 # Test the headers are compilable as standalone units
-header_test := \
+header-test-$(CONFIG_DRM_I915_WERROR) := \
 	i915_active_types.h \
 	i915_gem_context_types.h \
 	i915_priolist_types.h \
···
 	intel_sprite.h \
 	intel_tv.h \
 	intel_workarounds_types.h
-
-quiet_cmd_header_test = HDRTEST $@
-      cmd_header_test = echo "\#include \"$(<F)\"" > $@
-
-header_test_%.c: %.h
-	$(call cmd,header_test)
-
-i915-$(CONFIG_DRM_I915_WERROR) += $(foreach h,$(header_test),$(patsubst %.h,header_test_%.o,$(h)))
-
-clean-files += $(foreach h,$(header_test),$(patsubst %.h,header_test_%.c,$(h)))

include/Kbuild

···
+# SPDX-License-Identifier: GPL-2.0-only
+
+# Add header-test-$(CONFIG_...) guard to headers that are only compiled
+# for particular architectures.
+#
+# Headers listed in header-test- are excluded from the test coverage.
+# Many headers are excluded for now because they fail to build. Please
+# consider to fix headers first before adding new ones to the blacklist.
+#
+# Sorted alphabetically.
+header-test-			+= acpi/acbuffer.h
+header-test-			+= acpi/acpi.h
+header-test-			+= acpi/acpi_bus.h
+header-test-			+= acpi/acpi_drivers.h
+header-test-			+= acpi/acpi_io.h
+header-test-			+= acpi/acpi_lpat.h
+header-test-			+= acpi/acpiosxf.h
+header-test-			+= acpi/acpixf.h
+header-test-			+= acpi/acrestyp.h
+header-test-			+= acpi/actbl.h
+header-test-			+= acpi/actbl1.h
+header-test-			+= acpi/actbl2.h
+header-test-			+= acpi/actbl3.h
+header-test-			+= acpi/actypes.h
+header-test-			+= acpi/battery.h
+header-test-			+= acpi/cppc_acpi.h
+header-test-			+= acpi/nfit.h
+header-test-			+= acpi/platform/acenv.h
+header-test-			+= acpi/platform/acenvex.h
+header-test-			+= acpi/platform/acintel.h
+header-test-			+= acpi/platform/aclinux.h
+header-test-			+= acpi/platform/aclinuxex.h
+header-test-			+= acpi/processor.h
+header-test-			+= clocksource/hyperv_timer.h
+header-test-			+= clocksource/timer-sp804.h
+header-test-			+= crypto/cast_common.h
+header-test-			+= crypto/internal/cryptouser.h
+header-test-			+= crypto/pkcs7.h
+header-test-			+= crypto/poly1305.h
+header-test-			+= crypto/sha3.h
+header-test-			+= drm/ati_pcigart.h
+header-test-			+= drm/bridge/dw_hdmi.h
+header-test-			+= drm/bridge/dw_mipi_dsi.h
+header-test-			+= drm/drm_audio_component.h
+header-test-			+= drm/drm_auth.h
+header-test-			+= drm/drm_debugfs.h
+header-test-			+= drm/drm_debugfs_crc.h
+header-test-			+= drm/drm_displayid.h
+header-test-			+= drm/drm_encoder_slave.h
+header-test-			+= drm/drm_fb_cma_helper.h
+header-test-			+= drm/drm_fb_helper.h
+header-test-			+= drm/drm_fixed.h
+header-test-			+= drm/drm_format_helper.h
+header-test-			+= drm/drm_lease.h
+header-test-			+= drm/drm_legacy.h
+header-test-			+= drm/drm_panel.h
+header-test-			+= drm/drm_plane_helper.h
+header-test-			+= drm/drm_rect.h
+header-test-			+= drm/i915_component.h
+header-test-			+= drm/intel-gtt.h
+header-test-			+= drm/tinydrm/tinydrm-helpers.h
+header-test-			+= drm/ttm/ttm_debug.h
+header-test-			+= keys/asymmetric-parser.h
+header-test-			+= keys/asymmetric-subtype.h
+header-test-			+= keys/asymmetric-type.h
+header-test-			+= keys/big_key-type.h
+header-test-			+= keys/request_key_auth-type.h
+header-test-			+= keys/trusted.h
+header-test-			+= kvm/arm_arch_timer.h
+header-test-			+= kvm/arm_pmu.h
+header-test-$(CONFIG_ARM)	+= kvm/arm_psci.h
+header-test-$(CONFIG_ARM64)	+= kvm/arm_psci.h
+header-test-			+= kvm/arm_vgic.h
+header-test-			+= linux/8250_pci.h
+header-test-			+= linux/a.out.h
+header-test-			+= linux/adxl.h
+header-test-			+= linux/agpgart.h
+header-test-			+= linux/alcor_pci.h
+header-test-			+= linux/amba/clcd.h
+header-test-			+= linux/amba/pl080.h
+header-test-			+= linux/amd-iommu.h
+header-test-$(CONFIG_ARM)	+= linux/arm-cci.h
+header-test-$(CONFIG_ARM64)	+= linux/arm-cci.h
+header-test-			+= linux/arm_sdei.h
+header-test-			+= linux/asn1_decoder.h
+header-test-			+= linux/ata_platform.h
+header-test-			+= linux/ath9k_platform.h
+header-test-			+= linux/atm_tcp.h
+header-test-			+= linux/atomic-fallback.h
+header-test-			+= linux/avf/virtchnl.h
+header-test-			+= linux/bcm47xx_sprom.h
+header-test-			+= linux/bcma/bcma_driver_gmac_cmn.h
+header-test-			+= linux/bcma/bcma_driver_mips.h
+header-test-			+= linux/bcma/bcma_driver_pci.h
+header-test-			+= linux/bcma/bcma_driver_pcie2.h
+header-test-			+= linux/bit_spinlock.h
+header-test-			+= linux/blk-mq-rdma.h
+header-test-			+= linux/blk-mq.h
+header-test-			+= linux/blktrace_api.h
+header-test-			+= linux/blockgroup_lock.h
+header-test-			+= linux/bma150.h
+header-test-			+= linux/bpf_lirc.h
+header-test-			+= linux/bpf_types.h
+header-test-			+= linux/bsg-lib.h
+header-test-			+= linux/bsg.h
+header-test-			+= linux/btf.h
+header-test-			+= linux/btree-128.h
+header-test-			+= linux/btree-type.h
+header-test-$(CONFIG_CPU_BIG_ENDIAN) += linux/byteorder/big_endian.h
+header-test-			+= linux/byteorder/generic.h
+header-test-$(CONFIG_CPU_LITTLE_ENDIAN) += linux/byteorder/little_endian.h
+header-test-			+= linux/c2port.h
+header-test-			+= linux/can/dev/peak_canfd.h
+header-test-			+= linux/can/platform/cc770.h
+header-test-			+= linux/can/platform/sja1000.h
+header-test-			+= linux/ceph/ceph_features.h
+header-test-			+= linux/ceph/ceph_frag.h
+header-test-			+= linux/ceph/ceph_fs.h
+header-test-			+= linux/ceph/debugfs.h
+header-test-			+= linux/ceph/msgr.h
+header-test-			+= linux/ceph/rados.h
+header-test-			+= linux/cgroup_subsys.h
+header-test-			+= linux/clk/sunxi-ng.h
+header-test-			+= linux/clk/ti.h
+header-test-			+= linux/cn_proc.h
+header-test-			+= linux/coda_psdev.h
+header-test-			+= linux/compaction.h
+header-test-			+= linux/console_struct.h
+header-test-			+= linux/count_zeros.h
+header-test-			+= linux/cs5535.h
+header-test-			+= linux/cuda.h
+header-test-			+= linux/cyclades.h
+header-test-			+= linux/dcookies.h
+header-test-			+= linux/delayacct.h
+header-test-			+= linux/delayed_call.h
+header-test-			+= linux/device-mapper.h
+header-test-			+= linux/devpts_fs.h
+header-test-			+= linux/dio.h
+header-test-			+= linux/dirent.h
+header-test-			+= linux/dlm_plock.h
+header-test-			+= linux/dm-dirty-log.h
+header-test-			+= linux/dm-region-hash.h
+header-test-			+= linux/dma-debug.h
+header-test-			+= linux/dma/mmp-pdma.h
+header-test-			+= linux/dma/sprd-dma.h
+header-test-			+= linux/dns_resolver.h
+header-test-			+= linux/drbd_genl.h
+header-test-			+= linux/drbd_genl_api.h
+header-test-			+= linux/dw_apb_timer.h
+header-test-			+= linux/dynamic_debug.h
+header-test-			+= linux/dynamic_queue_limits.h
+header-test-			+= linux/ecryptfs.h
+header-test-			+= linux/edma.h
+header-test-			+= linux/eeprom_93cx6.h
+header-test-			+= linux/efs_vh.h
+header-test-			+= linux/elevator.h
+header-test-			+= linux/elfcore-compat.h
+header-test-			+= linux/error-injection.h
+header-test-			+= linux/errseq.h
+header-test-			+= linux/eventpoll.h
+header-test-			+= linux/ext2_fs.h
+header-test-			+= linux/f75375s.h
+header-test-			+= linux/falloc.h
+header-test-			+= linux/fault-inject.h
+header-test-			+= linux/fbcon.h
+header-test-			+= linux/firmware/intel/stratix10-svc-client.h
+header-test-			+= linux/firmware/meson/meson_sm.h
+header-test-			+= linux/firmware/trusted_foundations.h
+header-test-			+= linux/firmware/xlnx-zynqmp.h
+header-test-			+= linux/fixp-arith.h
+header-test-			+= linux/flat.h
+header-test-			+= linux/fs_types.h
+header-test-			+= linux/fs_uart_pd.h
+header-test-			+= linux/fsi-occ.h
+header-test-			+= linux/fsi-sbefifo.h
+header-test-			+= linux/fsl/bestcomm/ata.h
+header-test-			+= linux/fsl/bestcomm/bestcomm.h
+header-test-			+= linux/fsl/bestcomm/bestcomm_priv.h
+header-test-			+= linux/fsl/bestcomm/fec.h
+header-test-			+= linux/fsl/bestcomm/gen_bd.h
+header-test-			+= linux/fsl/bestcomm/sram.h
+header-test-			+= linux/fsl_hypervisor.h
+header-test-			+= linux/fsldma.h
+header-test-			+= linux/ftrace_irq.h
+header-test-			+= linux/gameport.h
+header-test-			+= linux/genl_magic_func.h
+header-test-			+= linux/genl_magic_struct.h
+header-test-			+= linux/gpio/aspeed.h
+header-test-			+= linux/gpio/gpio-reg.h
+header-test-			+= linux/hid-debug.h
+header-test-			+= linux/hiddev.h
+header-test-			+= linux/hippidevice.h
+header-test-			+= linux/hmm.h
+header-test-			+= linux/hp_sdc.h
+header-test-			+= linux/huge_mm.h
+header-test-			+= linux/hugetlb_cgroup.h
+header-test-			+= linux/hugetlb_inline.h
+header-test-			+= linux/hwmon-vid.h
+header-test-			+= linux/hyperv.h
+header-test-			+= linux/i2c-algo-pca.h
+header-test-			+= linux/i2c-algo-pcf.h
+header-test-			+= linux/i3c/ccc.h
+header-test-			+= linux/i3c/device.h
+header-test-			+= linux/i3c/master.h
+header-test-			+= linux/i8042.h
+header-test-			+= linux/ide.h
+header-test-			+= linux/idle_inject.h
+header-test-			+= linux/if_frad.h
+header-test-			+= linux/if_rmnet.h
+header-test-			+= linux/if_tap.h
+header-test-			+= linux/iio/accel/kxcjk_1013.h
+header-test-			+= linux/iio/adc/ad_sigma_delta.h
+header-test-			+= linux/iio/buffer-dma.h
+header-test-			+= linux/iio/buffer_impl.h
+header-test-			+= linux/iio/common/st_sensors.h
+header-test-			+= linux/iio/common/st_sensors_i2c.h
+header-test-			+= linux/iio/common/st_sensors_spi.h
+header-test-			+= linux/iio/dac/ad5421.h
+header-test-			+= linux/iio/dac/ad5504.h
+header-test-			+= linux/iio/dac/ad5791.h
+header-test-			+= linux/iio/dac/max517.h
+header-test-			+= linux/iio/dac/mcp4725.h
+header-test-			+= linux/iio/frequency/ad9523.h
+header-test-			+= linux/iio/frequency/adf4350.h
+header-test-			+= linux/iio/hw-consumer.h
+header-test-			+= linux/iio/imu/adis.h
+header-test-			+= linux/iio/sysfs.h
+header-test-			+= linux/iio/timer/stm32-timer-trigger.h
+header-test-			+= linux/iio/trigger.h
+header-test-			+= linux/iio/triggered_event.h
+header-test-			+= linux/imx-media.h
+header-test-			+= linux/inet_diag.h
+header-test-			+= linux/init_ohci1394_dma.h
+header-test-			+= linux/initrd.h
+header-test-			+= linux/input/adp5589.h
+header-test-			+= linux/input/bu21013.h
+header-test-			+= linux/input/cma3000.h
+header-test-			+= linux/input/kxtj9.h
+header-test-			+= linux/input/lm8333.h
+header-test-			+= linux/input/sparse-keymap.h
+header-test-			+= linux/input/touchscreen.h
+header-test-			+= linux/input/tps6507x-ts.h
+header-test-$(CONFIG_X86)	+= linux/intel-iommu.h
+header-test-			+= linux/intel-ish-client-if.h
+header-test-			+= linux/intel-pti.h
+header-test-			+= linux/intel-svm.h
+header-test-			+= linux/interconnect-provider.h
+header-test-			+= linux/ioc3.h
+header-test-			+= linux/ipack.h
+header-test-			+= linux/irq_cpustat.h
+header-test-			+= linux/irq_poll.h
+header-test-			+= linux/irqchip/arm-gic-v3.h
+header-test-			+= linux/irqchip/arm-gic-v4.h
+header-test-			+= linux/irqchip/irq-madera.h
+header-test-			+= linux/irqchip/irq-sa11x0.h
+header-test-			+= linux/irqchip/mxs.h
+header-test-			+= linux/irqchip/versatile-fpga.h
+header-test-			+= linux/irqdesc.h
+header-test-			+= linux/irqflags.h
+header-test-			+= linux/iscsi_boot_sysfs.h
+header-test-			+= linux/isdn/capiutil.h
+header-test-			+= linux/isdn/hdlc.h
+header-test-			+= linux/isdn_ppp.h
+header-test-			+= linux/jbd2.h
+header-test-			+= linux/jump_label.h
+header-test-			+= linux/jump_label_ratelimit.h
+header-test-			+= linux/jz4740-adc.h
+header-test-			+= linux/kasan.h
+header-test-			+= linux/kcore.h
+header-test-			+= linux/kdev_t.h
+header-test-			+= linux/kernelcapi.h
+header-test-			+= linux/khugepaged.h
+header-test-			+= linux/kobj_map.h
+header-test-			+= linux/kobject_ns.h
+header-test-			+= linux/kvm_host.h
+header-test-			+= linux/kvm_irqfd.h
+header-test-			+= linux/kvm_para.h
+header-test-			+= linux/lantiq.h
+header-test-			+= linux/lapb.h
+header-test-			+= linux/latencytop.h
+header-test-			+= linux/led-lm3530.h
+header-test-			+= linux/leds-bd2802.h
+header-test-			+= linux/leds-lp3944.h
+header-test-			+= linux/leds-lp3952.h
+header-test-			+= linux/leds_pwm.h
+header-test-			+= linux/libata.h
+header-test-			+= linux/license.h
+header-test-			+= linux/lightnvm.h
+header-test-			+= linux/lis3lv02d.h
+header-test-			+= linux/list_bl.h
+header-test-			+= linux/list_lru.h
+header-test-			+= linux/list_nulls.h
+header-test-			+= linux/lockd/share.h
+header-test-			+= linux/lzo.h
+header-test-			+= linux/mailbox/zynqmp-ipi-message.h
+header-test-			+= linux/maple.h
+header-test-			+= linux/mbcache.h
+header-test-			+= linux/mbus.h
+header-test-			+= linux/mc146818rtc.h
+header-test-			+= linux/mc6821.h
+header-test-			+= linux/mdev.h
+header-test-			+= linux/mem_encrypt.h
+header-test-			+= linux/memfd.h
+header-test-			+= linux/mfd/88pm80x.h
+header-test-			+= linux/mfd/88pm860x.h
+header-test-			+= linux/mfd/abx500/ab8500-bm.h
+header-test-			+= linux/mfd/abx500/ab8500-gpadc.h
+header-test-			+= linux/mfd/adp5520.h
+header-test-			+= linux/mfd/arizona/pdata.h
+header-test-			+= linux/mfd/as3711.h
+header-test-			+= linux/mfd/as3722.h
+header-test-			+= linux/mfd/cros_ec_commands.h
+header-test-			+= linux/mfd/da903x.h
+header-test-			+= linux/mfd/da9055/pdata.h
+header-test-			+= linux/mfd/da9063/pdata.h
+header-test-			+= linux/mfd/db8500-prcmu.h
+header-test-			+= linux/mfd/dbx500-prcmu.h
+header-test-			+= linux/mfd/dln2.h
+header-test-			+= linux/mfd/dm355evm_msp.h
+header-test-			+= linux/mfd/ds1wm.h
+header-test-			+= linux/mfd/ezx-pcap.h
+header-test-			+= linux/mfd/intel_msic.h
+header-test-			+= linux/mfd/janz.h
+header-test-			+= linux/mfd/kempld.h
+header-test-			+= linux/mfd/lm3533.h
+header-test-			+= linux/mfd/lp8788-isink.h
+header-test-			+= linux/mfd/lpc_ich.h
+header-test-			+= linux/mfd/max77693.h
+header-test-			+= linux/mfd/max8998-private.h
+header-test-			+= linux/mfd/menelaus.h
+header-test-			+= linux/mfd/mt6397/core.h
+header-test-			+= linux/mfd/palmas.h
+header-test-			+= linux/mfd/pcf50633/backlight.h
+header-test-			+= linux/mfd/rc5t583.h
+header-test-			+= linux/mfd/retu.h
+header-test-			+= linux/mfd/samsung/core.h
+header-test-			+= linux/mfd/si476x-platform.h
+header-test-			+= linux/mfd/si476x-reports.h
+header-test-			+= linux/mfd/sky81452.h
+header-test-			+= linux/mfd/smsc.h
+header-test-			+= linux/mfd/sta2x11-mfd.h
+header-test-			+= linux/mfd/stmfx.h
+header-test-			+= linux/mfd/tc3589x.h
+header-test-			+= linux/mfd/tc6387xb.h
+header-test-			+= linux/mfd/tc6393xb.h
+header-test-			+= linux/mfd/tps65090.h
+header-test-			+= linux/mfd/tps6586x.h
+header-test-			+= linux/mfd/tps65910.h
+header-test-			+= linux/mfd/tps80031.h
+header-test-			+= linux/mfd/ucb1x00.h
+header-test-			+= linux/mfd/viperboard.h
+header-test-			+= linux/mfd/wm831x/core.h
+header-test-			+= linux/mfd/wm831x/otp.h
+header-test-			+= linux/mfd/wm831x/pdata.h
+header-test-			+= linux/mfd/wm8994/core.h
+header-test-			+= linux/mfd/wm8994/pdata.h
+header-test-			+= linux/mlx4/doorbell.h
+header-test-			+= linux/mlx4/srq.h
+header-test-			+= linux/mlx5/doorbell.h
+header-test-			+= linux/mlx5/eq.h
+header-test-			+= linux/mlx5/fs_helpers.h
+header-test-			+= linux/mlx5/mlx5_ifc.h
+header-test-			+= linux/mlx5/mlx5_ifc_fpga.h
+header-test-			+= linux/mm-arch-hooks.h
+header-test-			+= linux/mm_inline.h
+header-test-			+= linux/mmu_context.h
+header-test-			+= linux/mpage.h
+header-test-			+= linux/mtd/bbm.h
+header-test-			+= linux/mtd/cfi.h
+header-test-			+= linux/mtd/doc2000.h
+header-test-			+= linux/mtd/flashchip.h
+header-test-			+= linux/mtd/ftl.h
+header-test-			+= linux/mtd/gen_probe.h
+header-test-			+= linux/mtd/jedec.h
+header-test-			+= linux/mtd/nand_bch.h
+header-test-			+= linux/mtd/nand_ecc.h
+header-test-			+= linux/mtd/ndfc.h
+header-test-			+= linux/mtd/onenand.h
+header-test-			+= linux/mtd/pismo.h
+header-test-			+= linux/mtd/plat-ram.h
+header-test-			+= linux/mtd/spi-nor.h
+header-test-			+= linux/mv643xx.h
+header-test-			+= linux/mv643xx_eth.h
+header-test-			+= linux/mvebu-pmsu.h
+header-test-			+= linux/mxm-wmi.h
+header-test-			+= linux/n_r3964.h
+header-test-			+= linux/ndctl.h
+header-test-			+= linux/netfilter/ipset/ip_set.h
+header-test-			+= linux/netfilter/ipset/ip_set_bitmap.h
+header-test-			+= linux/netfilter/ipset/ip_set_comment.h
+header-test-			+= linux/netfilter/ipset/ip_set_counter.h
+header-test-			+= linux/netfilter/ipset/ip_set_getport.h
+header-test-			+= linux/netfilter/ipset/ip_set_hash.h
+header-test-			+= linux/netfilter/ipset/ip_set_list.h
+header-test-			+= linux/netfilter/ipset/ip_set_skbinfo.h
+header-test-			+= linux/netfilter/ipset/ip_set_timeout.h
+header-test-			+= linux/netfilter/nf_conntrack_amanda.h
+header-test-			+= linux/netfilter/nf_conntrack_ftp.h
+header-test-			+= linux/netfilter/nf_conntrack_h323.h
+header-test-			+= linux/netfilter/nf_conntrack_h323_asn1.h
+header-test-			+= linux/netfilter/nf_conntrack_irc.h
+header-test-			+= linux/netfilter/nf_conntrack_pptp.h
+header-test-			+= linux/netfilter/nf_conntrack_proto_gre.h
+header-test-			+= linux/netfilter/nf_conntrack_sip.h
+header-test-			+= linux/netfilter/nf_conntrack_snmp.h
+header-test-			+= linux/netfilter/nf_conntrack_tftp.h
+header-test-			+= linux/netfilter/x_tables.h
+header-test-			+= linux/netfilter_arp/arp_tables.h
+header-test-			+= linux/netfilter_bridge/ebtables.h
+header-test-			+= linux/netfilter_ipv4/ip4_tables.h
+header-test-			+= linux/netfilter_ipv4/ip_tables.h
+header-test-			+= linux/netfilter_ipv6/ip6_tables.h
+header-test-			+= linux/nfs.h
+header-test-			+= linux/nfs_fs_i.h
+header-test-			+= linux/nfs_fs_sb.h
+header-test-			+= linux/nfs_page.h
+header-test-			+= linux/nfs_xdr.h
+header-test-			+= linux/nfsacl.h
+header-test-			+= linux/nl802154.h
+header-test-			+= linux/ns_common.h
+header-test-			+= linux/nsc_gpio.h
+header-test-			+= linux/ntb_transport.h
+header-test-			+= linux/nubus.h
+header-test-			+= linux/nvme-fc-driver.h
+header-test-			+= linux/nvme-fc.h
+header-test-			+= linux/nvme-rdma.h
+header-test-			+= linux/nvram.h
+header-test-			+= linux/objagg.h
+header-test-			+= linux/of_clk.h
+header-test-			+= linux/of_net.h
+header-test-			+= linux/of_pdt.h
+header-test-			+= linux/olpc-ec.h
+header-test-			+= linux/omap-dma.h
+header-test-			+= linux/omap-dmaengine.h
+header-test-			+= linux/omap-gpmc.h
+header-test-			+= linux/omap-iommu.h
+header-test-			+= linux/omap-mailbox.h
+header-test-			+= linux/once.h
+header-test-			+= linux/osq_lock.h
+header-test-			+= linux/overflow.h
+header-test-			+= linux/page-flags-layout.h
+header-test-			+= linux/page-isolation.h
+header-test-			+= linux/page_ext.h
+header-test-			+= linux/page_owner.h
+header-test-			+= linux/parport_pc.h
+header-test-			+= linux/parser.h
+header-test-			+= linux/pci-acpi.h
+header-test-			+= linux/pci-dma-compat.h
+header-test-			+= linux/pci_hotplug.h
+header-test-			+= linux/pda_power.h
+header-test-			+= linux/perf/arm_pmu.h
+header-test-			+= linux/perf_regs.h
+header-test-			+= linux/phy/omap_control_phy.h
+header-test-			+= linux/phy/tegra/xusb.h
+header-test-			+= linux/phy/ulpi_phy.h
+header-test-			+= linux/phy_fixed.h
+header-test-			+= linux/pinctrl/pinconf-generic.h
+header-test-			+= linux/pinctrl/pinconf.h
+header-test-			+= linux/pinctrl/pinctrl.h
+header-test-			+= linux/pipe_fs_i.h
+header-test-			+= linux/pktcdvd.h
+header-test-			+= linux/pl320-ipc.h
+header-test-			+= linux/pl353-smc.h
+header-test-			+= linux/platform_data/ad5449.h
+header-test-			+= linux/platform_data/ad5755.h
+header-test-			+= linux/platform_data/ad7266.h
+header-test-			+= linux/platform_data/ad7291.h
+header-test-			+= linux/platform_data/ad7298.h
+header-test-			+= linux/platform_data/ad7303.h
+header-test-			+= linux/platform_data/ad7791.h
+header-test-			+= linux/platform_data/ad7793.h
+header-test-			+= linux/platform_data/ad7887.h
+header-test-			+= linux/platform_data/adau17x1.h
+header-test-			+= linux/platform_data/adp8870.h
+header-test-			+= linux/platform_data/ads1015.h
+header-test-			+= linux/platform_data/ads7828.h
+header-test-			+= linux/platform_data/apds990x.h
+header-test-			+= linux/platform_data/arm-ux500-pm.h
+header-test-			+= linux/platform_data/asoc-s3c.h
+header-test-			+= linux/platform_data/at91_adc.h
+header-test-			+= linux/platform_data/ata-pxa.h
+header-test-			+= linux/platform_data/atmel.h
+header-test-			+= linux/platform_data/bh1770glc.h
+header-test-			+= linux/platform_data/brcmfmac.h
+header-test-			+= linux/platform_data/clk-u300.h
+header-test-			+= linux/platform_data/cyttsp4.h
+header-test-			+= linux/platform_data/dma-coh901318.h
+header-test-			+= linux/platform_data/dma-imx-sdma.h
+header-test-			+= linux/platform_data/dma-mcf-edma.h
+header-test-			+= linux/platform_data/dma-s3c24xx.h
+header-test-			+= linux/platform_data/dmtimer-omap.h
+header-test-			+= linux/platform_data/dsa.h
+header-test-			+= linux/platform_data/edma.h
+header-test-			+= linux/platform_data/elm.h
+header-test-			+= linux/platform_data/emif_plat.h
+header-test-			+= linux/platform_data/fsa9480.h
+header-test-			+= linux/platform_data/g762.h
+header-test-			+= linux/platform_data/gpio-ath79.h
+header-test-			+= linux/platform_data/gpio-davinci.h
+header-test-			+= linux/platform_data/gpio-dwapb.h
+header-test-			+= linux/platform_data/gpio-htc-egpio.h
+header-test-			+= linux/platform_data/gpmc-omap.h
+header-test-			+= linux/platform_data/hsmmc-omap.h
+header-test-			+= linux/platform_data/hwmon-s3c.h
+header-test-			+= linux/platform_data/i2c-davinci.h
+header-test-			+= linux/platform_data/i2c-imx.h
+header-test-			+= linux/platform_data/i2c-mux-reg.h
+header-test-			+= linux/platform_data/i2c-ocores.h
+header-test-			+= linux/platform_data/i2c-xiic.h
+header-test-			+= linux/platform_data/intel-spi.h
+header-test-			+= linux/platform_data/invensense_mpu6050.h
+header-test-			+= linux/platform_data/irda-pxaficp.h
+header-test-			+= linux/platform_data/irda-sa11x0.h
+header-test-			+= linux/platform_data/itco_wdt.h
+header-test-			+= linux/platform_data/jz4740/jz4740_nand.h
+header-test-			+= linux/platform_data/keyboard-pxa930_rotary.h
+header-test-			+= linux/platform_data/keypad-omap.h
+header-test-			+= linux/platform_data/leds-lp55xx.h
+header-test-			+= linux/platform_data/leds-omap.h
+header-test-			+= linux/platform_data/lp855x.h
+header-test-			+= linux/platform_data/lp8727.h
+header-test-			+= linux/platform_data/max197.h
+header-test-			+= linux/platform_data/max3421-hcd.h
+header-test-			+= linux/platform_data/max732x.h
+header-test-			+= linux/platform_data/mcs.h
+header-test-			+= linux/platform_data/mdio-bcm-unimac.h
+header-test-			+= linux/platform_data/mdio-gpio.h
+header-test-			+= linux/platform_data/media/si4713.h
+header-test-			+= linux/platform_data/mlxreg.h
+header-test-			+= linux/platform_data/mmc-omap.h
+header-test-			+= linux/platform_data/mmc-sdhci-s3c.h
+header-test-			+= linux/platform_data/mmp_audio.h
+header-test-			+= linux/platform_data/mtd-orion_nand.h
+header-test-			+= linux/platform_data/mv88e6xxx.h
+header-test-			+= linux/platform_data/net-cw1200.h
+header-test-			+= linux/platform_data/omap-twl4030.h
+header-test-			+= linux/platform_data/omapdss.h
+header-test-			+= linux/platform_data/pcf857x.h
+header-test-			+= linux/platform_data/pixcir_i2c_ts.h
+header-test-			+= linux/platform_data/pwm_omap_dmtimer.h
+header-test-			+= linux/platform_data/pxa2xx_udc.h
+header-test-			+= linux/platform_data/pxa_sdhci.h
+header-test-			+= linux/platform_data/remoteproc-omap.h
+header-test-			+= linux/platform_data/sa11x0-serial.h
+header-test-			+= linux/platform_data/sc18is602.h
+header-test-			+= linux/platform_data/sdhci-pic32.h
+header-test-			+= linux/platform_data/serial-sccnxp.h
+header-test-			+= linux/platform_data/sht3x.h
+header-test-			+= linux/platform_data/shtc1.h
+header-test-			+= linux/platform_data/si5351.h
+header-test-			+= linux/platform_data/sky81452-backlight.h
+header-test-			+= linux/platform_data/spi-davinci.h
+header-test-			+= linux/platform_data/spi-ep93xx.h
+header-test-			+= linux/platform_data/spi-mt65xx.h
+header-test-			+= linux/platform_data/spi-nuc900.h
+header-test-			+= linux/platform_data/st_sensors_pdata.h
+header-test-			+= linux/platform_data/ti-sysc.h
+header-test-			+= linux/platform_data/timer-ixp4xx.h
+header-test-			+= linux/platform_data/touchscreen-s3c2410.h
+header-test-			+= linux/platform_data/tsc2007.h
+header-test-			+= linux/platform_data/tsl2772.h
+header-test-			+= linux/platform_data/uio_pruss.h
+header-test-			+= linux/platform_data/usb-davinci.h
+header-test-			+= linux/platform_data/usb-ehci-mxc.h
+header-test-			+= linux/platform_data/usb-ehci-orion.h
+header-test-			+= linux/platform_data/usb-mx2.h
+header-test-			+= linux/platform_data/usb-ohci-s3c2410.h
+header-test-			+= linux/platform_data/usb-omap.h
+header-test-			+= linux/platform_data/usb-s3c2410_udc.h
+header-test-			+= linux/platform_data/usb3503.h
+header-test-			+= linux/platform_data/ux500_wdt.h
+header-test-			+= linux/platform_data/video-clcd-versatile.h
+header-test-			+= linux/platform_data/video-imxfb.h
+header-test-			+= linux/platform_data/video-nuc900fb.h
+header-test-			+= linux/platform_data/video-pxafb.h
+header-test-			+= linux/platform_data/video_s3c.h
+header-test-			+= linux/platform_data/voltage-omap.h
+header-test-			+= linux/platform_data/x86/apple.h
+header-test-			+= linux/platform_data/x86/clk-pmc-atom.h
+header-test-			+= linux/platform_data/x86/pmc_atom.h
+header-test-			+= linux/platform_data/xtalk-bridge.h
+header-test-			+= linux/pm2301_charger.h
+header-test-			+= linux/pm_wakeirq.h
+header-test-			+= linux/pm_wakeup.h
+header-test-			+= linux/pmbus.h
+header-test-			+= linux/pmu.h
+header-test-			+= linux/posix_acl.h
+header-test-			+= linux/posix_acl_xattr.h
+header-test-			+= linux/power/ab8500.h
+header-test-			+= linux/power/bq27xxx_battery.h
+header-test-			+= linux/power/generic-adc-battery.h
+header-test-			+= linux/power/jz4740-battery.h
+header-test-			+= linux/power/max17042_battery.h
+header-test-			+= linux/power/max8903_charger.h
+header-test-			+= linux/ppp-comp.h
+header-test-			+= linux/pps-gpio.h
+header-test-			+= linux/pr.h
+header-test-			+= linux/proc_ns.h
+header-test-			+= linux/processor.h
+header-test-			+= linux/psi.h
+header-test-			+= linux/psp-sev.h
+header-test-			+= linux/pstore.h
+header-test-			+= linux/ptr_ring.h
+header-test-			+= linux/ptrace.h
+header-test-			+= linux/qcom-geni-se.h
+header-test-			+= linux/qed/eth_common.h
+header-test-			+= linux/qed/fcoe_common.h
+header-test-			+= linux/qed/iscsi_common.h
+header-test-			+= linux/qed/iwarp_common.h
+header-test-			+= linux/qed/qed_eth_if.h
+header-test-			+= linux/qed/qed_fcoe_if.h
+header-test-			+= linux/qed/rdma_common.h
+header-test-			+= linux/qed/storage_common.h
+header-test-			+= linux/qed/tcp_common.h
+header-test-			+= linux/qnx6_fs.h
+header-test-			+= linux/quicklist.h
+header-test-			+= linux/ramfs.h
+header-test-			+= linux/range.h
+header-test-			+= linux/rcu_node_tree.h
+header-test-			+= linux/rculist_bl.h
+header-test-			+= linux/rculist_nulls.h
+header-test-			+= linux/rcutiny.h
+header-test-			+= linux/rcutree.h
+header-test-			+= linux/reboot-mode.h
+header-test-			+= linux/regulator/fixed.h
+header-test-			+= linux/regulator/gpio-regulator.h
+header-test-			+= linux/regulator/max8973-regulator.h
+header-test-			+= linux/regulator/of_regulator.h
+header-test-			+= linux/regulator/tps51632-regulator.h
+header-test-			+= linux/regulator/tps62360.h
+header-test-			+= linux/regulator/tps6507x.h
+header-test-			+= linux/regulator/userspace-consumer.h
+header-test-			+= linux/remoteproc/st_slim_rproc.h
+header-test-			+= linux/reset/socfpga.h
+header-test-			+= linux/reset/sunxi.h
+header-test-			+= linux/rtc/m48t59.h
+header-test-			+= linux/rtc/rtc-omap.h
+header-test-			+= linux/rtc/sirfsoc_rtciobrg.h
+header-test-			+= linux/rwlock.h
+header-test-			+= linux/rwlock_types.h
+header-test-			+= linux/scc.h
+header-test-			+= linux/sched/deadline.h
+header-test-			+= linux/sched/smt.h
+header-test-			+= linux/sched/sysctl.h
+header-test-			+= linux/sched_clock.h
+header-test-			+= linux/scpi_protocol.h
+header-test-			+= linux/scx200_gpio.h
+header-test-			+= linux/seccomp.h
+header-test-			+= linux/sed-opal.h
+header-test-			+= linux/seg6_iptunnel.h
+header-test-			+= linux/selection.h
+header-test-			+= linux/set_memory.h
+header-test-			+= linux/shrinker.h
+header-test-			+= linux/sirfsoc_dma.h
+header-test-			+= linux/skb_array.h
+header-test-			+= linux/slab_def.h
+header-test-			+= linux/slub_def.h
+header-test-			+= linux/sm501.h
+header-test-			+= linux/smc91x.h
+header-test-			+= linux/static_key.h
+header-test-			+= linux/soc/actions/owl-sps.h
+header-test-			+= linux/soc/amlogic/meson-canvas.h
+header-test-			+= linux/soc/brcmstb/brcmstb.h
+header-test-			+= linux/soc/ixp4xx/npe.h
+header-test-			+= linux/soc/mediatek/infracfg.h
+header-test-			+= linux/soc/qcom/smd-rpm.h
+header-test-			+= linux/soc/qcom/smem.h
+header-test-			+= linux/soc/qcom/smem_state.h
+header-test-			+= linux/soc/qcom/wcnss_ctrl.h
+header-test-			+= linux/soc/renesas/rcar-rst.h
+header-test-			+= linux/soc/samsung/exynos-pmu.h
+header-test-			+= linux/soc/sunxi/sunxi_sram.h
+header-test-			+= linux/soc/ti/ti-msgmgr.h
+header-test-			+= linux/soc/ti/ti_sci_inta_msi.h
+header-test-			+= linux/soc/ti/ti_sci_protocol.h
+header-test-			+= linux/soundwire/sdw.h
+header-test-			+= linux/soundwire/sdw_intel.h
+header-test-			+= linux/soundwire/sdw_type.h
+header-test-			+= linux/spi/ad7877.h
+header-test-			+= linux/spi/ads7846.h
+header-test-			+= linux/spi/at86rf230.h
+header-test-			+= linux/spi/ds1305.h
+header-test-			+= linux/spi/libertas_spi.h
+header-test-			+= linux/spi/lms283gf05.h
+header-test-			+= linux/spi/max7301.h
+header-test-			+= linux/spi/mcp23s08.h
+header-test-			+= linux/spi/rspi.h
+header-test-			+= linux/spi/s3c24xx.h
+header-test-			+= linux/spi/sh_msiof.h
+header-test-			+= linux/spi/spi-fsl-dspi.h
+header-test-			+= linux/spi/spi_bitbang.h
+header-test-			+= linux/spi/spi_gpio.h
+header-test-			+= linux/spi/xilinx_spi.h
+header-test-			+= linux/spinlock_api_smp.h
+header-test-			+= linux/spinlock_api_up.h
+header-test-			+= linux/spinlock_types.h
+header-test-			+= linux/splice.h
+header-test-			+= linux/sram.h
+header-test-			+= linux/srcutiny.h
+header-test-			+= linux/srcutree.h
+header-test-			+= linux/ssb/ssb_driver_chipcommon.h
+header-test-			+= linux/ssb/ssb_driver_extif.h
+header-test-			+= linux/ssb/ssb_driver_mips.h
+header-test-			+= linux/ssb/ssb_driver_pci.h
+header-test-			+= linux/ssbi.h
+header-test-			+= linux/stackdepot.h
+header-test-			+= linux/stmp3xxx_rtc_wdt.h
+header-test-			+= linux/string_helpers.h
+header-test-			+= linux/sungem_phy.h
+header-test-			+= linux/sunrpc/msg_prot.h
+header-test-			+= linux/sunrpc/rpc_pipe_fs.h
+header-test-			+= linux/sunrpc/xprtmultipath.h
+header-test-			+= linux/sunrpc/xprtsock.h
+header-test-			+= linux/sunxi-rsb.h
+header-test-			+= linux/svga.h
+header-test-			+= linux/sw842.h
+header-test-			+= linux/swapfile.h
+header-test-			+= linux/swapops.h
+header-test-			+= linux/swiotlb.h
+header-test-			+= linux/sysv_fs.h
+header-test-			+= linux/t10-pi.h
+header-test-			+= linux/task_io_accounting.h
+header-test-			+= linux/tick.h
+header-test-			+= linux/timb_dma.h
+header-test-			+= linux/timekeeping.h
+header-test-			+= linux/timekeeping32.h
+header-test-			+= linux/ts-nbus.h
+header-test-			+= linux/tsacct_kern.h
+header-test-			+= linux/tty_flip.h
+header-test-			+= linux/tty_ldisc.h
+header-test-			+= linux/ucb1400.h
+header-test-			+= linux/usb/association.h
+header-test-			+= linux/usb/cdc-wdm.h
+header-test-			+= linux/usb/cdc_ncm.h
+header-test-			+= linux/usb/ezusb.h
+header-test-			+= linux/usb/gadget_configfs.h
+header-test-			+= linux/usb/gpio_vbus.h
+header-test-			+= linux/usb/hcd.h
+header-test-			+= linux/usb/iowarrior.h
+header-test-			+= linux/usb/irda.h
+header-test-			+= linux/usb/isp116x.h
+header-test-			+= linux/usb/isp1362.h
+header-test-			+= linux/usb/musb.h
+header-test-			+= linux/usb/net2280.h
+header-test-			+= linux/usb/ohci_pdriver.h
+header-test-			+= linux/usb/otg-fsm.h
+header-test-			+= linux/usb/pd_ado.h
+header-test-			+= linux/usb/r8a66597.h
+header-test-			+= linux/usb/rndis_host.h
+header-test-			+= linux/usb/serial.h
+header-test-			+= linux/usb/sl811.h
+header-test-			+= linux/usb/storage.h
+header-test-			+= linux/usb/uas.h
+header-test-			+= linux/usb/usb338x.h
+header-test-			+= linux/usb/usbnet.h
+header-test-			+= linux/usb/wusb-wa.h
+header-test-			+= linux/usb/xhci-dbgp.h
+header-test-			+= linux/usb_usual.h
+header-test-			+= linux/user-return-notifier.h
+header-test-			+= linux/userfaultfd_k.h
+header-test-			+= linux/verification.h
+header-test-			+= linux/vgaarb.h
+header-test-			+= linux/via_core.h
+header-test-			+= linux/via_i2c.h
+header-test-			+= linux/virtio_byteorder.h
+header-test-			+= linux/virtio_ring.h
+header-test-			+= linux/visorbus.h
+header-test-			+= linux/vme.h
+header-test-			+= linux/vmstat.h
+header-test-			+= linux/vmw_vmci_api.h
+header-test-			+= linux/vmw_vmci_defs.h
+header-test-			+= linux/vringh.h
+header-test-			+= linux/vt_buffer.h
+header-test-			+= linux/zorro.h
+header-test-			+= linux/zpool.h
+header-test-			+= math-emu/double.h
+header-test-			+= math-emu/op-common.h
+header-test-			+= math-emu/quad.h
+header-test-			+= math-emu/single.h
+header-test-			+= math-emu/soft-fp.h
+header-test-			+= media/davinci/dm355_ccdc.h
+header-test-			+= media/davinci/dm644x_ccdc.h
+header-test-			+= media/davinci/isif.h
+header-test-			+= media/davinci/vpbe_osd.h
+header-test-			+= media/davinci/vpbe_types.h
+header-test-			+= media/davinci/vpif_types.h
+header-test-			+= media/demux.h
+header-test-			+= media/drv-intf/soc_mediabus.h
+header-test-			+= media/dvb_net.h
+header-test-			+= media/fwht-ctrls.h
+header-test-			+= media/i2c/ad9389b.h
+header-test-			+= media/i2c/adv7343.h
+header-test-			+= media/i2c/adv7511.h
+header-test-			+= media/i2c/adv7842.h
+header-test-			+= media/i2c/m5mols.h
+header-test-			+= media/i2c/mt9m032.h
+header-test-			+= media/i2c/mt9t112.h
+header-test-			+= media/i2c/mt9v032.h
+header-test-			+= media/i2c/ov2659.h
+header-test-			+= media/i2c/ov7670.h
+header-test-			+= media/i2c/rj54n1cb0c.h
+header-test-			+= media/i2c/saa6588.h
+header-test-			+= media/i2c/saa7115.h
+header-test-			+= media/i2c/sr030pc30.h
+header-test-			+= media/i2c/tc358743.h
+header-test-			+= media/i2c/tda1997x.h
+header-test-			+= media/i2c/ths7303.h
+header-test-			+= media/i2c/tvaudio.h
+header-test-			+= media/i2c/tvp514x.h
+header-test-			+= media/i2c/tvp7002.h
+header-test-			+= media/i2c/wm8775.h
+header-test-			+= media/imx.h
+header-test-			+= media/media-dev-allocator.h
+header-test-			+= media/mpeg2-ctrls.h
+header-test-			+= media/rcar-fcp.h
+header-test-			+= media/tuner-types.h
+header-test-			+= media/tveeprom.h
+header-test-			+= media/v4l2-flash-led-class.h
+header-test-			+= misc/altera.h
+header-test-			+= misc/cxl-base.h
+header-test-			+= misc/cxllib.h
+header-test-			+= net/9p/9p.h
+header-test-			+= net/9p/client.h
+header-test-			+= net/9p/transport.h
+header-test-			+= net/af_vsock.h
+header-test-			+= net/ax88796.h
+header-test-			+= net/bluetooth/hci.h
+header-test-			+= net/bluetooth/hci_core.h
+header-test-			+= net/bluetooth/hci_mon.h
+header-test-			+= net/bluetooth/hci_sock.h
+header-test-			+= net/bluetooth/l2cap.h
+header-test-			+= net/bluetooth/mgmt.h
+header-test-			+= net/bluetooth/rfcomm.h
+header-test-			+= net/bluetooth/sco.h
+header-test-			+= net/bond_options.h
+header-test-			+= net/caif/cfsrvl.h
+header-test-			+= net/codel_impl.h
+header-test-			+= net/codel_qdisc.h
+header-test-			+= net/compat.h
+header-test-			+= net/datalink.h
+header-test-			+= net/dcbevent.h
+header-test-			+= net/dcbnl.h
+header-test-			+= net/dn_dev.h
+header-test-			+= net/dn_fib.h
+header-test-			+= net/dn_neigh.h
+header-test-			+= net/dn_nsp.h
+header-test-			+= net/dn_route.h
+header-test-			+= net/erspan.h
+header-test-			+= net/esp.h
+header-test-			+= net/ethoc.h
+header-test-			+= net/firewire.h
+header-test-			+= net/flow_offload.h
+header-test-			+= net/fq.h
+header-test-			+= net/fq_impl.h
+header-test-			+= net/garp.h
+header-test-			+= net/gtp.h
+header-test-			+= net/gue.h
+header-test-			+= net/hwbm.h
+header-test-			+= net/ila.h
+header-test-			+= net/inet6_connection_sock.h
+header-test-			+= net/inet_common.h
+header-test-			+= net/inet_frag.h
+header-test-			+= net/ip6_route.h
+header-test-			+= net/ip_vs.h
+header-test-			+= net/ipcomp.h
+header-test-			+= net/ipconfig.h
+header-test-			+= net/iucv/af_iucv.h
+header-test-			+= net/iucv/iucv.h
+header-test-			+= net/lapb.h
+header-test-			+= net/llc_c_ac.h
+header-test-			+= net/llc_c_st.h
+header-test-			+= net/llc_s_ac.h
+header-test-			+= net/llc_s_ev.h
+header-test-			+= net/llc_s_st.h
+header-test-			+= net/mpls_iptunnel.h
+header-test-			+= net/mrp.h
+header-test-			+= net/ncsi.h
+header-test-			+= net/netevent.h
+header-test-			+= net/netfilter/br_netfilter.h
+header-test-			+= net/netfilter/ipv4/nf_dup_ipv4.h
+header-test-			+= net/netfilter/ipv6/nf_defrag_ipv6.h
+header-test-			+= net/netfilter/ipv6/nf_dup_ipv6.h
+header-test-			+= net/netfilter/nf_conntrack.h
+header-test-			+= net/netfilter/nf_conntrack_acct.h
+header-test-			+= net/netfilter/nf_conntrack_bridge.h
+header-test-			+= net/netfilter/nf_conntrack_core.h
+header-test-			+= net/netfilter/nf_conntrack_count.h
+header-test-			+= net/netfilter/nf_conntrack_ecache.h
+header-test-			+= net/netfilter/nf_conntrack_expect.h
+header-test-			+= net/netfilter/nf_conntrack_extend.h
+header-test-			+= net/netfilter/nf_conntrack_helper.h
+header-test-			+= net/netfilter/nf_conntrack_l4proto.h
+header-test-			+= net/netfilter/nf_conntrack_labels.h
+header-test-			+= net/netfilter/nf_conntrack_seqadj.h
+header-test-			+= net/netfilter/nf_conntrack_synproxy.h
+header-test-			+= net/netfilter/nf_conntrack_timeout.h
+header-test-			+= net/netfilter/nf_conntrack_timestamp.h
+header-test-			+= net/netfilter/nf_conntrack_tuple.h
+header-test-			+= net/netfilter/nf_dup_netdev.h
+header-test-			+= net/netfilter/nf_flow_table.h
+header-test-			+= net/netfilter/nf_nat.h
+header-test-			+= net/netfilter/nf_nat_helper.h
+header-test-			+= net/netfilter/nf_nat_masquerade.h
+header-test-			+= net/netfilter/nf_nat_redirect.h
+header-test-			+= net/netfilter/nf_queue.h
+header-test-			+= net/netfilter/nf_reject.h
+header-test-			+= net/netfilter/nf_synproxy.h
+header-test-			+= net/netfilter/nf_tables.h
+header-test-			+= net/netfilter/nf_tables_core.h
+header-test-			+= net/netfilter/nf_tables_ipv4.h
+header-test-			+= net/netfilter/nf_tables_ipv6.h
+header-test-			+= net/netfilter/nft_fib.h
+header-test-			+= net/netfilter/nft_meta.h
+header-test-			+= net/netfilter/nft_reject.h
+header-test-			+= net/netns/can.h
+header-test-			+= net/netns/generic.h
+header-test-			+= net/netns/ieee802154_6lowpan.h
+header-test-			+= net/netns/ipv4.h
+header-test-			+= net/netns/ipv6.h
+header-test-			+= net/netns/mpls.h
+header-test-			+= net/netns/nftables.h
+header-test-			+= net/netns/sctp.h
+header-test-			+= net/netrom.h
+header-test-			+= net/p8022.h
+header-test-			+= net/phonet/pep.h
+header-test-			+= net/phonet/phonet.h
+header-test-			+= net/phonet/pn_dev.h
+header-test-			+= net/pptp.h
+header-test-			+= net/psample.h
+header-test-			+= net/psnap.h
+header-test-			+= net/regulatory.h
+header-test-			+= net/rose.h
+header-test-			+= net/sctp/auth.h
+header-test-			+= net/sctp/stream_interleave.h
+header-test-			+= net/sctp/stream_sched.h
+header-test-			+= net/sctp/tsnmap.h
+header-test-			+= net/sctp/ulpevent.h
+header-test-			+= net/sctp/ulpqueue.h
+header-test-			+= net/secure_seq.h
+header-test-			+= net/smc.h
+header-test-			+= net/stp.h
+header-test-			+= net/transp_v6.h
+header-test-			+= net/tun_proto.h
+header-test-			+= net/udplite.h
+header-test-			+= net/xdp.h
+header-test-			+= net/xdp_priv.h
+header-test-			+= pcmcia/cistpl.h
+header-test-			+= pcmcia/ds.h
+header-test-			+= rdma/ib.h
+header-test-			+= rdma/iw_portmap.h
+header-test-			+= rdma/opa_port_info.h
+header-test-			+= rdma/rdma_counter.h
+header-test-			+= rdma/rdmavt_cq.h
+header-test-			+= rdma/restrack.h
+header-test-			+= rdma/signature.h
+header-test-			+= rdma/tid_rdma_defs.h
+header-test-			+= scsi/fc/fc_encaps.h
+header-test-			+= scsi/fc/fc_fc2.h
+header-test-			+= scsi/fc/fc_fcoe.h
+header-test-			+= scsi/fc/fc_fip.h
+header-test-			+= scsi/fc_encode.h
+header-test-			+= scsi/fc_frame.h
+header-test-			+= scsi/iser.h
+header-test-			+= scsi/libfc.h
+header-test-			+= scsi/libfcoe.h
+header-test-			+= scsi/libsas.h
+header-test-			+= scsi/sas_ata.h
+header-test-			+= scsi/scsi_cmnd.h
+header-test-			+= scsi/scsi_dbg.h
+header-test-			+= scsi/scsi_device.h
+header-test-			+= scsi/scsi_dh.h
+header-test-			+= scsi/scsi_eh.h
+header-test-			+= scsi/scsi_host.h
+header-test-			+= scsi/scsi_ioctl.h
+header-test-			+= scsi/scsi_request.h
+header-test-			+= scsi/scsi_tcq.h
+header-test-			+= scsi/scsi_transport.h
+header-test-			+= scsi/scsi_transport_fc.h
+header-test-			+= scsi/scsi_transport_sas.h
+header-test-			+= scsi/scsi_transport_spi.h
+header-test-			+= scsi/scsi_transport_srp.h
+header-test-			+= scsi/scsicam.h
+header-test-			+= scsi/sg.h
+header-test-			+= soc/arc/aux.h
+header-test-			+= soc/arc/mcip.h
+header-test-			+= soc/arc/timers.h
+header-test-			+= soc/brcmstb/common.h
+header-test-			+= soc/fsl/bman.h
+header-test-			+= soc/fsl/qe/qe.h
+header-test-			+= soc/fsl/qe/qe_ic.h
+header-test-			+= soc/fsl/qe/qe_tdm.h
+header-test-			+= soc/fsl/qe/ucc.h
+header-test-			+= soc/fsl/qe/ucc_fast.h
+header-test-			+= soc/fsl/qe/ucc_slow.h
+header-test-			+= soc/fsl/qman.h
+header-test-			+= soc/nps/common.h
+header-test-$(CONFIG_ARC)	+= soc/nps/mtm.h
+header-test-			+= soc/qcom/cmd-db.h
+header-test-			+= soc/qcom/rpmh.h
+header-test-			+= soc/qcom/tcs.h
+header-test-			+= soc/tegra/ahb.h
+header-test-			+= soc/tegra/bpmp-abi.h
+header-test-			+= soc/tegra/common.h
+header-test-			+= soc/tegra/flowctrl.h
+header-test-			+= soc/tegra/fuse.h
+header-test-			+= soc/tegra/mc.h
+header-test-			+= sound/ac97/compat.h
+header-test-			+= sound/aci.h
+header-test-			+= sound/ad1843.h
+header-test-			+= sound/adau1373.h
+header-test-			+= sound/ak4113.h
+header-test-			+= sound/ak4114.h
+header-test-			+= sound/ak4117.h
+header-test-			+= sound/cs35l33.h
+header-test-			+= sound/cs35l34.h
+header-test-			+= sound/cs35l35.h
+header-test-			+= sound/cs35l36.h
+header-test-			+= sound/cs4271.h
+header-test-			+= sound/cs42l52.h
+header-test-			+= sound/cs8427.h
+header-test-			+= sound/da7218.h
+header-test-			+= sound/da7219-aad.h
+header-test-			+= sound/da7219.h
+header-test-			+= sound/da9055.h
+header-test-			+= sound/emu8000.h
+header-test-			+= sound/emux_synth.h
+header-test-			+= sound/hda_component.h
+header-test-			+= sound/hda_hwdep.h
+header-test-			+= sound/hda_i915.h
+header-test-			+= sound/hwdep.h
+header-test-			+= sound/i2c.h
+header-test-			+= sound/l3.h
+header-test-			+= sound/max98088.h
+header-test-			+= sound/max98095.h
+header-test-			+= sound/mixer_oss.h
+header-test-			+= sound/omap-hdmi-audio.h
+header-test-			+= sound/pcm_drm_eld.h
+header-test-			+= sound/pcm_iec958.h
+header-test-			+= sound/pcm_oss.h
+header-test-			+= sound/pxa2xx-lib.h
+header-test-			+= sound/rt286.h
+header-test-			+= sound/rt298.h
+header-test-			+= sound/rt5645.h
+header-test-			+= sound/rt5659.h
+header-test-			+= sound/rt5660.h
+header-test-			+= sound/rt5665.h
+header-test-			+= sound/rt5670.h
+header-test-			+= sound/s3c24xx_uda134x.h
+header-test-			+= sound/seq_device.h
+header-test-			+= sound/seq_kernel.h
+header-test-			+= sound/seq_midi_emul.h
+header-test-			+= sound/seq_oss.h
+header-test-			+= sound/soc-acpi-intel-match.h
+header-test-			+= sound/soc-dai.h
+header-test-			+= sound/soc-dapm.h
+header-test-			+= sound/soc-dpcm.h
+header-test-			+= sound/sof/control.h
+header-test-			+= sound/sof/dai-intel.h
+header-test-			+= sound/sof/dai.h
+header-test-			+= sound/sof/header.h
+header-test-			+= sound/sof/info.h
+header-test-			+= sound/sof/pm.h
+header-test-			+= sound/sof/stream.h
+header-test-			+= sound/sof/topology.h
+header-test-			+= sound/sof/trace.h
+header-test-			+= sound/sof/xtensa.h
+header-test-			+= sound/spear_spdif.h
+header-test-			+= sound/sta32x.h
+header-test-			+= sound/sta350.h
+header-test-			+= sound/tea6330t.h
+header-test-			+= sound/tlv320aic32x4.h
+header-test-			+= sound/tlv320dac33-plat.h
+header-test-			+= sound/uda134x.h
+header-test-			+= sound/wavefront.h
+header-test-			+= sound/wm8903.h
+header-test-			+= sound/wm8904.h
+header-test-			+= sound/wm8960.h
+header-test-			+= sound/wm8962.h
+header-test-			+= sound/wm8993.h
+header-test-			+= sound/wm8996.h
+header-test-			+= sound/wm9081.h
+header-test-			+= sound/wm9090.h
+header-test-			+= target/iscsi/iscsi_target_stat.h
+header-test-			+= trace/bpf_probe.h
+header-test-			+= trace/events/9p.h
+header-test-			+= trace/events/afs.h
+header-test-			+= trace/events/asoc.h
+header-test-			+= trace/events/bcache.h
+header-test-			+= trace/events/block.h
+header-test-			+= trace/events/cachefiles.h
+header-test-			+= trace/events/cgroup.h
+header-test-			+= trace/events/clk.h
+header-test-			+= trace/events/cma.h
+header-test-			+= trace/events/ext4.h
+header-test-			+= trace/events/f2fs.h
+header-test-			+= trace/events/fs_dax.h
+header-test-			+= trace/events/fscache.h
+header-test-			+= trace/events/fsi.h
+header-test-			+= trace/events/fsi_master_ast_cf.h
+header-test-			+= trace/events/fsi_master_gpio.h
+header-test-			+= trace/events/huge_memory.h
+header-test-			+= trace/events/ib_mad.h
+header-test-			+= trace/events/ib_umad.h
+header-test-			+= trace/events/iscsi.h
+header-test-			+= trace/events/jbd2.h
+header-test-			+= trace/events/kvm.h
+header-test-			+= trace/events/kyber.h
+header-test-			+= trace/events/libata.h
+header-test-			+= trace/events/mce.h
+header-test-			+= trace/events/mdio.h
+header-test-			+= trace/events/migrate.h
+header-test-			+= trace/events/mmflags.h
+header-test-			+= trace/events/nbd.h
+header-test-			+= trace/events/nilfs2.h
+header-test-			+= trace/events/pwc.h
+header-test-			+= trace/events/rdma.h
+header-test-			+= trace/events/rpcgss.h
+header-test-			+= trace/events/rpcrdma.h
+header-test-			+= trace/events/rxrpc.h
+header-test-			+= trace/events/scsi.h
+header-test-			+= trace/events/siox.h
+header-test-			+= trace/events/spi.h
+header-test-			+= trace/events/swiotlb.h
+header-test-			+= trace/events/syscalls.h
+header-test-			+= trace/events/target.h
+header-test-			+= trace/events/thermal_power_allocator.h
+header-test-			+= trace/events/timer.h
+header-test-			+= trace/events/wbt.h
+header-test-			+= trace/events/xen.h
+header-test-			+= trace/perf.h
+header-test-			+= trace/trace_events.h
+header-test-			+= uapi/drm/vmwgfx_drm.h
+header-test-			+= uapi/linux/a.out.h
+header-test-			+= uapi/linux/coda.h
+header-test-			+= uapi/linux/coda_psdev.h
+header-test-			+= uapi/linux/errqueue.h
+header-test-			+= uapi/linux/eventpoll.h
+header-test-			+= uapi/linux/hdlc/ioctl.h
+header-test-			+= uapi/linux/input.h
+header-test-			+= uapi/linux/kvm.h
+header-test-			+= uapi/linux/kvm_para.h
+header-test-			+= uapi/linux/lightnvm.h
+header-test-			+= uapi/linux/mic_common.h
+header-test-			+= uapi/linux/mman.h
+header-test-			+= uapi/linux/netfilter/ipset/ip_set_bitmap.h
+header-test-			+= uapi/linux/netfilter/ipset/ip_set_hash.h
+header-test-			+= uapi/linux/netfilter/ipset/ip_set_list.h
+header-test-			+= uapi/linux/netfilter/nf_synproxy.h
+header-test-			+= uapi/linux/netfilter/xt_policy.h
+header-test-			+= uapi/linux/netfilter/xt_set.h
+header-test-			+= uapi/linux/netfilter_arp/arp_tables.h
+header-test-			+= uapi/linux/netfilter_arp/arpt_mangle.h
+header-test-			+= uapi/linux/netfilter_ipv4/ip_tables.h
+header-test-			+= uapi/linux/netfilter_ipv4/ipt_LOG.h
+header-test-			+= uapi/linux/netfilter_ipv6/ip6_tables.h
+header-test-			+= uapi/linux/netfilter_ipv6/ip6t_LOG.h
+header-test-			+= uapi/linux/nilfs2_ondisk.h
+header-test-			+= uapi/linux/patchkey.h
+header-test-			+= uapi/linux/ptrace.h
+header-test-			+= uapi/linux/scc.h
+header-test-			+= uapi/linux/seg6_iptunnel.h
+header-test-			+= uapi/linux/smc_diag.h
+header-test-			+= uapi/linux/timex.h
+header-test-			+= uapi/linux/videodev2.h
+header-test-			+= uapi/scsi/scsi_bsg_fc.h
+header-test-			+= uapi/sound/asound.h
+header-test-			+= uapi/sound/sof/eq.h
+header-test-			+= uapi/sound/sof/fw.h
+header-test-			+= uapi/sound/sof/header.h
+header-test-			+= uapi/sound/sof/manifest.h
+header-test-			+= uapi/sound/sof/trace.h
+header-test-			+= uapi/xen/evtchn.h
+header-test-			+= uapi/xen/gntdev.h
+header-test-			+= uapi/xen/privcmd.h
+header-test-			+= vdso/vsyscall.h
+header-test-			+= video/broadsheetfb.h
+header-test-			+= video/cvisionppc.h
+header-test-			+= video/gbe.h
+header-test-			+= video/kyro.h
+header-test-			+= video/maxinefb.h
+header-test-			+= video/metronomefb.h
+header-test-			+= video/neomagic.h
+header-test-			+= video/of_display_timing.h
+header-test-			+= video/omapvrfb.h
+header-test-			+= video/s1d13xxxfb.h
+header-test-			+= video/sstfb.h
+header-test-			+= video/tgafb.h
+header-test-			+= video/udlfb.h
+header-test-			+= video/uvesafb.h
+header-test-			+= video/vga.h
+header-test-			+= video/w100fb.h
+header-test-			+= xen/acpi.h
+header-test-			+= xen/arm/hypercall.h
+header-test-			+= xen/arm/page-coherent.h
+header-test-			+= xen/arm/page.h
+header-test-			+= xen/balloon.h
+header-test-			+= xen/events.h
+header-test-			+= xen/features.h
+header-test-			+= xen/grant_table.h
+header-test-			+= xen/hvm.h
+header-test-			+= xen/interface/callback.h
+header-test-			+= xen/interface/event_channel.h
+header-test-			+= xen/interface/grant_table.h
+header-test-			+= xen/interface/hvm/dm_op.h
+header-test-			+= xen/interface/hvm/hvm_op.h
+header-test-			+= xen/interface/hvm/hvm_vcpu.h
+header-test-			+= xen/interface/hvm/params.h
+header-test-			+= xen/interface/hvm/start_info.h
+header-test-			+= xen/interface/io/9pfs.h
+header-test-			+= xen/interface/io/blkif.h
+header-test-			+= xen/interface/io/console.h
+header-test-			+= xen/interface/io/displif.h
+header-test-			+= xen/interface/io/fbif.h
+header-test-			+= xen/interface/io/kbdif.h
+header-test-			+= xen/interface/io/netif.h
+header-test-			+= xen/interface/io/pciif.h
+header-test-			+= xen/interface/io/protocols.h
+header-test-			+= xen/interface/io/pvcalls.h
+header-test-			+= xen/interface/io/ring.h
+header-test-			+= xen/interface/io/sndif.h
+header-test-			+= xen/interface/io/tpmif.h
+header-test-			+= xen/interface/io/vscsiif.h
+header-test-			+= xen/interface/io/xs_wire.h
+header-test-			+= xen/interface/memory.h
+header-test-			+= xen/interface/nmi.h
+header-test-			+= xen/interface/physdev.h
+header-test-			+= xen/interface/platform.h
+header-test-			+= xen/interface/sched.h
+header-test-			+= xen/interface/vcpu.h
+header-test-			+= xen/interface/version.h
+header-test-			+= xen/interface/xen-mca.h
+header-test-			+= xen/interface/xen.h
+header-test-			+= xen/interface/xenpmu.h
+header-test-			+= xen/mem-reservation.h
+header-test-			+= xen/page.h
+header-test-			+= xen/platform_pci.h
+header-test-			+= xen/swiotlb-xen.h
+header-test-			+= xen/xen-front-pgdir-shbuf.h
+header-test-			+= xen/xen-ops.h
+header-test-			+= xen/xen.h
+header-test-			+= xen/xenbus.h
+
+# Do not include directly
+header-test- += linux/compiler-clang.h
+header-test- += linux/compiler-gcc.h
+header-test- += linux/patchkey.h
+header-test- += linux/rwlock_api_smp.h
+header-test- += linux/spinlock_types_up.h
+header-test- += linux/spinlock_up.h
+header-test- += linux/wimax/debug.h
+header-test- += rdma/uverbs_named_ioctl.h
+
+# asm-generic/*.h is used by asm/*.h, and should not be included directly
+header-test- += asm-generic/% uapi/asm-generic/%
+
+# Timestamp files touched by Kconfig
+header-test- += config/%
+
+# Timestamp files touched by scripts/adjust_autoksyms.sh
+header-test- += ksym/%
+
+# You could compile-test these, but maybe not so useful...
+header-test- += dt-bindings/%
+
+# Do not test generated headers. Stale headers are often left over when you
+# traverse the git history without cleaning.
+header-test- += generated/%
+
+# The rest are compile-tested
+header-test-pattern-y += */*.h */*/*.h */*/*/*.h */*/*/*/*.h

include/uapi/linux/Kbuild include/uapi/Kbuild

···
 # SPDX-License-Identifier: GPL-2.0
 ifeq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/a.out.h),)
-no-export-headers += a.out.h
+no-export-headers += linux/a.out.h
 endif
 
 ifeq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/kvm.h),)
-no-export-headers += kvm.h
+no-export-headers += linux/kvm.h
 endif
 
 ifeq ($(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/kvm_para.h),)
 ifeq ($(wildcard $(objtree)/arch/$(SRCARCH)/include/generated/uapi/asm/kvm_para.h),)
-no-export-headers += kvm_para.h
+no-export-headers += linux/kvm_para.h
 endif
 endif

init/Kconfig

···
 	int
 	default $(shell,$(srctree)/scripts/clang-version.sh $(CC))
 
+config CC_CAN_LINK
+	def_bool $(success,$(srctree)/scripts/cc-can-link.sh $(CC))
+
 config CC_HAS_ASM_GOTO
 	def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC))
 
···
 	  If you are a developer and want to build everything available, say Y
 	  here. If you are a user/distributor, say N here to exclude useless
 	  drivers to be distributed.
+
+config HEADER_TEST
+	bool "Compile test headers that should be standalone compilable"
+	help
+	  Compile test headers listed in header-test-y target to ensure they are
+	  self-contained, i.e. compilable as standalone units.
+
+	  If you are a developer or tester and want to ensure the requested
+	  headers are self-contained, say Y here. Otherwise, choose N.
+
+config KERNEL_HEADER_TEST
+	bool "Compile test kernel headers"
+	depends on HEADER_TEST
+	help
+	  Headers in include/ are used to build external moduls.
+	  Compile test them to ensure they are self-contained, i.e.
+	  compilable as standalone units.
+
+	  If you are a developer or tester and want to ensure the headers
+	  in include/ are self-contained, say Y here. Otherwise, choose N.
+
+config UAPI_HEADER_TEST
+	bool "Compile test UAPI headers"
+	depends on HEADER_TEST && HEADERS_INSTALL && CC_CAN_LINK
+	help
+	  Compile test headers exported to user-space to ensure they are
+	  self-contained, i.e. compilable as standalone units.
+
+	  If you are a developer or tester and want to ensure the exported
+	  headers are self-contained, say Y here. Otherwise, choose N.
 
 config LOCALVERSION
 	string "Local version - append to kernel release"

kernel/gen_kheaders.sh

···
 # This script generates an archive consisting of kernel headers
 # for CONFIG_IKHEADERS.
 set -e
-spath="$(dirname "$(readlink -f "$0")")"
-kroot="$spath/.."
+sfile="$(readlink -f "$0")"
 outdir="$(pwd)"
 tarfile=$1
 cpio_dir=$outdir/$tarfile.tmp
 
-# Script filename relative to the kernel source root
-# We add it to the archive because it is small and any changes
-# to this script will also cause a rebuild of the archive.
-sfile="$(realpath --relative-to $kroot "$(readlink -f "$0")")"
-
-src_file_list="
-include/
-arch/$SRCARCH/include/
-$sfile
-"
-
-obj_file_list="
+dir_list="
 include/
 arch/$SRCARCH/include/
 "
···
 # Uncomment it for debugging.
 # if [ ! -f /tmp/iter ]; then iter=1; echo 1 > /tmp/iter;
 # else iter=$(($(cat /tmp/iter) + 1)); echo $iter > /tmp/iter; fi
-# find $src_file_list -type f | xargs ls -lR > /tmp/src-ls-$iter
-# find $obj_file_list -type f | xargs ls -lR > /tmp/obj-ls-$iter
+# find $src_file_list -name "*.h" | xargs ls -l > /tmp/src-ls-$iter
+# find $obj_file_list -name "*.h" | xargs ls -l > /tmp/obj-ls-$iter
 
 # include/generated/compile.h is ignored because it is touched even when none
 # of the source files changed. This causes pointless regeneration, so let us
 # ignore them for md5 calculation.
-pushd $kroot > /dev/null
-src_files_md5="$(find $src_file_list -type f                       |
+pushd $srctree > /dev/null
+src_files_md5="$(find $dir_list -name "*.h"			   |
 		grep -v "include/generated/compile.h"		   |
 		grep -v "include/generated/autoconf.h"		   |
-		grep -v "include/config/auto.conf"		   |
-		grep -v "include/config/auto.conf.cmd"		   |
-		grep -v "include/config/tristate.conf"		   |
-		xargs ls -lR | md5sum | cut -d ' ' -f1)"
+		xargs ls -l | md5sum | cut -d ' ' -f1)"
 popd > /dev/null
-obj_files_md5="$(find $obj_file_list -type f                       |
+obj_files_md5="$(find $dir_list -name "*.h"			   |
 		grep -v "include/generated/compile.h"		   |
 		grep -v "include/generated/autoconf.h"		   |
-		grep -v "include/config/auto.conf"                 |
-		grep -v "include/config/auto.conf.cmd"		   |
-		grep -v "include/config/tristate.conf"		   |
-		xargs ls -lR | md5sum | cut -d ' ' -f1)"
-
+		xargs ls -l | md5sum | cut -d ' ' -f1)"
+# Any changes to this script will also cause a rebuild of the archive.
+this_file_md5="$(ls -l $sfile | md5sum | cut -d ' ' -f1)"
 if [ -f $tarfile ]; then tarfile_md5="$(md5sum $tarfile | cut -d ' ' -f1)"; fi
 if [ -f kernel/kheaders.md5 ] &&
 	[ "$(cat kernel/kheaders.md5|head -1)" == "$src_files_md5" ] &&
 	[ "$(cat kernel/kheaders.md5|head -2|tail -1)" == "$obj_files_md5" ] &&
+	[ "$(cat kernel/kheaders.md5|head -3|tail -1)" == "$this_file_md5" ] &&
 	[ "$(cat kernel/kheaders.md5|tail -1)" == "$tarfile_md5" ]; then
 		exit
 fi
···
 rm -rf $cpio_dir
 mkdir $cpio_dir
 
-pushd $kroot > /dev/null
-for f in $src_file_list;
-	do find "$f" ! -name "*.cmd" ! -name ".*";
+pushd $srctree > /dev/null
+for f in $dir_list;
+	do find "$f" -name "*.h";
 done | cpio --quiet -pd $cpio_dir
 popd > /dev/null
 
 # The second CPIO can complain if files already exist which can
 # happen with out of tree builds. Just silence CPIO for now.
-for f in $obj_file_list;
-	do find "$f" ! -name "*.cmd" ! -name ".*";
+for f in $dir_list;
+	do find "$f" -name "*.h";
 done | cpio --quiet -pd $cpio_dir >/dev/null 2>&1
 
 # Remove comments except SDPX lines
···
 
 echo "$src_files_md5" >  kernel/kheaders.md5
 echo "$obj_files_md5" >> kernel/kheaders.md5
+echo "$this_file_md5" >> kernel/kheaders.md5
 echo "$(md5sum $tarfile | cut -d ' ' -f1)" >> kernel/kheaders.md5
 
 rm -rf $cpio_dir

lib/Kconfig.debug

···
 
 	  If unsure, say N.
 
-config HEADERS_CHECK
-	bool "Run 'make headers_check' when building vmlinux"
+config HEADERS_INSTALL
+	bool "Install uapi headers to usr/include"
 	depends on !UML
 	help
-	  This option will extract the user-visible kernel headers whenever
-	  building the kernel, and will run basic sanity checks on them to
-	  ensure that exported files do not attempt to include files which
-	  were not exported, etc.
+	  This option will install uapi headers (headers exported to user-space)
+	  into the usr/include directory for use during the kernel build.
+	  This is unneeded for building the kernel itself, but needed for some
+	  user-space program samples. It is also needed by some features such
+	  as uapi header sanity checks.
+
+config HEADERS_CHECK
+	bool "Run sanity checks on uapi headers when building 'all'"
+	depends on HEADERS_INSTALL
+	help
+	  This option will run basic sanity checks on uapi headers when
+	  building the 'all' target, for example, ensure that they do not
+	  attempt to include files which were not exported, etc.
 
 	  If you're making modifications to header files which are
-	  relevant for userspace, say 'Y', and check the headers
-	  exported to $(INSTALL_HDR_PATH) (usually 'usr/include' in
-	  your build tree), to make sure they're suitable.
+	  relevant for userspace, say 'Y'.
 
 config OPTIMIZE_INLINING
 	bool "Allow compiler to uninline functions marked 'inline'"

lib/raid6/Makefile

···
 
 hostprogs-y	+= mktables
 
-quiet_cmd_unroll = UNROLL  $@
-      cmd_unroll = $(AWK) -f$(srctree)/$(src)/unroll.awk -vN=$(UNROLL) < $< > $@
-
 ifeq ($(CONFIG_ALTIVEC),y)
 altivec_flags := -maltivec $(call cc-option,-mabi=altivec)
 
···
 CFLAGS_REMOVE_altivec1.o  += -msoft-float
 CFLAGS_REMOVE_altivec2.o  += -msoft-float
 CFLAGS_REMOVE_altivec4.o  += -msoft-float
-CFLAGS_REMOVE_altivec8.o  += -msoft-float
 CFLAGS_REMOVE_altivec8.o  += -msoft-float
 CFLAGS_REMOVE_vpermxor1.o += -msoft-float
 CFLAGS_REMOVE_vpermxor2.o += -msoft-float
···
 endif
 endif
 
-targets += int1.c
-$(obj)/int1.c:   UNROLL := 1
-$(obj)/int1.c:   $(src)/int.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
+quiet_cmd_unroll = UNROLL  $@
+      cmd_unroll = $(AWK) -f$(srctree)/$(src)/unroll.awk -vN=$* < $< > $@
 
-targets += int2.c
-$(obj)/int2.c:   UNROLL := 2
-$(obj)/int2.c:   $(src)/int.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
-targets += int4.c
-$(obj)/int4.c:   UNROLL := 4
-$(obj)/int4.c:   $(src)/int.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
-targets += int8.c
-$(obj)/int8.c:   UNROLL := 8
-$(obj)/int8.c:   $(src)/int.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
-targets += int16.c
-$(obj)/int16.c:  UNROLL := 16
-$(obj)/int16.c:  $(src)/int.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
-targets += int32.c
-$(obj)/int32.c:  UNROLL := 32
-$(obj)/int32.c:  $(src)/int.uc $(src)/unroll.awk FORCE
+targets += int1.c int2.c int4.c int8.c int16.c int32.c
+$(obj)/int%.c: $(src)/int.uc $(src)/unroll.awk FORCE
 	$(call if_changed,unroll)
 
 CFLAGS_altivec1.o += $(altivec_flags)
-targets += altivec1.c
-$(obj)/altivec1.c:   UNROLL := 1
-$(obj)/altivec1.c:   $(src)/altivec.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
 CFLAGS_altivec2.o += $(altivec_flags)
-targets += altivec2.c
-$(obj)/altivec2.c:   UNROLL := 2
-$(obj)/altivec2.c:   $(src)/altivec.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
 CFLAGS_altivec4.o += $(altivec_flags)
-targets += altivec4.c
-$(obj)/altivec4.c:   UNROLL := 4
-$(obj)/altivec4.c:   $(src)/altivec.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
 CFLAGS_altivec8.o += $(altivec_flags)
-targets += altivec8.c
-$(obj)/altivec8.c:   UNROLL := 8
-$(obj)/altivec8.c:   $(src)/altivec.uc $(src)/unroll.awk FORCE
+targets += altivec1.c altivec2.c altivec4.c altivec8.c
+$(obj)/altivec%.c: $(src)/altivec.uc $(src)/unroll.awk FORCE
 	$(call if_changed,unroll)
 
 CFLAGS_vpermxor1.o += $(altivec_flags)
-targets += vpermxor1.c
-$(obj)/vpermxor1.c: UNROLL := 1
-$(obj)/vpermxor1.c: $(src)/vpermxor.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
 CFLAGS_vpermxor2.o += $(altivec_flags)
-targets += vpermxor2.c
-$(obj)/vpermxor2.c: UNROLL := 2
-$(obj)/vpermxor2.c: $(src)/vpermxor.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
 CFLAGS_vpermxor4.o += $(altivec_flags)
-targets += vpermxor4.c
-$(obj)/vpermxor4.c: UNROLL := 4
-$(obj)/vpermxor4.c: $(src)/vpermxor.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
 CFLAGS_vpermxor8.o += $(altivec_flags)
-targets += vpermxor8.c
-$(obj)/vpermxor8.c: UNROLL := 8
-$(obj)/vpermxor8.c: $(src)/vpermxor.uc $(src)/unroll.awk FORCE
+targets += vpermxor1.o vpermxor2.o vpermxor4.o vpermxor8.o
+$(obj)/vpermxor%.c: $(src)/vpermxor.uc $(src)/unroll.awk FORCE
 	$(call if_changed,unroll)
 
 CFLAGS_neon1.o += $(NEON_FLAGS)
-targets += neon1.c
-$(obj)/neon1.c:   UNROLL := 1
-$(obj)/neon1.c:   $(src)/neon.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
 CFLAGS_neon2.o += $(NEON_FLAGS)
-targets += neon2.c
-$(obj)/neon2.c:   UNROLL := 2
-$(obj)/neon2.c:   $(src)/neon.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
 CFLAGS_neon4.o += $(NEON_FLAGS)
-targets += neon4.c
-$(obj)/neon4.c:   UNROLL := 4
-$(obj)/neon4.c:   $(src)/neon.uc $(src)/unroll.awk FORCE
-	$(call if_changed,unroll)
-
 CFLAGS_neon8.o += $(NEON_FLAGS)
-targets += neon8.c
-$(obj)/neon8.c:   UNROLL := 8
-$(obj)/neon8.c:   $(src)/neon.uc $(src)/unroll.awk FORCE
+targets += neon1.c neon2.c neon4.c neon8.c
+$(obj)/neon%.c: $(src)/neon.uc $(src)/unroll.awk FORCE
 	$(call if_changed,unroll)
 
 targets += s390vx8.c
-$(obj)/s390vx8.c:   UNROLL := 8
-$(obj)/s390vx8.c:   $(src)/s390vx.uc $(src)/unroll.awk FORCE
+$(obj)/s390vx%.c: $(src)/s390vx.uc $(src)/unroll.awk FORCE
 	$(call if_changed,unroll)
 
 quiet_cmd_mktable = TABLE   $@

net/bpfilter/Kconfig

···
 if BPFILTER
 config BPFILTER_UMH
 	tristate "bpfilter kernel module with user mode helper"
-	depends on $(success,$(srctree)/scripts/cc-can-link.sh $(CC))
+	depends on CC_CAN_LINK
 	default m
 	help
 	  This builds bpfilter kernel module with embedded user mode helper

samples/Kconfig

···
 # SPDX-License-Identifier: GPL-2.0-only
 menuconfig SAMPLES
 	bool "Sample kernel code"
-	depends on !UML
 	help
 	  You can build and test sample kernel code here.
 
···
 
 config SAMPLE_CONNECTOR
 	tristate "Build connector sample -- loadable modules only"
-	depends on CONNECTOR && m
+	depends on CONNECTOR && HEADERS_INSTALL && m
 	help
 	  When enabled, this builds both a sample kernel module for
 	  the connector interface and a user space tool to communicate
 	  with it.
 	  See also Documentation/connector/connector.txt
 
+config SAMPLE_HIDRAW
+	bool "hidraw sample"
+	depends on HEADERS_INSTALL
+
+config SAMPLE_PIDFD
+	bool "pidfd sample"
+	depends on HEADERS_INSTALL
+
 config SAMPLE_SECCOMP
 	bool "Build seccomp sample code"
-	depends on SECCOMP_FILTER
+	depends on SECCOMP_FILTER && HEADERS_INSTALL
 	help
 	  Build samples of seccomp filters using various methods of
 	  BPF filter construction.
···
 
 config SAMPLE_VFS
 	bool "Build example programs that use new VFS system calls"
+	depends on HEADERS_INSTALL
 	help
 	  Build example userspace programs that use new VFS system calls such
 	  as mount API and statx().  Note that this is restricted to the x86

samples/Makefile

···
 obj-$(CONFIG_SAMPLE_ANDROID_BINDERFS)	+= binderfs/
 obj-$(CONFIG_SAMPLE_CONFIGFS)		+= configfs/
 obj-$(CONFIG_SAMPLE_CONNECTOR)		+= connector/
-subdir-y				+= hidraw
+subdir-$(CONFIG_SAMPLE_HIDRAW)		+= hidraw
 obj-$(CONFIG_SAMPLE_HW_BREAKPOINT)	+= hw_breakpoint/
 obj-$(CONFIG_SAMPLE_KDB)		+= kdb/
 obj-$(CONFIG_SAMPLE_KFIFO)		+= kfifo/
 obj-$(CONFIG_SAMPLE_KOBJECT)		+= kobject/
 obj-$(CONFIG_SAMPLE_KPROBES)		+= kprobes/
 obj-$(CONFIG_SAMPLE_LIVEPATCH)		+= livepatch/
-subdir-y				+= pidfd
+subdir-$(CONFIG_SAMPLE_PIDFD)		+= pidfd
 obj-$(CONFIG_SAMPLE_QMI_CLIENT)		+= qmi/
 obj-$(CONFIG_SAMPLE_RPMSG_CLIENT)	+= rpmsg/
 subdir-$(CONFIG_SAMPLE_SECCOMP)		+= seccomp

scripts/Kbuild.include

···
 # would try to directly execute the shell builtin 'command'. This workaround
 # should be kept for a long time since this issue was fixed only after the
 # GNU Make 4.2.1 release.
-cc-cross-prefix = $(firstword $(foreach c, $(filter-out -%, $(1)), \
-			$(if $(shell command -v $(c)gcc 2>/dev/null), $(c))))
+cc-cross-prefix = $(firstword $(foreach c, $(1), \
+			$(if $(shell command -v -- $(c)gcc 2>/dev/null), $(c))))
 
 # output directory for tests below
 TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)
···
 # $(Q)$(MAKE) $(clean)=dir
 clean := -f $(srctree)/scripts/Makefile.clean obj
 
-###
-# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.headersinst obj=
-# Usage:
-# $(Q)$(MAKE) $(hdr-inst)=dir
-hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
-
 # echo command.
 # Short version is used, if $(quiet) equals `quiet_', otherwise full one.
 echo-cmd = $(if $($(quiet)cmd_$(1)),\
···
 # See Documentation/kbuild/makefiles.rst for more info
 
 ifneq ($(KBUILD_NOCMDDEP),1)
-# Check if both arguments are the same including their order. Result is empty
+# Check if both commands are the same including their order. Result is empty
 # string if equal. User may override this check using make KBUILD_NOCMDDEP=1
-arg-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \
+cmd-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \
                          $(subst $(space),$(space_escape),$(strip $(cmd_$1))))
 else
-arg-check = $(if $(strip $(cmd_$@)),,1)
+cmd-check = $(if $(strip $(cmd_$@)),,1)
 endif
 
 # Replace >$< with >$$< to preserve $ when reloading the .cmd file
···
 
 # Find any prerequisites that is newer than target or that does not exist.
 # PHONY targets skipped in both cases.
-any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
+any-prereq = $(filter-out $(PHONY),$?)$(filter-out $(PHONY) $(wildcard $^),$^)
 
 # Execute command if command has changed or prerequisite(s) are updated.
-if_changed = $(if $(strip $(any-prereq) $(arg-check)),                       \
+if_changed = $(if $(any-prereq)$(cmd-check),                                 \
 	$(cmd);                                                              \
 	printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
 
 # Execute the command and also postprocess generated .d dependencies file.
-if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)),$(cmd_and_fixdep),@:)
+if_changed_dep = $(if $(any-prereq)$(cmd-check),$(cmd_and_fixdep),@:)
 
 cmd_and_fixdep =                                                             \
 	$(cmd);                                                              \
···
 # Usage: $(call if_changed_rule,foo)
 # Will check if $(cmd_foo) or any of the prerequisites changed,
 # and if so will execute $(rule_foo).
-if_changed_rule = $(if $(strip $(any-prereq) $(arg-check)),$(rule_$(1)),@:)
+if_changed_rule = $(if $(any-prereq)$(cmd-check),$(rule_$(1)),@:)
 
 ###
 # why - tell why a target got built
···
 why =                                                                        \
     $(if $(filter $@, $(PHONY)),- due to target is PHONY,                    \
         $(if $(wildcard $@),                                                 \
-            $(if $(strip $(any-prereq)),- due to: $(any-prereq),             \
-                $(if $(arg-check),                                           \
+            $(if $(any-prereq),- due to: $(any-prereq),                      \
+                $(if $(cmd-check),                                           \
                     $(if $(cmd_$@),- due to command line change,             \
                         $(if $(filter $@, $(targets)),                       \
                             - due to missing .cmd file,                      \

scripts/Makefile

···
 # The following hostprogs-y programs are only build on demand
 hostprogs-y += unifdef
 
-# These targets are used internally to avoid "is up to date" messages
-PHONY += build_unifdef
-build_unifdef: $(obj)/unifdef
-	@:
-
 subdir-$(CONFIG_GCC_PLUGINS) += gcc-plugins
 subdir-$(CONFIG_MODVERSIONS) += genksyms
 subdir-$(CONFIG_SECURITY_SELINUX) += selinux

scripts/Makefile.build

···
 $(obj)/%.lst: $(src)/%.c FORCE
 	$(call if_changed_dep,cc_lst_c)
 
+# header test (header-test-y target)
+# ---------------------------------------------------------------------------
+
+quiet_cmd_cc_s_h = CC      $@
+      cmd_cc_s_h = $(CC) $(c_flags) -S -o $@ -x c /dev/null -include $<
+
+$(obj)/%.h.s: $(src)/%.h FORCE
+	$(call if_changed_dep,cc_s_h)
+
 # Compile assembler sources (.S)
 # ---------------------------------------------------------------------------
 
···
 
 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
 
-ifneq ($(srctree),.)
+ifdef building_out_of_srctree
 # Create directories for object files if they do not exist
 obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
 # If targets exist, their directories apparently exist. Skip mkdir.

scripts/Makefile.extrawarn

···
 warning-1 += -Wno-missing-field-initializers
 warning-1 += -Wno-sign-compare
 
-warning-2 := -Waggregate-return
 warning-2 += -Wcast-align
 warning-2 += -Wdisabled-optimization
 warning-2 += -Wnested-externs
···
 
 ifdef CONFIG_CC_IS_CLANG
 KBUILD_CFLAGS += -Wno-initializer-overrides
-KBUILD_CFLAGS += -Wno-unused-value
 KBUILD_CFLAGS += -Wno-format
 KBUILD_CFLAGS += -Wno-sign-compare
 KBUILD_CFLAGS += -Wno-format-zero-length
-KBUILD_CFLAGS += -Wno-uninitialized
 endif
 endif

scripts/Makefile.headersinst

···
 
 include scripts/Kbuild.include
 
-srcdir        := $(srctree)/$(obj)
+src := $(srctree)/$(obj)
+gen := $(objtree)/$(subst include/,include/generated/,$(obj))
+dst := usr/include
 
-# When make is run under a fakechroot environment, the function
-# $(wildcard $(srcdir)/*/.) doesn't only return directories, but also regular
-# files. So, we are using a combination of sort/dir/wildcard which works
-# with fakechroot.
-subdirs       := $(patsubst $(srcdir)/%/,%,\
-		 $(filter-out $(srcdir)/,\
-		 $(sort $(dir $(wildcard $(srcdir)/*/)))))
+-include $(src)/Kbuild
 
-# Recursion
-__headers: $(subdirs)
+# $(filter %/, ...) is a workaround for GNU Make <= 4.2.1, where
+# $(wildcard $(src)/*/) contains not only directories but also regular files.
+src-subdirs := $(patsubst $(src)/%/,%,$(filter %/, $(wildcard $(src)/*/)))
+gen-subdirs := $(patsubst $(gen)/%/,%,$(filter %/, $(wildcard $(gen)/*/)))
+all-subdirs := $(sort $(src-subdirs) $(gen-subdirs))
 
-PHONY += $(subdirs)
-$(subdirs):
-	$(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(dst)/$@
+src-headers := $(if $(src-subdirs), $(shell cd $(src) && find $(src-subdirs) -name '*.h'))
+src-headers := $(filter-out $(no-export-headers), $(src-headers))
+gen-headers := $(if $(gen-subdirs), $(shell cd $(gen) && find $(gen-subdirs) -name '*.h'))
+gen-headers := $(filter-out $(no-export-headers), $(gen-headers))
 
-# Skip header install/check for include/uapi and arch/$(SRCARCH)/include/uapi.
-# We have only sub-directories there.
-skip-inst := $(if $(filter %/uapi,$(obj)),1)
+# If the same header is exported from source and generated directories,
+# the former takes precedence, but this should be warned.
+duplicated := $(filter $(gen-headers), $(src-headers))
+$(if $(duplicated), $(warning duplicated header export: $(duplicated)))
 
-ifeq ($(skip-inst),)
+gen-headers := $(filter-out $(duplicated), $(gen-headers))
 
-# Kbuild file is optional
-kbuild-file := $(srctree)/$(obj)/Kbuild
--include $(kbuild-file)
-
-installdir    := $(INSTALL_HDR_PATH)/$(dst)
-gendir        := $(objtree)/$(subst include/,include/generated/,$(obj))
-header-files  := $(notdir $(wildcard $(srcdir)/*.h))
-header-files  := $(filter-out $(no-export-headers), $(header-files))
-genhdr-files  := $(notdir $(wildcard $(gendir)/*.h))
-genhdr-files  := $(filter-out $(header-files), $(genhdr-files))
-
-# files used to track state of install/check
-install-file  := $(installdir)/.install
-check-file    := $(installdir)/.check
-
-# all headers files for this dir
-all-files     := $(header-files) $(genhdr-files)
-output-files  := $(addprefix $(installdir)/, $(all-files))
+# Add dst path prefix
+all-subdirs := $(addprefix $(dst)/, $(all-subdirs))
+src-headers := $(addprefix $(dst)/, $(src-headers))
+gen-headers := $(addprefix $(dst)/, $(gen-headers))
+all-headers := $(src-headers) $(gen-headers)
 
 # Work out what needs to be removed
-oldheaders    := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h))
-unwanted      := $(filter-out $(all-files),$(oldheaders))
+old-subdirs := $(wildcard $(all-subdirs))
+old-headers := $(if $(old-subdirs),$(shell find $(old-subdirs) -name '*.h'))
+unwanted    := $(filter-out $(all-headers), $(old-headers))
 
-# Prefix unwanted with full paths to $(INSTALL_HDR_PATH)
-unwanted-file := $(addprefix $(installdir)/, $(unwanted))
+# Create directories
+existing-dirs := $(sort $(dir $(old-headers)))
+wanted-dirs   := $(sort $(dir $(all-headers)))
+new-dirs      := $(filter-out $(existing-dirs), $(wanted-dirs))
+$(if $(new-dirs), $(shell mkdir -p $(new-dirs)))
 
-printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@))
-
-quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\
-                            file$(if $(word 2, $(all-files)),s))
-      cmd_install = \
-        $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \
-        $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \
-        touch $@
-
-quiet_cmd_remove = REMOVE  $(unwanted)
-      cmd_remove = rm -f $(unwanted-file)
-
-quiet_cmd_check = CHECK   $(printdir) ($(words $(all-files)) files)
-# Headers list can be pretty long, xargs helps to avoid
-# the "Argument list too long" error.
-      cmd_check = for f in $(all-files); do                          \
-                  echo "$(installdir)/$${f}"; done                      \
-                  | xargs                                            \
-                  $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \
-	          touch $@
+# Rules
 
 ifndef HDRCHECK
-# Rules for installing headers
-__headers: $(install-file)
-	@:
 
-targets += $(install-file)
-$(install-file): scripts/headers_install.sh \
-		 $(addprefix $(srcdir)/,$(header-files)) \
-		 $(addprefix $(gendir)/,$(genhdr-files)) FORCE
-	$(if $(unwanted),$(call cmd,remove),)
-	$(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@)))
+quiet_cmd_install = HDRINST $@
+      cmd_install = $(CONFIG_SHELL) $(srctree)/scripts/headers_install.sh $< $@
+
+$(src-headers): $(dst)/%.h: $(src)/%.h $(srctree)/scripts/headers_install.sh FORCE
 	$(call if_changed,install)
 
-else
-__headers: $(check-file)
+$(gen-headers): $(dst)/%.h: $(gen)/%.h $(srctree)/scripts/headers_install.sh FORCE
+	$(call if_changed,install)
+
+quiet_cmd_remove = REMOVE  $(unwanted)
+      cmd_remove = rm -f $(unwanted)
+
+__headers: $(all-headers)
+ifneq ($(unwanted),)
+	$(call cmd,remove)
+endif
 	@:
 
-targets += $(check-file)
-$(check-file): scripts/headers_check.pl $(output-files) FORCE
-	$(call if_changed,check)
+existing-headers := $(filter $(old-headers), $(all-headers))
+
+-include $(foreach f,$(existing-headers),$(dir $(f)).$(notdir $(f)).cmd)
+
+else
+
+quiet_cmd_check = HDRCHK  $<
+      cmd_check = $(PERL) $(srctree)/scripts/headers_check.pl $(dst) $(SRCARCH) $<; touch $@
+
+check-files := $(addsuffix .chk, $(all-headers))
+
+$(check-files): $(dst)/%.chk : $(dst)/% $(srctree)/scripts/headers_check.pl
+	$(call cmd,check)
+
+__headers: $(check-files)
+	@:
 
 endif
-
-cmd_files := $(wildcard \
-             $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
-
-ifneq ($(cmd_files),)
-	include $(cmd_files)
-endif
-
-endif # skip-inst
 
 PHONY += FORCE
-FORCE: ;
+FORCE:
 
 .PHONY: $(PHONY)

scripts/Makefile.host

···
 
 # $(objtree)/$(obj) for including generated headers from checkin source files
 ifeq ($(KBUILD_EXTMOD),)
-ifneq ($(srctree),.)
+ifdef building_out_of_srctree
 _hostc_flags   += -I $(objtree)/$(obj)
 _hostcxx_flags += -I $(objtree)/$(obj)
 endif

scripts/Makefile.lib

···
 extra-$(CONFIG_OF_ALL_DTBS) += $(patsubst %.dtb,%.dt.yaml, $(dtb-))
 endif
 
+# Test self-contained headers
+
+# Wildcard searches in $(srctree)/$(src)/, but not in $(objtree)/$(obj)/.
+# Stale generated headers are often left over, so pattern matching should
+# be avoided. Please notice $(srctree)/$(src)/ and $(objtree)/$(obj) point
+# to the same location for in-tree building. So, header-test-pattern-y should
+# be used with care.
+header-test-y	+= $(filter-out $(header-test-), \
+		$(patsubst $(srctree)/$(src)/%, %, \
+		$(wildcard $(addprefix $(srctree)/$(src)/, \
+		$(header-test-pattern-y)))))
+
+extra-$(CONFIG_HEADER_TEST) += $(addsuffix .s, $(header-test-y))
+
 # Add subdir path
 
 extra-y		:= $(addprefix $(obj)/,$(extra-y))
···
 # $(srctree)/$(src) for including checkin headers from generated source files
 # $(objtree)/$(obj) for including generated headers from checkin source files
 ifeq ($(KBUILD_EXTMOD),)
-ifneq ($(srctree),.)
+ifdef building_out_of_srctree
 _c_flags   += -I $(srctree)/$(src) -I $(objtree)/$(obj)
 _a_flags   += -I $(srctree)/$(src) -I $(objtree)/$(obj)
 _cpp_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
···
 )
 
 quiet_cmd_bzip2 = BZIP2   $@
-      cmd_bzip2 = { cat $(real-prereqs) | bzip2 -9 && $(size_append); } > $@
+      cmd_bzip2 = { cat $(real-prereqs) | bzip2 -9; $(size_append); } > $@
 
 # Lzma
 # ---------------------------------------------------------------------------
 
 quiet_cmd_lzma = LZMA    $@
-      cmd_lzma = { cat $(real-prereqs) | lzma -9 && $(size_append); } > $@
+      cmd_lzma = { cat $(real-prereqs) | lzma -9; $(size_append); } > $@
 
 quiet_cmd_lzo = LZO     $@
-      cmd_lzo = { cat $(real-prereqs) | lzop -9 && $(size_append); } > $@
+      cmd_lzo = { cat $(real-prereqs) | lzop -9; $(size_append); } > $@
 
 quiet_cmd_lz4 = LZ4     $@
-      cmd_lz4 = { cat $(real-prereqs) | lz4c -l -c1 stdin stdout && \
+      cmd_lz4 = { cat $(real-prereqs) | lz4c -l -c1 stdin stdout; \
                   $(size_append); } > $@
 
 # U-Boot mkimage
···
 # big dictionary would increase the memory usage too much in the multi-call
 # decompression mode. A BCJ filter isn't used either.
 quiet_cmd_xzkern = XZKERN  $@
-      cmd_xzkern = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh && \
+      cmd_xzkern = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh; \
                      $(size_append); } > $@
 
 quiet_cmd_xzmisc = XZMISC  $@

scripts/Makefile.modbuiltin

···
 
 include scripts/Kbuild.include
 
-ifneq ($(srctree),.)
+ifdef building_out_of_srctree
 # Create output directory if not already present
 _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
 endif

scripts/basic/fixdep.c

···
 #include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
+#include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <ctype.h>
···
 }
 
 /*
+ * In the intended usage of this program, the stdout is redirected to .*.cmd
+ * files. The return value of printf() and putchar() must be checked to catch
+ * any error, e.g. "No space left on device".
+ */
+static void xprintf(const char *format, ...)
+{
+	va_list ap;
+	int ret;
+
+	va_start(ap, format);
+	ret = vprintf(format, ap);
+	if (ret < 0) {
+		perror("fixdep");
+		exit(1);
+	}
+	va_end(ap);
+}
+
+static void xputchar(int c)
+{
+	int ret;
+
+	ret = putchar(c);
+	if (ret == EOF) {
+		perror("fixdep");
+		exit(1);
+	}
+}
+
+/*
  * Print out a dependency path from a symbol name
  */
 static void print_dep(const char *m, int slen, const char *dir)
 {
 	int c, prev_c = '/', i;
 
-	printf("    $(wildcard %s/", dir);
+	xprintf("    $(wildcard %s/", dir);
 	for (i = 0; i < slen; i++) {
 		c = m[i];
 		if (c == '_')
···
 		else
 			c = tolower(c);
 		if (c != '/' || prev_c != '/')
-			putchar(c);
+			xputchar(c);
 		prev_c = c;
 	}
-	printf(".h) \\\n");
+	xprintf(".h) \\\n");
 }
 
 struct item {
···
 				 */
 				if (!saw_any_target) {
 					saw_any_target = 1;
-					printf("source_%s := %s\n\n",
-					       target, m);
-					printf("deps_%s := \\\n", target);
+					xprintf("source_%s := %s\n\n",
+						target, m);
+					xprintf("deps_%s := \\\n", target);
 				}
 				is_first_dep = 0;
 			} else {
-				printf("  %s \\\n", m);
+				xprintf("  %s \\\n", m);
 			}
 
 			buf = read_file(m);
···
 		exit(1);
 	}
 
-	printf("\n%s: $(deps_%s)\n\n", target, target);
-	printf("$(deps_%s):\n", target);
+	xprintf("\n%s: $(deps_%s)\n\n", target, target);
+	xprintf("$(deps_%s):\n", target);
 }
 
 int main(int argc, char *argv[])
···
 	target = argv[2];
 	cmdline = argv[3];
 
-	printf("cmd_%s := %s\n\n", target, cmdline);
+	xprintf("cmd_%s := %s\n\n", target, cmdline);
 
 	buf = read_file(depfile);
 	parse_dep_file(buf, target);

scripts/coccinelle/api/kstrdup.cocci

···
 p2 << r1.p2;
 @@
 
-cocci.print_main("WARNING opportunity for kstrdep",p1)
+cocci.print_main("WARNING opportunity for kstrdup",p1)
 cocci.print_secs("strcpy",p2)
 
 @script:python depends on org@
···
 p2 << r2.p2;
 @@
 
-cocci.print_main("WARNING opportunity for kstrdep",p1)
+cocci.print_main("WARNING opportunity for kstrdup",p1)
 cocci.print_secs("memcpy",p2)
 
 @script:python depends on report@
···
 p2 << r1.p2;
 @@
 
-msg = "WARNING opportunity for kstrdep (strcpy on line %s)" % (p2[0].line)
+msg = "WARNING opportunity for kstrdup (strcpy on line %s)" % (p2[0].line)
 coccilib.report.print_report(p1[0], msg)
 
 @script:python depends on report@
···
 p2 << r2.p2;
 @@
 
-msg = "WARNING opportunity for kstrdep (memcpy on line %s)" % (p2[0].line)
+msg = "WARNING opportunity for kstrdup (memcpy on line %s)" % (p2[0].line)
 coccilib.report.print_report(p1[0], msg)

scripts/coccinelle/api/stream_open.cocci

···
 // a function that blocks
 @ blocks @
 identifier block_f;
-identifier wait_event =~ "^wait_event_.*";
+identifier wait =~ "^wait_.*";
 @@
   block_f(...) {
     ... when exists
-    wait_event(...)
+    wait(...)
     ... when exists
   }
 
···
 // XXX currently reader_blocks supports only direct and 1-level indirect cases.
 @ reader_blocks_direct @
 identifier stream_reader.readstream;
-identifier wait_event =~ "^wait_event_.*";
+identifier wait =~ "^wait_.*";
 @@
   readstream(...)
   {
     ... when exists
-    wait_event(...)
+    wait(...)
     ... when exists
   }
 

scripts/coccinelle/free/put_device.cocci

···
     when != of_dev_put(id)
     when != if (id) { ... put_device(&id->dev) ... }
     when != e1 = (T)id
-    when != e1 = &id->dev
+    when != e1 = (T)(&id->dev)
     when != e1 = get_device(&id->dev)
     when != e1 = (T1)platform_get_drvdata(id)
 (
···
 p2 << search.p2;
 @@
 
-coccilib.report.print_report(p2[0], "ERROR: missing put_device; "
-			      + "call of_find_device_by_node on line "
-			      + p1[0].line
-			      + ", but without a corresponding object release "
-			      + "within this function.")
+coccilib.report.print_report(p2[0],
+                             "ERROR: missing put_device; call of_find_device_by_node on line "
+                             + p1[0].line
+                             + ", but without a corresponding object release within this function.")
 
 @script:python depends on org@
 p1 << search.p1;

scripts/gdb/linux/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
 
-ifneq ($(srctree),.)
+ifdef building_out_of_srctree
 
 symlinks := $(patsubst $(srctree)/$(src)/%,%,$(wildcard $(srctree)/$(src)/*.py))
 

scripts/genksyms/keywords.c

···
 	{ "__volatile__", VOLATILE_KEYW },
 	{ "__builtin_va_list", VA_LIST_KEYW },
 
+	{ "__int128", BUILTIN_INT_KEYW },
+	{ "__int128_t", BUILTIN_INT_KEYW },
+	{ "__uint128_t", BUILTIN_INT_KEYW },
+
 	// According to rth, c99 defines "_Bool", __restrict", __restrict__", "restrict".  KAO
 	{ "_Bool", BOOL_KEYW },
 	{ "_restrict", RESTRICT_KEYW },

scripts/genksyms/parse.y

···
 %token ATTRIBUTE_KEYW
 %token AUTO_KEYW
 %token BOOL_KEYW
+%token BUILTIN_INT_KEYW
 %token CHAR_KEYW
 %token CONST_KEYW
 %token DOUBLE_KEYW
···
 	| VOID_KEYW
 	| BOOL_KEYW
 	| VA_LIST_KEYW
+	| BUILTIN_INT_KEYW
 	| TYPE			{ (*$1)->tag = SYM_TYPEDEF; $$ = $1; }
 	;
 

scripts/headers.sh

···
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-# Run headers_$1 command for all suitable architectures
-
-# Stop on error
-set -e
-
-do_command()
-{
-	if [ -f ${srctree}/arch/$2/include/asm/Kbuild ]; then
-		make ARCH=$2 KBUILD_HEADERS=$1 headers_$1
-	else
-		printf "Ignoring arch: %s\n" ${arch}
-	fi
-}
-
-archs=${HDR_ARCH_LIST:-$(ls ${srctree}/arch)}
-
-for arch in ${archs}; do
-	case ${arch} in
-	um)        # no userspace export
-		;;
-	*)
-		if [ -d ${srctree}/arch/${arch} ]; then
-			do_command $1 ${arch}
-		fi
-		;;
-	esac
-done

scripts/headers_install.sh

···
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 
-if [ $# -lt 2 ]
+if [ $# -ne 2 ]
 then
-	echo "Usage: headers_install.sh OUTDIR SRCDIR [FILES...]"
+	echo "Usage: headers_install.sh INFILE OUTFILE"
 	echo
 	echo "Prepares kernel header files for use by user space, by removing"
 	echo "all compiler.h definitions and #includes, removing any"
 	echo "#ifdef __KERNEL__ sections, and putting __underscores__ around"
 	echo "asm/inline/volatile keywords."
 	echo
-	echo "OUTDIR: directory to write each userspace header FILE to."
-	echo "SRCDIR: source directory where files are picked."
-	echo "FILES:  list of header files to operate on."
+	echo "INFILE: header file to operate on"
+	echo "OUTFILE: output file which the processed header is writen to"
 
 	exit 1
 fi
 
 # Grab arguments
+INFILE=$1
+OUTFILE=$2
+TMPFILE=$OUTFILE.tmp
 
-OUTDIR="$1"
-shift
-SRCDIR="$1"
-shift
+trap 'rm -f $OUTFILE $TMPFILE' EXIT
 
-# Iterate through files listed on command line
+sed -E -e '
+	s/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g
+	s/__attribute_const__([[:space:]]|$)/\1/g
+	s@^#include <linux/compiler(|_types).h>@@
+	s/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g
+	s/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g
+	s@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @
+' $INFILE > $TMPFILE || exit 1
 
-FILE=
-trap 'rm -f "$OUTDIR/$FILE" "$OUTDIR/$FILE.sed"' EXIT
-for i in "$@"
-do
-	FILE="$(basename "$i")"
-	sed -E \
-		-e 's/([[:space:](])(__user|__force|__iomem)[[:space:]]/\1/g' \
-		-e 's/__attribute_const__([[:space:]]|$)/\1/g' \
-		-e 's@^#include <linux/compiler(|_types).h>@@' \
-		-e 's/(^|[^a-zA-Z0-9])__packed([^a-zA-Z0-9_]|$)/\1__attribute__((packed))\2/g' \
-		-e 's/(^|[[:space:](])(inline|asm|volatile)([[:space:](]|$)/\1__\2__\3/g' \
-		-e 's@#(ifndef|define|endif[[:space:]]*/[*])[[:space:]]*_UAPI@#\1 @' \
-		"$SRCDIR/$i" > "$OUTDIR/$FILE.sed" || exit 1
-	scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ "$OUTDIR/$FILE.sed" \
-		> "$OUTDIR/$FILE"
-	[ $? -gt 1 ] && exit 1
-	rm -f "$OUTDIR/$FILE.sed"
-done
+scripts/unifdef -U__KERNEL__ -D__EXPORTED_HEADERS__ $TMPFILE > $OUTFILE
+[ $? -gt 1 ] && exit 1
+
+rm -f $TMPFILE
 trap - EXIT

scripts/kallsyms.c

···
 	/* exclude debugging symbols */
 	else if (stype == 'N' || stype == 'n')
 		return -1;
+	/* exclude s390 kasan local symbols */
+	else if (!strncmp(sym, ".LASANPC", 8))
+		return -1;
 
 	/* include the type field in the symbol name, so that it gets
 	 * compressed together */

scripts/package/builddeb

···
 fi
 
 if [ "$ARCH" != "um" ]; then
-	$MAKE -f $srctree/Makefile headers_check
+	$MAKE -f $srctree/Makefile headers
 	$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH="$libc_headers_dir/usr"
 fi
 

scripts/package/mkspec

···
 __KERNELRELEASE=$(echo $KERNELRELEASE | sed -e "s/-/_/g")
 EXCLUDES="$RCS_TAR_IGNORE --exclude=.tmp_versions --exclude=*vmlinux* \
 --exclude=*.o --exclude=*.ko --exclude=*.cmd --exclude=Documentation \
---exclude=.config.old --exclude=.missing-syscalls.d"
+--exclude=.config.old --exclude=.missing-syscalls.d --exclude=*.s"
 
 # We can label the here-doc lines for conditional output to the spec file
 #

scripts/tags.sh

···
 # mode may be any of: tags, TAGS, cscope
 #
 # Uses the following environment variables:
-# ARCH, SUBARCH, SRCARCH, srctree, src, obj
+# SUBARCH, SRCARCH, srctree
 
 if [ "$KBUILD_VERBOSE" = "1" ]; then
 	set -x
···
 # tags and cscope files should also ignore MODVERSION *.mod.c files
 ignore="$ignore ( -name *.mod.c ) -prune -o"
 
-# Do not use full path if we do not use O=.. builds
-# Use make O=. {tags|cscope}
+# Use make KBUILD_ABS_SRCTREE=1 {tags|cscope}
 # to force full paths for a non-O= build
 if [ "${srctree}" = "." -o -z "${srctree}" ]; then
 	tree=
···
 	ALLSOURCE_ARCHS=$(find ${tree}arch/ -mindepth 1 -maxdepth 1 -type d -printf '%f ')
 fi
 
-# find sources in arch/$ARCH
+# find sources in arch/$1
 find_arch_sources()
 {
 	for i in $archincludedir; do
 		prune="$prune -wholename $i -prune -o"
 	done
-	find ${tree}arch/$1 $ignore $subarchprune $prune -name "$2" \
-		-not -type l -print;
+	find ${tree}arch/$1 $ignore $prune -name "$2" -not -type l -print;
 }
 
 # find sources in arch/$1/include
 find_arch_include_sources()
 {
-	include=$(find ${tree}arch/$1/ $subarchprune \
-					-name include -type d -print);
+	include=$(find ${tree}arch/$1/ -name include -type d -print);
 	if [ -n "$include" ]; then
 		archincludedir="$archincludedir $include"
 		find $include $ignore -name "$2" -not -type l -print;
···
 	else
 		archinclude=${SUBARCH}
 	fi
-elif [ "${SRCARCH}" = "arm" -a "${SUBARCH}" != "" ]; then
-	subarchdir=$(find ${tree}arch/$SRCARCH/ -name "mach-*" -type d -o \
-							-name "plat-*" -type d);
-	mach_suffix=$SUBARCH
-	plat_suffix=$SUBARCH
-
-	# Special cases when $plat_suffix != $mach_suffix
-	case $mach_suffix in
-		"omap1" | "omap2")
-			plat_suffix="omap"
-			;;
-	esac
-
-	if [ ! -d ${tree}arch/$SRCARCH/mach-$mach_suffix ]; then
-		echo "Warning: arch/arm/mach-$mach_suffix/ not found." >&2
-		echo "         Fix your \$SUBARCH appropriately" >&2
-	fi
-
-	for i in $subarchdir; do
-		case "$i" in
-			*"mach-"${mach_suffix})
-				;;
-			*"plat-"${plat_suffix})
-				;;
-			*)
-				subarchprune="$subarchprune \
-						-wholename $i -prune -o"
-				;;
-		esac
-	done
 fi
 
 remove_structs=

tools/testing/selftests/Makefile

···
 # Append kselftest to KBUILD_OUTPUT to avoid cluttering
 # KBUILD_OUTPUT with selftest objects and headers installed
 # by selftests Makefile or lib.mk.
-ifneq ($(KBUILD_SRC),)
+ifdef building_out_of_srctree
 override LDFLAGS =
 endif
 

tools/testing/selftests/lib.mk

···
 endef
 
 run_tests: all
-ifneq ($(KBUILD_SRC),)
+ifdef building_out_of_srctree
 	@if [ "X$(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES)" != "X" ]; then
 		@rsync -aq $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT)
 	fi
···
 # When make O= with kselftest target from main level
 # the following aren't defined.
 #
-ifneq ($(KBUILD_SRC),)
+ifdef building_out_of_srctree
 LINK.c = $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)
 COMPILE.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c
 LINK.S = $(CC) $(ASFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH)

usr/.gitignore

···
 initramfs_data.cpio.bz2
 initramfs_data.cpio.lzma
 initramfs_list
-include

usr/Makefile

···
 $(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
 	$(Q)$(initramfs) -l $(ramfs-input) > $(obj)/$(datafile_d_y)
 	$(call if_changed,initfs)
+
+subdir-$(CONFIG_UAPI_HEADER_TEST) += include

usr/include/.gitignore

···
+*
+!.gitignore
+!Makefile

usr/include/Makefile

···
+# SPDX-License-Identifier: GPL-2.0-only
+
+# Unlike the kernel space, exported headers are written in standard C.
+#  - Forbid C++ style comments
+#  - Use '__inline__', '__asm__' instead of 'inline', 'asm'
+#
+# -std=c90 (equivalent to -ansi) catches the violation of those.
+# We cannot go as far as adding -Wpedantic since it emits too many warnings.
+UAPI_CFLAGS := -std=c90 -Wall -Werror=implicit-function-declaration
+
+override c_flags = $(UAPI_CFLAGS) -Wp,-MD,$(depfile) -I$(objtree)/usr/include
+
+# The following are excluded for now because they fail to build.
+#
+# Do not add a new header to the blacklist without legitimate reason.
+# Please consider to fix the header first.
+#
+# Sorted alphabetically.
+header-test- += asm/ipcbuf.h
+header-test- += asm/msgbuf.h
+header-test- += asm/sembuf.h
+header-test- += asm/shmbuf.h
+header-test- += asm/signal.h
+header-test- += asm/ucontext.h
+header-test- += drm/vmwgfx_drm.h
+header-test- += linux/am437x-vpfe.h
+header-test- += linux/android/binder.h
+header-test- += linux/android/binderfs.h
+header-test-$(CONFIG_CPU_BIG_ENDIAN) += linux/byteorder/big_endian.h
+header-test-$(CONFIG_CPU_LITTLE_ENDIAN) += linux/byteorder/little_endian.h
+header-test- += linux/coda.h
+header-test- += linux/coda_psdev.h
+header-test- += linux/dvb/audio.h
+header-test- += linux/dvb/osd.h
+header-test- += linux/elfcore.h
+header-test- += linux/errqueue.h
+header-test- += linux/fsmap.h
+header-test- += linux/hdlc/ioctl.h
+header-test- += linux/ivtv.h
+header-test- += linux/jffs2.h
+header-test- += linux/kexec.h
+header-test- += linux/matroxfb.h
+header-test- += linux/netfilter_bridge/ebtables.h
+header-test- += linux/netfilter_ipv4/ipt_LOG.h
+header-test- += linux/netfilter_ipv6/ip6t_LOG.h
+header-test- += linux/nfc.h
+header-test- += linux/nilfs2_ondisk.h
+header-test- += linux/omap3isp.h
+header-test- += linux/omapfb.h
+header-test- += linux/patchkey.h
+header-test- += linux/phonet.h
+header-test- += linux/reiserfs_xattr.h
+header-test- += linux/scc.h
+header-test- += linux/sctp.h
+header-test- += linux/signal.h
+header-test- += linux/sysctl.h
+header-test- += linux/usb/audio.h
+header-test- += linux/v4l2-mediabus.h
+header-test- += linux/v4l2-subdev.h
+header-test- += linux/videodev2.h
+header-test- += linux/vm_sockets.h
+header-test- += misc/ocxl.h
+header-test- += mtd/mtd-abi.h
+header-test- += mtd/mtd-user.h
+header-test- += scsi/scsi_bsg_fc.h
+header-test- += scsi/scsi_netlink.h
+header-test- += scsi/scsi_netlink_fc.h
+header-test- += sound/asequencer.h
+header-test- += sound/asoc.h
+header-test- += sound/asound.h
+header-test- += sound/compress_offload.h
+header-test- += sound/emu10k1.h
+header-test- += sound/sfnt_info.h
+header-test- += sound/sof/eq.h
+header-test- += sound/sof/fw.h
+header-test- += sound/sof/header.h
+header-test- += sound/sof/manifest.h
+header-test- += sound/sof/trace.h
+header-test- += xen/evtchn.h
+header-test- += xen/gntdev.h
+header-test- += xen/privcmd.h
+
+# More headers are broken in some architectures
+
+ifeq ($(SRCARCH),arc)
+header-test- += linux/bpf_perf_event.h
+endif
+
+ifeq ($(SRCARCH),ia64)
+header-test- += asm/setup.h
+header-test- += asm/sigcontext.h
+header-test- += asm/perfmon.h
+header-test- += asm/perfmon_default_smpl.h
+header-test- += linux/if_bonding.h
+endif
+
+ifeq ($(SRCARCH),mips)
+header-test- += asm/stat.h
+endif
+
+ifeq ($(SRCARCH),powerpc)
+header-test- += asm/stat.h
+header-test- += linux/bpf_perf_event.h
+endif
+
+ifeq ($(SRCARCH),riscv)
+header-test- += linux/bpf_perf_event.h
+endif
+
+ifeq ($(SRCARCH),s390)
+header-test- += asm/runtime_instr.h
+header-test- += asm/zcrypt.h
+endif
+
+ifeq ($(SRCARCH),sparc)
+header-test- += asm/stat.h
+header-test- += asm/uctx.h
+header-test- += asm/fbio.h
+header-test- += asm/openpromio.h
+endif
+
+# asm-generic/*.h is used by asm/*.h, and should not be included directly
+header-test- += asm-generic/%
+
+# The rest are compile-tested
+header-test-y += $(filter-out $(header-test-), \
+			$(patsubst $(obj)/%,%, $(wildcard \
+			$(addprefix $(obj)/, *.h */*.h */*/*.h */*/*/*.h))))
+
+# For GNU Make <= 4.2.1, $(wildcard $(obj)/*/) matches to not only directories
+# but also regular files. Use $(filter %/, ...) just in case.
+clean-dirs += $(patsubst $(obj)/%/,%,$(filter %/, $(wildcard $(obj)/*/)))