Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

1 files changed, 2075 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 000000000..b479ccfc7
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,2075 @@
+# SPDX-License-Identifier: GPL-2.0
+VERSION = 5
+PATCHLEVEL = 10
+SUBLEVEL = 110
+EXTRAVERSION =
+NAME = Dare mighty things
+
+# *DOCUMENTATION*
+# To see a list of typical targets execute "make help"
+# More info can be located in ./README
+# Comments in this file are targeted only to the developer, do not
+# expect to learn how to build the kernel reading this file.
+
+$(if $(filter __%, $(MAKECMDGOALS)), \
+	$(error targets prefixed with '__' are only for internal use))
+
+# That's our default target when none is given on the command line
+PHONY := __all
+__all:
+
+# We are using a recursive build, so we need to do a little thinking
+# to get the ordering right.
+#
+# Most importantly: sub-Makefiles should only ever modify files in
+# their own directory. If in some directory we have a dependency on
+# a file in another dir (which doesn't happen often, but it's often
+# unavoidable when linking the built-in.a targets which finally
+# turn into vmlinux), we will call a sub make in that other dir, and
+# after that we are sure that everything which is in that other dir
+# is now up to date.
+#
+# The only cases where we need to modify files which have global
+# effects are thus separated out and done before the recursive
+# descending is started. They are now explicitly listed as the
+# prepare rule.
+
+ifneq ($(sub_make_done),1)
+
+# Do not use make's built-in rules and variables
+# (this increases performance and avoids hard-to-debug behaviour)
+MAKEFLAGS += -rR
+
+# Avoid funny character set dependencies
+unexport LC_ALL
+LC_COLLATE=C
+LC_NUMERIC=C
+export LC_COLLATE LC_NUMERIC
+
+# Avoid interference with shell env settings
+unexport GREP_OPTIONS
+
+# Beautify output
+# ---------------------------------------------------------------------------
+#
+# Normally, we echo the whole command before executing it. By making
+# that echo $($(quiet)$(cmd)), we now have the possibility to set
+# $(quiet) to choose other forms of output instead, e.g.
+#
+#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
+#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
+#
+# If $(quiet) is empty, the whole command will be printed.
+# If it is set to "quiet_", only the short version will be printed.
+# If it is set to "silent_", nothing will be printed at all, since
+# the variable $(silent_cmd_cc_o_c) doesn't exist.
+#
+# A simple variant is to prefix commands with $(Q) - that's useful
+# for commands that shall be hidden in non-verbose mode.
+#
+#	$(Q)ln $@ :<
+#
+# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
+# If KBUILD_VERBOSE equals 1 then the above command is displayed.
+# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
+#
+# To put more focus on warnings, be less verbose as default
+# Use 'make V=1' to see the full commands
+
+ifeq ("$(origin V)", "command line")
+  KBUILD_VERBOSE = $(V)
+endif
+ifndef KBUILD_VERBOSE
+  KBUILD_VERBOSE = 0
+endif
+
+ifeq ($(KBUILD_VERBOSE),1)
+  quiet =
+  Q =
+else
+  quiet=quiet_
+  Q = @
+endif
+
+# If the user is running make -s (silent mode), suppress echoing of
+# commands
+
+ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
+  quiet=silent_
+endif
+
+export quiet Q KBUILD_VERBOSE
+
+# Kbuild will save output files in the current working directory.
+# This does not need to match to the root of the kernel source tree.
+#
+# For example, you can do this:
+#
+#  cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
+#
+# If you want to save output files in a different location, there are
+# two syntaxes to specify it.
+#
+# 1) O=
+# Use "make O=dir/to/store/output/files/"
+#
+# 2) Set KBUILD_OUTPUT
+# Set the environment variable KBUILD_OUTPUT to point to the output directory.
+# export KBUILD_OUTPUT=dir/to/store/output/files/; make
+#
+# The O= assignment takes precedence over the KBUILD_OUTPUT environment
+# variable.
+
+# Do we want to change the working directory?
+ifeq ("$(origin O)", "command line")
+  KBUILD_OUTPUT := $(O)
+endif
+
+ifneq ($(KBUILD_OUTPUT),)
+# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
+# expand a shell special character '~'. We use a somewhat tedious way here.
+abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
+$(if $(abs_objtree),, \
+     $(error failed to create output directory "$(KBUILD_OUTPUT)"))
+
+# $(realpath ...) resolves symlinks
+abs_objtree := $(realpath $(abs_objtree))
+else
+abs_objtree := $(CURDIR)
+endif # ifneq ($(KBUILD_OUTPUT),)
+
+ifeq ($(abs_objtree),$(CURDIR))
+# Suppress "Entering directory ..." unless we are changing the work directory.
+MAKEFLAGS += --no-print-directory
+else
+need-sub-make := 1
+endif
+
+abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
+
+ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
+$(error source directory cannot contain spaces or colons)
+endif
+
+ifneq ($(abs_srctree),$(abs_objtree))
+# Look for make include files relative to root of kernel src
+#
+# This does not become effective immediately because MAKEFLAGS is re-parsed
+# once after the Makefile is read. We need to invoke sub-make.
+MAKEFLAGS += --include-dir=$(abs_srctree)
+need-sub-make := 1
+endif
+
+this-makefile := $(lastword $(MAKEFILE_LIST))
+
+ifneq ($(filter 3.%,$(MAKE_VERSION)),)
+# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
+# We need to invoke sub-make to avoid implicit rules in the top Makefile.
+need-sub-make := 1
+# Cancel implicit rules for this Makefile.
+$(this-makefile): ;
+endif
+
+export abs_srctree abs_objtree
+export sub_make_done := 1
+
+ifeq ($(need-sub-make),1)
+
+PHONY += $(MAKECMDGOALS) __sub-make
+
+$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
+	@:
+
+# Invoke a second make in the output directory, passing relevant variables
+__sub-make:
+	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
+
+endif # need-sub-make
+endif # sub_make_done
+
+# We process the rest of the Makefile if this is the final invocation of make
+ifeq ($(need-sub-make),)
+
+# Do not print "Entering directory ...",
+# but we want to display it when entering to the output directory
+# so that IDEs/editors are able to understand relative filenames.
+MAKEFLAGS += --no-print-directory
+
+# Call a source code checker (by default, "sparse") as part of the
+# C compilation.
+#
+# Use 'make C=1' to enable checking of only re-compiled files.
+# Use 'make C=2' to enable checking of *all* source files, regardless
+# of whether they are re-compiled or not.
+#
+# See the file "Documentation/dev-tools/sparse.rst" for more details,
+# including where to get the "sparse" utility.
+
+ifeq ("$(origin C)", "command line")
+  KBUILD_CHECKSRC = $(C)
+endif
+ifndef KBUILD_CHECKSRC
+  KBUILD_CHECKSRC = 0
+endif
+
+# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
+# directory of external module to build. Setting M= takes precedence.
+ifeq ("$(origin M)", "command line")
+  KBUILD_EXTMOD := $(M)
+endif
+
+$(if $(word 2, $(KBUILD_EXTMOD)), \
+	$(error building multiple external modules is not supported))
+
+export KBUILD_CHECKSRC KBUILD_EXTMOD
+
+extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
+
+# ANDROID: set up mixed-build support. mixed-build allows device kernel modules
+# to be compiled against a GKI kernel. This approach still uses the headers and
+# Kbuild from device kernel, so care must be taken to ensure that those headers match.
+ifdef KBUILD_MIXED_TREE
+# Need vmlinux.symvers for modpost and System.map for depmod, check whether they exist in KBUILD_MIXED_TREE
+required_mixed_files=vmlinux.symvers System.map
+$(if $(filter-out $(words $(required_mixed_files)), \
+		$(words $(wildcard $(add-prefix $(KBUILD_MIXED_TREE)/,$(required_mixed_files))))),,\
+	$(error KBUILD_MIXED_TREE=$(KBUILD_MIXED_TREE) doesn't contain $(required_mixed_files)))
+endif
+
+mixed-build-prefix = $(if $(KBUILD_MIXED_TREE),$(KBUILD_MIXED_TREE)/)
+export KBUILD_MIXED_TREE
+
+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
+                srctree := ..
+        else
+                srctree := $(abs_srctree)
+        endif
+	building_out_of_srctree := 1
+endif
+
+ifneq ($(KBUILD_ABS_SRCTREE),)
+srctree := $(abs_srctree)
+endif
+
+objtree		:= .
+VPATH		:= $(srctree)
+
+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
+# It is allowed to specify more targets when calling make, including
+# mixing *config targets and build targets.
+# For example 'make oldconfig all'.
+# Detect when mixed targets is specified, and make a second invocation
+# of make so .config is not included in this case either (for *config).
+
+version_h := include/generated/uapi/linux/version.h
+old_version_h := include/linux/version.h
+
+clean-targets := %clean mrproper cleandocs
+no-dot-config-targets := $(clean-targets) \
+			 cscope gtags TAGS tags help% %docs check% coccicheck \
+			 $(version_h) headers headers_% archheaders archscripts \
+			 %asm-generic kernelversion %src-pkg dt_binding_check \
+			 outputmakefile
+no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
+			  image_name
+single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
+
+config-build	:=
+mixed-build	:=
+need-config	:= 1
+may-sync-config	:= 1
+single-build	:=
+
+ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
+	ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
+		need-config :=
+	endif
+endif
+
+ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
+	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
+		may-sync-config :=
+	endif
+endif
+
+ifneq ($(KBUILD_EXTMOD),)
+	may-sync-config :=
+endif
+
+ifeq ($(KBUILD_EXTMOD),)
+        ifneq ($(filter %config,$(MAKECMDGOALS)),)
+		config-build := 1
+                ifneq ($(words $(MAKECMDGOALS)),1)
+			mixed-build := 1
+                endif
+        endif
+endif
+
+# We cannot build single targets and the others at the same time
+ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
+	single-build := 1
+	ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
+		mixed-build := 1
+	endif
+endif
+
+# For "make -j clean all", "make -j mrproper defconfig all", etc.
+ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
+        ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
+		mixed-build := 1
+        endif
+endif
+
+# install and modules_install need also be processed one by one
+ifneq ($(filter install,$(MAKECMDGOALS)),)
+        ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
+		mixed-build := 1
+        endif
+endif
+
+ifdef mixed-build
+# ===========================================================================
+# We're called with mixed targets (*config and build targets).
+# Handle them one by one.
+
+PHONY += $(MAKECMDGOALS) __build_one_by_one
+
+$(MAKECMDGOALS): __build_one_by_one
+	@:
+
+__build_one_by_one:
+	$(Q)set -e; \
+	for i in $(MAKECMDGOALS); do \
+		$(MAKE) -f $(srctree)/Makefile $$i; \
+	done
+
+else # !mixed-build
+
+include scripts/Kbuild.include
+
+# Read KERNELRELEASE from include/config/kernel.release (if it exists)
+KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
+KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
+export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
+
+include scripts/subarch.include
+
+# Cross compiling and selecting different set of gcc/bin-utils
+# ---------------------------------------------------------------------------
+#
+# When performing cross compilation for other architectures ARCH shall be set
+# to the target architecture. (See arch/* for the possibilities).
+# ARCH can be set during invocation of make:
+# make ARCH=ia64
+# Another way is to have ARCH set in the environment.
+# The default ARCH is the host where make is executed.
+
+# CROSS_COMPILE specify the prefix used for all executables used
+# during compilation. Only gcc and related bin-utils executables
+# are prefixed with $(CROSS_COMPILE).
+# CROSS_COMPILE can be set on the command line
+# make CROSS_COMPILE=ia64-linux-
+# Alternatively CROSS_COMPILE can be set in the environment.
+# Default value for CROSS_COMPILE is not to prefix executables
+# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
+ARCH		?= $(SUBARCH)
+
+# Architecture as present in compile.h
+UTS_MACHINE 	:= $(ARCH)
+SRCARCH 	:= $(ARCH)
+
+# Additional ARCH settings for x86
+ifeq ($(ARCH),i386)
+        SRCARCH := x86
+endif
+ifeq ($(ARCH),x86_64)
+        SRCARCH := x86
+endif
+
+# Additional ARCH settings for sparc
+ifeq ($(ARCH),sparc32)
+       SRCARCH := sparc
+endif
+ifeq ($(ARCH),sparc64)
+       SRCARCH := sparc
+endif
+
+# Additional ARCH settings for sh
+ifeq ($(ARCH),sh64)
+       SRCARCH := sh
+endif
+
+KCONFIG_CONFIG	?= .config
+export KCONFIG_CONFIG
+
+# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
+export KBUILD_DEFCONFIG := defconfig
+
+# SHELL used by kbuild
+CONFIG_SHELL := sh
+
+HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
+HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
+HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
+
+ifneq ($(LLVM),)
+HOSTCC	= clang
+HOSTCXX	= clang++
+else
+HOSTCC	= gcc
+HOSTCXX	= g++
+endif
+
+KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
+			 -O2 -fomit-frame-pointer -std=gnu89
+KBUILD_USERCFLAGS  := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS)
+KBUILD_USERLDFLAGS := $(USERLDFLAGS)
+
+KBUILD_HOSTCFLAGS   := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
+KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
+KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
+KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
+
+# Make variables (CC, etc...)
+CPP		= $(CC) -E
+ifneq ($(LLVM),)
+CC		= clang
+LD		= ld.lld
+AR		= llvm-ar
+NM		= llvm-nm
+OBJCOPY		= llvm-objcopy
+OBJDUMP		= llvm-objdump
+READELF		= llvm-readelf
+STRIP		= llvm-strip
+else
+CC		= $(CROSS_COMPILE)gcc
+LD		= $(CROSS_COMPILE)ld
+AR		= $(CROSS_COMPILE)ar
+NM		= $(CROSS_COMPILE)nm
+OBJCOPY		= $(CROSS_COMPILE)objcopy
+OBJDUMP		= $(CROSS_COMPILE)objdump
+READELF		= $(CROSS_COMPILE)readelf
+STRIP		= $(CROSS_COMPILE)strip
+endif
+PAHOLE		= pahole
+RESOLVE_BTFIDS	= $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
+LEX		= flex
+YACC		= bison
+AWK		= awk
+INSTALLKERNEL  := installkernel
+DEPMOD		= depmod
+PERL		= perl
+PYTHON		= python
+PYTHON3		= python3
+CHECK		= sparse
+BASH		= bash
+KGZIP		= gzip
+KBZIP2		= bzip2
+KLZOP		= lzop
+LZMA		= lzma
+LZ4		= lz4
+XZ		= xz
+ZSTD		= zstd
+
+# Use the wrapper for the compiler. This wrapper scans for new
+# warnings and causes the build to stop upon encountering them.
+ifeq ($(CC),$(CROSS_COMPILE)gcc)
+ifneq ($(wildcard $(srctree)/scripts/gcc-wrapper.py),)
+CC		= $(abspath $(srctree)/scripts/gcc-wrapper.py) $(CROSS_COMPILE)gcc
+endif
+endif
+
+CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
+		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
+NOSTDINC_FLAGS :=
+CFLAGS_MODULE   =
+AFLAGS_MODULE   =
+LDFLAGS_MODULE  =
+CFLAGS_KERNEL	=
+AFLAGS_KERNEL	=
+LDFLAGS_vmlinux =
+
+# Use USERINCLUDE when you must reference the UAPI directories only.
+USERINCLUDE    := \
+		-I$(srctree)/arch/$(SRCARCH)/include/uapi \
+		-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
+		-I$(srctree)/include/uapi \
+		-I$(objtree)/include/generated/uapi \
+                -include $(srctree)/include/linux/kconfig.h
+
+# Use LINUXINCLUDE when you must reference the include/ directory.
+# Needed to be compatible with the O= option
+LINUXINCLUDE    := \
+		-I$(srctree)/arch/$(SRCARCH)/include \
+		-I$(objtree)/arch/$(SRCARCH)/include/generated \
+		$(if $(building_out_of_srctree),-I$(srctree)/include) \
+		-I$(objtree)/include \
+		$(USERINCLUDE)
+
+KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-PIE
+KBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
+		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
+		   -Werror=implicit-function-declaration -Werror=implicit-int \
+		   -Werror=return-type -Wno-format-security \
+		   -std=gnu89
+KBUILD_CPPFLAGS := -D__KERNEL__
+KBUILD_AFLAGS_KERNEL :=
+KBUILD_CFLAGS_KERNEL :=
+KBUILD_AFLAGS_MODULE  := -DMODULE
+KBUILD_CFLAGS_MODULE  := -DMODULE
+KBUILD_LDFLAGS_MODULE :=
+KBUILD_LDFLAGS :=
+CLANG_FLAGS :=
+
+export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
+export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
+export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
+export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
+export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
+export KBUILD_USERCFLAGS KBUILD_USERLDFLAGS
+
+export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
+export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
+export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
+export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
+export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
+
+# Files to ignore in find ... statements
+
+export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
+			  -name CVS -o -name .pc -o -name .hg -o -name .git \) \
+			  -prune -o
+export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
+			 --exclude CVS --exclude .pc --exclude .hg --exclude .git
+
+# ===========================================================================
+# Rules shared between *config targets and build targets
+
+# Basic helpers built in scripts/basic/
+PHONY += scripts_basic
+scripts_basic:
+	$(Q)$(MAKE) $(build)=scripts/basic
+	$(Q)rm -f .tmp_quiet_recordmcount
+
+PHONY += outputmakefile
+# Before starting out-of-tree build, make sure the source tree is clean.
+# outputmakefile generates a Makefile in the output directory, if using a
+# separate output directory. This allows convenient use of make in the
+# output directory.
+# At the same time when output Makefile generated, generate .gitignore to
+# ignore whole output directory
+outputmakefile:
+ifdef building_out_of_srctree
+	$(Q)if [ -f $(srctree)/.config -o \
+		 -d $(srctree)/include/config -o \
+		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
+		echo >&2 "***"; \
+		echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
+		echo >&2 "*** in $(abs_srctree)";\
+		echo >&2 "***"; \
+		false; \
+	fi
+	$(Q)ln -fsn $(srctree) source
+	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
+	$(Q)test -e .gitignore || \
+	{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
+endif
+
+ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
+ifneq ($(CROSS_COMPILE),)
+CLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
+GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
+CLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
+GCC_TOOLCHAIN	:= $(realpath $(GCC_TOOLCHAIN_DIR)/..)
+endif
+ifneq ($(GCC_TOOLCHAIN),)
+CLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
+endif
+ifneq ($(LLVM_IAS),1)
+CLANG_FLAGS	+= -no-integrated-as
+endif
+CLANG_FLAGS	+= -Werror=unknown-warning-option
+KBUILD_CFLAGS	+= $(CLANG_FLAGS)
+KBUILD_AFLAGS	+= $(CLANG_FLAGS)
+export CLANG_FLAGS
+endif
+
+# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
+# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
+# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
+# and from include/config/auto.conf.cmd to detect the compiler upgrade.
+CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
+
+ifdef config-build
+# ===========================================================================
+# *config targets only - make sure prerequisites are updated, and descend
+# in scripts/kconfig to make the *config target
+
+# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
+# KBUILD_DEFCONFIG may point out an alternative default configuration
+# used for 'make defconfig'
+include arch/$(SRCARCH)/Makefile
+export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
+
+config: outputmakefile scripts_basic FORCE
+	$(Q)$(MAKE) $(build)=scripts/kconfig $@
+
+%config: outputmakefile scripts_basic FORCE
+	$(Q)$(MAKE) $(build)=scripts/kconfig $@
+
+else #!config-build
+# ===========================================================================
+# Build targets only - this includes vmlinux, arch specific targets, clean
+# targets and others. In general all targets except *config targets.
+
+# If building an external module we do not care about the all: rule
+# but instead __all depend on modules
+PHONY += all
+ifeq ($(KBUILD_EXTMOD),)
+__all: all
+else
+__all: modules
+endif
+
+# Decide whether to build built-in, modular, or both.
+# Normally, just do built-in.
+
+KBUILD_MODULES :=
+KBUILD_BUILTIN := 1
+
+# If we have only "make modules", don't compile built-in objects.
+ifeq ($(MAKECMDGOALS),modules)
+  KBUILD_BUILTIN :=
+endif
+
+# If we have "make <whatever> modules", compile modules
+# in addition to whatever we do anyway.
+# Just "make" or "make all" shall build modules as well
+
+ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
+  KBUILD_MODULES := 1
+endif
+
+ifeq ($(MAKECMDGOALS),)
+  KBUILD_MODULES := 1
+endif
+
+export KBUILD_MODULES KBUILD_BUILTIN
+
+ifdef need-config
+include include/config/auto.conf
+endif
+
+ifeq ($(KBUILD_EXTMOD),)
+# Objects we will link into vmlinux / subdirs we need to visit
+core-y		:= init/ usr/
+drivers-y	:= drivers/ sound/
+drivers-$(CONFIG_SAMPLES) += samples/
+drivers-y	+= net/ virt/
+libs-y		:= lib/
+endif # KBUILD_EXTMOD
+
+ifndef KBUILD_MIXED_TREE
+# The all: target is the default when no target is given on the
+# command line.
+# This allow a user to issue only 'make' to build a kernel including modules
+# Defaults to vmlinux, but the arch makefile usually adds further targets
+all: vmlinux
+endif
+
+CFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
+	$(call cc-option,-fno-tree-loop-im) \
+	$(call cc-disable-warning,maybe-uninitialized,)
+export CFLAGS_GCOV
+
+# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
+ifdef CONFIG_FUNCTION_TRACER
+  CC_FLAGS_FTRACE := -pg
+endif
+
+RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
+RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
+RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
+RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
+RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
+RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
+export RETPOLINE_CFLAGS
+export RETPOLINE_VDSO_CFLAGS
+
+include arch/$(SRCARCH)/Makefile
+
+ifdef need-config
+ifdef may-sync-config
+# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
+# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
+# because some architectures define CROSS_COMPILE there.
+include include/config/auto.conf.cmd
+
+$(KCONFIG_CONFIG):
+	@echo >&2 '***'
+	@echo >&2 '*** Configuration file "$@" not found!'
+	@echo >&2 '***'
+	@echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
+	@echo >&2 '*** "make menuconfig" or "make xconfig").'
+	@echo >&2 '***'
+	@/bin/false
+
+# The actual configuration files used during the build are stored in
+# include/generated/ and include/config/. Update them if .config is newer than
+# include/config/auto.conf (which mirrors .config).
+#
+# This exploits the 'multi-target pattern rule' trick.
+# The syncconfig should be executed only once to make all the targets.
+# (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
+#
+# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig,
+# so you cannot notice that Kconfig is waiting for the user input.
+%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
+	$(Q)$(kecho) "  SYNC    $@"
+	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
+else # !may-sync-config
+# External modules and some install targets need include/generated/autoconf.h
+# and include/config/auto.conf but do not care if they are up-to-date.
+# Use auto.conf to trigger the test
+PHONY += include/config/auto.conf
+
+include/config/auto.conf:
+	$(Q)test -e include/generated/autoconf.h -a -e $@ || (		\
+	echo >&2;							\
+	echo >&2 "  ERROR: Kernel configuration is invalid.";		\
+	echo >&2 "         include/generated/autoconf.h or $@ are missing.";\
+	echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to fix it.";	\
+	echo >&2 ;							\
+	/bin/false)
+
+endif # may-sync-config
+endif # need-config
+
+KBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
+KBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
+KBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
+KBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
+KBUILD_CFLAGS	+= $(call cc-disable-warning, address-of-packed-member)
+
+ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
+KBUILD_CFLAGS += -O2
+else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
+KBUILD_CFLAGS += -O3
+else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
+KBUILD_CFLAGS += -Os
+endif
+
+# Tell gcc to never replace conditional load with a non-conditional one
+KBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
+KBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
+
+ifdef CONFIG_READABLE_ASM
+# Disable optimizations that make assembler listings hard to read.
+# reorder blocks reorders the control in the function
+# ipa clone creates specialized cloned functions
+# partial inlining inlines only parts of functions
+KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
+                 $(call cc-option,-fno-ipa-cp-clone,) \
+                 $(call cc-option,-fno-partial-inlining)
+endif
+
+ifneq ($(CONFIG_FRAME_WARN),0)
+KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
+endif
+
+stackp-flags-y                                    := -fno-stack-protector
+stackp-flags-$(CONFIG_STACKPROTECTOR)             := -fstack-protector
+stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG)      := -fstack-protector-strong
+
+KBUILD_CFLAGS += $(stackp-flags-y)
+
+ifdef CONFIG_CC_IS_CLANG
+KBUILD_CPPFLAGS += -Qunused-arguments
+KBUILD_CFLAGS += -Wno-format-invalid-specifier
+KBUILD_CFLAGS += -Wno-gnu
+# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
+# source of a reference will be _MergedGlobals and not on of the whitelisted names.
+# See modpost pattern 2
+KBUILD_CFLAGS += -mno-global-merge
+else
+
+# Warn about unmarked fall-throughs in switch statement.
+# Disabled for clang while comment to attribute conversion happens and
+# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
+KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
+endif
+
+# These warnings generated too much noise in a regular build.
+# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
+KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
+KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
+
+# These result in bogus false positives
+KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
+
+ifdef CONFIG_FRAME_POINTER
+KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
+else
+# Some targets (ARM with Thumb2, for example), can't be built with frame
+# pointers.  For those, we don't have FUNCTION_TRACER automatically
+# select FRAME_POINTER.  However, FUNCTION_TRACER adds -pg, and this is
+# incompatible with -fomit-frame-pointer with current GCC, so we don't use
+# -fomit-frame-pointer with FUNCTION_TRACER.
+ifndef CONFIG_FUNCTION_TRACER
+KBUILD_CFLAGS	+= -fomit-frame-pointer
+endif
+endif
+
+# Initialize all stack variables with a 0xAA pattern.
+ifdef CONFIG_INIT_STACK_ALL_PATTERN
+KBUILD_CFLAGS	+= -ftrivial-auto-var-init=pattern
+endif
+
+# Initialize all stack variables with a zero value.
+ifdef CONFIG_INIT_STACK_ALL_ZERO
+# Future support for zero initialization is still being debated, see
+# https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
+# renamed or dropped.
+KBUILD_CFLAGS	+= -ftrivial-auto-var-init=zero
+KBUILD_CFLAGS	+= -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
+endif
+
+DEBUG_CFLAGS	:=
+
+# Workaround for GCC versions < 5.0
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
+ifdef CONFIG_CC_IS_GCC
+DEBUG_CFLAGS	+= $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments))
+endif
+
+ifdef CONFIG_DEBUG_INFO
+
+ifdef CONFIG_DEBUG_INFO_SPLIT
+DEBUG_CFLAGS	+= -gsplit-dwarf
+else
+DEBUG_CFLAGS	+= -g
+endif
+
+ifneq ($(LLVM_IAS),1)
+KBUILD_AFLAGS	+= -Wa,-gdwarf-2
+endif
+
+ifdef CONFIG_DEBUG_INFO_DWARF4
+DEBUG_CFLAGS	+= -gdwarf-4
+endif
+
+ifdef CONFIG_DEBUG_INFO_REDUCED
+DEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
+		   $(call cc-option,-fno-var-tracking)
+endif
+
+ifdef CONFIG_DEBUG_INFO_COMPRESSED
+DEBUG_CFLAGS	+= -gz=zlib
+KBUILD_AFLAGS	+= -gz=zlib
+KBUILD_LDFLAGS	+= --compress-debug-sections=zlib
+endif
+
+endif # CONFIG_DEBUG_INFO
+
+KBUILD_CFLAGS += $(DEBUG_CFLAGS)
+export DEBUG_CFLAGS
+
+ifdef CONFIG_FUNCTION_TRACER
+ifdef CONFIG_FTRACE_MCOUNT_USE_CC
+  CC_FLAGS_FTRACE	+= -mrecord-mcount
+  ifdef CONFIG_HAVE_NOP_MCOUNT
+    ifeq ($(call cc-option-yn, -mnop-mcount),y)
+      CC_FLAGS_FTRACE	+= -mnop-mcount
+      CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
+    endif
+  endif
+endif
+ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
+  CC_FLAGS_USING	+= -DCC_USING_NOP_MCOUNT
+endif
+ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
+  ifdef CONFIG_HAVE_C_RECORDMCOUNT
+    BUILD_C_RECORDMCOUNT := y
+    export BUILD_C_RECORDMCOUNT
+  endif
+endif
+ifdef CONFIG_HAVE_FENTRY
+  ifeq ($(call cc-option-yn, -mfentry),y)
+    CC_FLAGS_FTRACE	+= -mfentry
+    CC_FLAGS_USING	+= -DCC_USING_FENTRY
+  endif
+endif
+export CC_FLAGS_FTRACE
+KBUILD_CFLAGS	+= $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
+KBUILD_AFLAGS	+= $(CC_FLAGS_USING)
+endif
+
+# We trigger additional mismatches with less inlining
+ifdef CONFIG_DEBUG_SECTION_MISMATCH
+KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
+endif
+
+ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
+KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
+LDFLAGS_vmlinux += --gc-sections
+endif
+
+ifdef CONFIG_SHADOW_CALL_STACK
+CC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
+KBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
+export CC_FLAGS_SCS
+endif
+
+ifdef CONFIG_LTO_CLANG
+ifdef CONFIG_LTO_CLANG_THIN
+CC_FLAGS_LTO	:= -flto=thin -fsplit-lto-unit
+KBUILD_LDFLAGS	+= --thinlto-cache-dir=$(extmod-prefix).thinlto-cache
+else
+CC_FLAGS_LTO	:= -flto
+endif
+
+ifeq ($(SRCARCH),x86)
+# TODO(b/182572011): Revert workaround for compiler / linker bug.
+CC_FLAGS_LTO	+= -fvisibility=hidden
+else
+CC_FLAGS_LTO	+= -fvisibility=default
+endif
+
+# Limit inlining across translation units to reduce binary size
+KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
+endif
+
+ifdef CONFIG_LTO
+KBUILD_CFLAGS	+= $(CC_FLAGS_LTO)
+export CC_FLAGS_LTO
+endif
+
+ifdef CONFIG_CFI_CLANG
+CC_FLAGS_CFI	:= -fsanitize=cfi \
+		   -fsanitize-cfi-cross-dso \
+		   -fno-sanitize-cfi-canonical-jump-tables \
+		   -fno-sanitize-blacklist
+
+ifdef CONFIG_CFI_PERMISSIVE
+CC_FLAGS_CFI	+= -fsanitize-recover=cfi \
+		   -fno-sanitize-trap=cfi
+else
+ifndef CONFIG_UBSAN_TRAP
+CC_FLAGS_CFI	+= -ftrap-function=__ubsan_handle_cfi_check_fail_abort
+endif
+endif
+
+# If LTO flags are filtered out, we must also filter out CFI.
+CC_FLAGS_LTO	+= $(CC_FLAGS_CFI)
+KBUILD_CFLAGS	+= $(CC_FLAGS_CFI)
+export CC_FLAGS_CFI
+endif
+
+ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B
+KBUILD_CFLAGS += -falign-functions=32
+endif
+
+# arch Makefile may override CC so keep this after arch Makefile is included
+NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
+
+# warn about C99 declaration after statement
+KBUILD_CFLAGS += -Wdeclaration-after-statement
+
+# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
+KBUILD_CFLAGS += -Wvla
+
+# disable pointer signed / unsigned warnings in gcc 4.0
+KBUILD_CFLAGS += -Wno-pointer-sign
+
+# disable stringop warnings in gcc 8+
+KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
+
+# We'll want to enable this eventually, but it's not going away for 5.7 at least
+KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
+KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
+KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
+
+# Another good warning that we'll want to enable eventually
+KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
+
+# Enabled with W=2, disabled by default as noisy
+KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
+
+# disable invalid "can't wrap" optimizations for signed / pointers
+KBUILD_CFLAGS	+= -fno-strict-overflow
+
+# Make sure -fstack-check isn't enabled (like gentoo apparently did)
+KBUILD_CFLAGS  += -fno-stack-check
+
+# conserve stack if available
+KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
+
+# Prohibit date/time macros, which would make the build non-deterministic
+KBUILD_CFLAGS   += -Werror=date-time
+
+# enforce correct pointer usage
+KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
+
+# Require designated initializers for all marked structures
+KBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
+
+# change __FILE__ to the relative path from the srctree
+KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
+
+# include additional Makefiles when needed
+include-y			:= scripts/Makefile.extrawarn
+include-$(CONFIG_KASAN)		+= scripts/Makefile.kasan
+include-$(CONFIG_KCSAN)		+= scripts/Makefile.kcsan
+include-$(CONFIG_UBSAN)		+= scripts/Makefile.ubsan
+include-$(CONFIG_KCOV)		+= scripts/Makefile.kcov
+include-$(CONFIG_GCC_PLUGINS)	+= scripts/Makefile.gcc-plugins
+
+include $(addprefix $(srctree)/, $(include-y))
+
+# scripts/Makefile.gcc-plugins is intentionally included last.
+# Do not add $(call cc-option,...) below this line. When you build the kernel
+# from the clean source tree, the GCC plugins do not exist at this point.
+
+# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
+KBUILD_CPPFLAGS += $(KCPPFLAGS)
+KBUILD_AFLAGS   += $(KAFLAGS)
+KBUILD_CFLAGS   += $(KCFLAGS)
+
+KBUILD_LDFLAGS_MODULE += --build-id=sha1
+LDFLAGS_vmlinux += --build-id=sha1
+
+ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
+LDFLAGS_vmlinux	+= $(call ld-option, -X,)
+endif
+
+ifeq ($(CONFIG_RELR),y)
+LDFLAGS_vmlinux	+= --pack-dyn-relocs=relr --use-android-relr-tags
+endif
+
+# We never want expected sections to be placed heuristically by the
+# linker. All sections should be explicitly named in the linker script.
+ifdef CONFIG_LD_ORPHAN_WARN
+LDFLAGS_vmlinux += --orphan-handling=warn
+endif
+
+# Align the bit size of userspace programs with the kernel
+KBUILD_USERCFLAGS  += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
+KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
+
+# make the checker run with the right architecture
+CHECKFLAGS += --arch=$(ARCH)
+
+# insure the checker run with the right endianness
+CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
+
+# the checker needs the correct machine size
+CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
+
+# Default kernel image to build when no specific target is given.
+# KBUILD_IMAGE may be overruled on the command line or
+# set in the environment
+# Also any assignments in arch/$(ARCH)/Makefile take precedence over
+# this default value
+export KBUILD_IMAGE ?= vmlinux
+
+#
+# INSTALL_PATH specifies where to place the updated kernel and system map
+# images. Default is /boot, but you can set it to other values
+export	INSTALL_PATH ?= /boot
+
+#
+# INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
+# Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
+# an argument if needed. Otherwise it defaults to the kernel install path
+#
+export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
+
+#
+# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
+# relocations required by build roots.  This is not defined in the
+# makefile but the argument can be passed to make if needed.
+#
+
+MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
+export MODLIB
+
+#
+# INSTALL_MOD_STRIP, if defined, will cause modules to be
+# stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
+# the default option --strip-debug will be used.  Otherwise,
+# INSTALL_MOD_STRIP value will be used as the options to the strip command.
+
+ifdef INSTALL_MOD_STRIP
+ifeq ($(INSTALL_MOD_STRIP),1)
+mod_strip_cmd = $(STRIP) --strip-debug
+else
+mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
+endif # INSTALL_MOD_STRIP=1
+else
+mod_strip_cmd = true
+endif # INSTALL_MOD_STRIP
+export mod_strip_cmd
+
+# CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
+# after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
+# or CONFIG_MODULE_COMPRESS_XZ.
+
+mod_compress_cmd = true
+ifdef CONFIG_MODULE_COMPRESS
+  ifdef CONFIG_MODULE_COMPRESS_GZIP
+    mod_compress_cmd = $(KGZIP) -n -f
+  endif # CONFIG_MODULE_COMPRESS_GZIP
+  ifdef CONFIG_MODULE_COMPRESS_XZ
+    mod_compress_cmd = $(XZ) -f
+  endif # CONFIG_MODULE_COMPRESS_XZ
+endif # CONFIG_MODULE_COMPRESS
+export mod_compress_cmd
+
+ifdef CONFIG_MODULE_SIG_ALL
+$(eval $(call config_filename,MODULE_SIG_KEY))
+
+mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
+else
+mod_sign_cmd = true
+endif
+export mod_sign_cmd
+
+HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
+
+has_libelf := $(call try-run,\
+                echo "int main() {}" | \
+                $(HOSTCC) $(KBUILD_HOSTCFLAGS) -xc -o /dev/null $(KBUILD_HOSTLDFLAGS) $(HOST_LIBELF_LIBS) -,1,0)
+
+ifdef CONFIG_STACK_VALIDATION
+  ifeq ($(has_libelf),1)
+    objtool_target := tools/objtool FORCE
+  else
+    SKIP_STACK_VALIDATION := 1
+    export SKIP_STACK_VALIDATION
+  endif
+endif
+
+PHONY += resolve_btfids_clean
+
+resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
+
+# tools/bpf/resolve_btfids directory might not exist
+# in output directory, skip its clean in that case
+resolve_btfids_clean:
+ifneq ($(wildcard $(resolve_btfids_O)),)
+	$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
+endif
+
+ifdef CONFIG_BPF
+ifdef CONFIG_DEBUG_INFO_BTF
+  ifeq ($(has_libelf),1)
+    resolve_btfids_target := tools/bpf/resolve_btfids FORCE
+  else
+    ERROR_RESOLVE_BTFIDS := 1
+  endif
+endif # CONFIG_DEBUG_INFO_BTF
+endif # CONFIG_BPF
+
+PHONY += prepare0
+
+export MODORDER := $(extmod-prefix)modules.order
+export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
+
+# ---------------------------------------------------------------------------
+# Kernel headers
+
+PHONY += headers
+
+#Default location for installed headers
+ifeq ($(KBUILD_EXTMOD),)
+PHONY += archheaders archscripts
+hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
+headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
+else
+hdr-prefix = $(KBUILD_EXTMOD)/
+hdr-inst := -f $(srctree)/scripts/Makefile.headersinst dst=$(KBUILD_EXTMOD)/usr/include objtree=$(objtree)/$(KBUILD_EXTMOD) obj
+endif
+
+export INSTALL_HDR_PATH = $(objtree)/$(hdr-prefix)usr
+
+quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
+      cmd_headers_install = \
+	mkdir -p $(INSTALL_HDR_PATH); \
+	rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
+	$(hdr-prefix)usr/include $(INSTALL_HDR_PATH);
+
+PHONY += headers_install
+headers_install: headers
+	$(call cmd,headers_install)
+
+headers:
+ifeq ($(KBUILD_EXTMOD),)
+	$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
+	  $(error Headers not exportable for the $(SRCARCH) architecture))
+endif
+	$(Q)$(MAKE) $(hdr-inst)=$(hdr-prefix)include/uapi
+	$(Q)$(MAKE) $(hdr-inst)=$(hdr-prefix)arch/$(SRCARCH)/include/uapi
+
+ifeq ($(KBUILD_EXTMOD),)
+core-y		+= kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
+
+vmlinux-dirs	:= $(patsubst %/,%,$(filter %/, \
+		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
+		     $(libs-y) $(libs-m)))
+
+vmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
+		     $(patsubst %/,%,$(filter %/, $(core-) \
+			$(drivers-) $(libs-))))
+
+subdir-modorder := $(addsuffix modules.order,$(filter %/, \
+			$(core-y) $(core-m) $(libs-y) $(libs-m) \
+			$(drivers-y) $(drivers-m)))
+
+build-dirs	:= $(vmlinux-dirs)
+clean-dirs	:= $(vmlinux-alldirs)
+
+# Externally visible symbols (used by link-vmlinux.sh)
+KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
+KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
+ifdef CONFIG_MODULES
+KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
+KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
+else
+KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
+endif
+KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
+
+export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
+export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
+# used by scripts/Makefile.package
+export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
+
+vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
+
+# Recurse until adjust_autoksyms.sh is satisfied
+PHONY += autoksyms_recursive
+ifdef CONFIG_TRIM_UNUSED_KSYMS
+# For the kernel to actually contain only the needed exported symbols,
+# we have to build modules as well to determine what those symbols are.
+# (this can be evaluated only once include/config/auto.conf has been included)
+KBUILD_MODULES := 1
+
+autoksyms_recursive: descend modules.order
+	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
+	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
+endif
+
+autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
+
+quiet_cmd_autoksyms_h = GEN     $@
+      cmd_autoksyms_h = mkdir -p $(dir $@); \
+			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
+
+$(autoksyms_h):
+	$(call cmd,autoksyms_h)
+
+ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
+
+# Final link of vmlinux with optional arch pass after final link
+cmd_link-vmlinux =                                                 \
+	$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)";    \
+	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
+
+ifndef KBUILD_MIXED_TREE
+vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
+	+$(call if_changed,link-vmlinux)
+endif
+
+targets := vmlinux
+
+# The actual objects are generated when descending,
+# make sure no implicit rule kicks in
+$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
+
+filechk_kernel.release = \
+	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion \
+		$(srctree) $(BRANCH) $(KMI_GENERATION))"
+
+# Store (new) KERNELRELEASE string in include/config/kernel.release
+include/config/kernel.release: FORCE
+	$(call filechk,kernel.release)
+
+# Additional helpers built in scripts/
+# Carefully list dependencies so we do not try to build scripts twice
+# in parallel
+PHONY += scripts
+scripts: scripts_basic scripts_dtc
+	$(Q)$(MAKE) $(build)=$(@)
+
+# Things we need to do before we recursively start building the kernel
+# or the modules are listed in "prepare".
+# A multi level approach is used. prepareN is processed before prepareN-1.
+# archprepare is used in arch Makefiles and when processed asm symlink,
+# version.h and scripts_basic is processed / created.
+
+PHONY += prepare archprepare
+
+archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
+	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
+	include/generated/autoconf.h
+
+prepare0: archprepare
+	$(Q)$(MAKE) $(build)=scripts/mod
+	$(Q)$(MAKE) $(build)=.
+
+# All the preparing..
+prepare: prepare0 prepare-objtool prepare-resolve_btfids
+
+# Support for using generic headers in asm-generic
+asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
+
+PHONY += asm-generic uapi-asm-generic
+asm-generic: uapi-asm-generic
+	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
+	generic=include/asm-generic
+uapi-asm-generic:
+	$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
+	generic=include/uapi/asm-generic
+
+PHONY += prepare-objtool prepare-resolve_btfids
+prepare-objtool: $(objtool_target)
+ifeq ($(SKIP_STACK_VALIDATION),1)
+ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
+	@echo "error: Cannot generate __mcount_loc for CONFIG_DYNAMIC_FTRACE=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
+	@false
+endif
+ifdef CONFIG_UNWINDER_ORC
+	@echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
+	@false
+else
+	@echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
+endif
+endif
+
+prepare-resolve_btfids: $(resolve_btfids_target)
+ifeq ($(ERROR_RESOLVE_BTFIDS),1)
+	@echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
+	@false
+endif
+# Generate some files
+# ---------------------------------------------------------------------------
+
+# KERNELRELEASE can change from a few different places, meaning version.h
+# needs to be updated, so this check is forced on all builds
+
+uts_len := 64
+ifneq (,$(BUILD_NUMBER))
+	UTS_RELEASE=$(KERNELRELEASE)-ab$(BUILD_NUMBER)
+else
+	UTS_RELEASE=$(KERNELRELEASE)
+endif
+define filechk_utsrelease.h
+	if [ `echo -n "$(UTS_RELEASE)" | wc -c ` -gt $(uts_len) ]; then \
+		echo '"$(UTS_RELEASE)" exceeds $(uts_len) characters' >&2;    \
+		exit 1;                                                       \
+	fi;                                                             \
+	echo \#define UTS_RELEASE \"$(UTS_RELEASE)\"
+endef
+
+define filechk_version.h
+	if [ $(SUBLEVEL) -gt 255 ]; then                                 \
+		echo \#define LINUX_VERSION_CODE $(shell                 \
+		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
+	else                                                             \
+		echo \#define LINUX_VERSION_CODE $(shell                 \
+		expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
+	fi;                                                              \
+	echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) +  \
+	((c) > 255 ? 255 : (c)))'
+endef
+
+$(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
+$(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
+$(version_h): FORCE
+	$(call filechk,version.h)
+	$(Q)rm -f $(old_version_h)
+
+include/generated/utsrelease.h: include/config/kernel.release FORCE
+	$(call filechk,utsrelease.h)
+
+PHONY += headerdep
+headerdep:
+	$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
+	$(srctree)/scripts/headerdep.pl -I$(srctree)/include
+
+# Deprecated. It is no-op now.
+PHONY += headers_check
+headers_check:
+	@:
+
+ifdef CONFIG_HEADERS_INSTALL
+prepare: headers
+endif
+
+PHONY += scripts_unifdef
+scripts_unifdef: scripts_basic
+	$(Q)$(MAKE) $(build)=scripts scripts/unifdef
+
+# ---------------------------------------------------------------------------
+# Kernel selftest
+
+PHONY += kselftest
+kselftest:
+	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
+
+kselftest-%: FORCE
+	$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
+
+PHONY += kselftest-merge
+kselftest-merge:
+	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
+	$(Q)find $(srctree)/tools/testing/selftests -name config | \
+		xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
+	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
+
+# ---------------------------------------------------------------------------
+# Devicetree files
+
+ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
+dtstree := arch/$(SRCARCH)/boot/dts
+endif
+
+ifneq ($(dtstree),)
+
+%.dtb: include/config/kernel.release scripts_dtc
+	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
+
+%.dtbo: include/config/kernel.release scripts_dtc
+	$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
+
+PHONY += dtbs dtbs_install dtbs_check
+dtbs: include/config/kernel.release scripts_dtc
+	$(Q)$(MAKE) $(build)=$(dtstree)
+
+ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
+export CHECK_DTBS=y
+dtbs: dt_binding_check
+endif
+
+dtbs_check: dtbs
+
+dtbs_install:
+	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
+
+ifdef CONFIG_OF_EARLY_FLATTREE
+all: dtbs
+endif
+
+endif
+
+PHONY += scripts_dtc
+scripts_dtc: scripts_basic
+	$(Q)$(MAKE) $(build)=scripts/dtc
+
+ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
+export CHECK_DT_BINDING=y
+endif
+
+PHONY += dt_binding_check
+dt_binding_check: scripts_dtc
+	$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
+
+# ---------------------------------------------------------------------------
+# Modules
+
+ifdef CONFIG_MODULES
+
+# By default, build modules as well
+
+all: modules
+
+# When we're building modules with modversions, we need to consider
+# the built-in objects during the descend as well, in order to
+# make sure the checksums are up to date before we record them.
+ifdef CONFIG_MODVERSIONS
+  KBUILD_BUILTIN := 1
+endif
+
+# Build modules
+#
+# A module can be listed more than once in obj-m resulting in
+# duplicate lines in modules.order files.  Those are removed
+# using awk while concatenating to the final file.
+
+PHONY += modules
+# if KBUILD_BUILTIN && !KBUILD_MIXED_TREE, depend on vmlinux
+modules: $(if $(KBUILD_BUILTIN), $(if $(KBUILD_MIXED_TREE),,vmlinux))
+modules: modules_check modules_prepare
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
+
+PHONY += modules_check
+modules_check: modules.order
+	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
+
+cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
+
+modules.order: $(subdir-modorder) FORCE
+	$(call if_changed,modules_order)
+
+targets += modules.order
+
+# Target to prepare building external modules
+PHONY += modules_prepare
+modules_prepare: prepare
+	$(Q)$(MAKE) $(build)=scripts scripts/module.lds
+
+# Target to install modules
+PHONY += modules_install
+modules_install: _modinst_ _modinst_post
+
+PHONY += _modinst_
+_modinst_:
+	@rm -rf $(MODLIB)/kernel
+	@rm -f $(MODLIB)/source
+	@mkdir -p $(MODLIB)/kernel
+	@ln -s $(abspath $(srctree)) $(MODLIB)/source
+	@if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
+		rm -f $(MODLIB)/build ; \
+		ln -s $(CURDIR) $(MODLIB)/build ; \
+	fi
+	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
+	@cp -f $(mixed-build-prefix)modules.builtin $(MODLIB)/
+	@cp -f $(or $(mixed-build-prefix),$(objtree)/)modules.builtin.modinfo $(MODLIB)/
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
+
+# This depmod is only for convenience to give the initial
+# boot a modules.dep even before / is mounted read-write.  However the
+# boot script depmod is the master version.
+PHONY += _modinst_post
+_modinst_post: _modinst_
+	$(call cmd,depmod)
+
+ifeq ($(CONFIG_MODULE_SIG), y)
+PHONY += modules_sign
+modules_sign:
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
+endif
+
+else # CONFIG_MODULES
+
+# Modules not configured
+# ---------------------------------------------------------------------------
+
+PHONY += modules modules_install
+modules modules_install:
+	@echo >&2
+	@echo >&2 "The present kernel configuration has modules disabled."
+	@echo >&2 "Type 'make config' and enable loadable module support."
+	@echo >&2 "Then build a kernel with module support enabled."
+	@echo >&2
+	@exit 1
+
+endif # CONFIG_MODULES
+
+###
+# Cleaning is done on three levels.
+# make clean     Delete most generated files
+#                Leave enough to build external modules
+# make mrproper  Delete the current configuration, and all generated files
+# make distclean Remove editor backup files, patch leftover files and the like
+
+# Directories & files removed with 'make clean'
+CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
+	       modules.builtin modules.builtin.modinfo modules.nsdeps \
+	       compile_commands.json .thinlto-cache
+
+# Directories & files removed with 'make mrproper'
+MRPROPER_FILES += include/config include/generated          \
+		  arch/$(SRCARCH)/include/generated .tmp_objdiff \
+		  debian snap tar-install \
+		  .config .config.old .version \
+		  Module.symvers \
+		  signing_key.pem signing_key.priv signing_key.x509	\
+		  x509.genkey extra_certificates signing_key.x509.keyid	\
+		  signing_key.x509.signer vmlinux-gdb.py \
+		  *.spec
+
+# Directories & files removed with 'make distclean'
+DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
+
+# clean - Delete most, but leave enough to build external modules
+#
+clean: rm-files := $(CLEAN_FILES)
+
+PHONY += archclean vmlinuxclean
+
+vmlinuxclean:
+	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
+	$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
+
+clean: archclean vmlinuxclean resolve_btfids_clean
+
+# mrproper - Delete all generated files, including .config
+#
+mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
+mrproper-dirs      := $(addprefix _mrproper_,scripts)
+
+PHONY += $(mrproper-dirs) mrproper
+$(mrproper-dirs):
+	$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
+
+mrproper: clean $(mrproper-dirs)
+	$(call cmd,rmfiles)
+
+# distclean
+#
+distclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
+
+PHONY += distclean
+
+distclean: mrproper
+	$(call cmd,rmfiles)
+	@find $(srctree) $(RCS_FIND_IGNORE) \
+		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
+		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
+		-o -name 'core' \) \
+		-type f -print | xargs rm -f
+
+
+# Packaging of the kernel to various formats
+# ---------------------------------------------------------------------------
+
+%src-pkg: FORCE
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
+%pkg: include/config/kernel.release FORCE
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
+
+# Brief documentation of the typical targets used
+# ---------------------------------------------------------------------------
+
+boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
+boards := $(sort $(notdir $(boards)))
+board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
+board-dirs := $(sort $(notdir $(board-dirs:/=)))
+
+PHONY += help
+help:
+	@echo  'Cleaning targets:'
+	@echo  '  clean		  - Remove most generated files but keep the config and'
+	@echo  '                    enough build support to build external modules'
+	@echo  '  mrproper	  - Remove all generated files + config + various backup files'
+	@echo  '  distclean	  - mrproper + remove editor backup and patch files'
+	@echo  ''
+	@echo  'Configuration targets:'
+	@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
+	@echo  ''
+	@echo  'Other generic targets:'
+	@echo  '  all		  - Build all targets marked with [*]'
+	@echo  '* vmlinux	  - Build the bare kernel'
+	@echo  '* modules	  - Build all modules'
+	@echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
+	@echo  '  dir/            - Build all files in dir and below'
+	@echo  '  dir/file.[ois]  - Build specified target only'
+	@echo  '  dir/file.ll     - Build the LLVM assembly file'
+	@echo  '                    (requires compiler support for LLVM assembly generation)'
+	@echo  '  dir/file.lst    - Build specified mixed source/assembly target only'
+	@echo  '                    (requires a recent binutils and recent build (System.map))'
+	@echo  '  dir/file.ko     - Build module including final link'
+	@echo  '  modules_prepare - Set up for building external modules'
+	@echo  '  tags/TAGS	  - Generate tags file for editors'
+	@echo  '  cscope	  - Generate cscope index'
+	@echo  '  gtags           - Generate GNU GLOBAL index'
+	@echo  '  kernelrelease	  - Output the release version string (use with make -s)'
+	@echo  '  kernelversion	  - Output the version stored in Makefile (use with make -s)'
+	@echo  '  image_name	  - Output the image name (use with make -s)'
+	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
+	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \
+	 echo  ''
+	@echo  'Static analysers:'
+	@echo  '  checkstack      - Generate a list of stack hogs'
+	@echo  '  versioncheck    - Sanity check on version.h usage'
+	@echo  '  includecheck    - Check for duplicate included header files'
+	@echo  '  export_report   - List the usages of all exported symbols'
+	@echo  '  headerdep       - Detect inclusion cycles in headers'
+	@echo  '  coccicheck      - Check with Coccinelle'
+	@echo  '  clang-analyzer  - Check with clang static analyzer'
+	@echo  '  clang-tidy      - Check with clang-tidy'
+	@echo  ''
+	@echo  'Tools:'
+	@echo  '  nsdeps          - Generate missing symbol namespace dependencies'
+	@echo  ''
+	@echo  'Kernel selftest:'
+	@echo  '  kselftest         - Build and run kernel selftest'
+	@echo  '                      Build, install, and boot kernel before'
+	@echo  '                      running kselftest on it'
+	@echo  '                      Run as root for full coverage'
+	@echo  '  kselftest-all     - Build kernel selftest'
+	@echo  '  kselftest-install - Build and install kernel selftest'
+	@echo  '  kselftest-clean   - Remove all generated kselftest files'
+	@echo  '  kselftest-merge   - Merge all the config dependencies of'
+	@echo  '		      kselftest to existing .config.'
+	@echo  ''
+	@$(if $(dtstree), \
+		echo 'Devicetree:'; \
+		echo '* dtbs             - Build device tree blobs for enabled boards'; \
+		echo '  dtbs_install     - Install dtbs to $(INSTALL_DTBS_PATH)'; \
+		echo '  dt_binding_check - Validate device tree binding documents'; \
+		echo '  dtbs_check       - Validate device tree source files';\
+		echo '')
+
+	@echo 'Userspace tools targets:'
+	@echo '  use "make tools/help"'
+	@echo '  or  "cd tools; make help"'
+	@echo  ''
+	@echo  'Kernel packaging:'
+	@$(MAKE) -f $(srctree)/scripts/Makefile.package help
+	@echo  ''
+	@echo  'Documentation targets:'
+	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
+	@echo  ''
+	@echo  'Architecture specific targets ($(SRCARCH)):'
+	@$(if $(archhelp),$(archhelp),\
+		echo '  No architecture specific help defined for $(SRCARCH)')
+	@echo  ''
+	@$(if $(boards), \
+		$(foreach b, $(boards), \
+		printf "  %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
+		echo '')
+	@$(if $(board-dirs), \
+		$(foreach b, $(board-dirs), \
+		printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
+		printf "  %-16s - Show all of the above\\n" help-boards; \
+		echo '')
+
+	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
+	@echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
+	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
+	@echo  '  make C=1   [targets] Check re-compiled c source with $$CHECK'
+	@echo  '                       (sparse by default)'
+	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
+	@echo  '  make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
+	@echo  '  make W=n   [targets] Enable extra build checks, n=1,2,3 where'
+	@echo  '		1: warnings which may be relevant and do not occur too often'
+	@echo  '		2: warnings which occur quite often but may still be relevant'
+	@echo  '		3: more obscure warnings, can most likely be ignored'
+	@echo  '		Multiple levels can be combined with W=12 or W=123'
+	@echo  ''
+	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
+	@echo  'For further info see the ./README file'
+
+
+help-board-dirs := $(addprefix help-,$(board-dirs))
+
+help-boards: $(help-board-dirs)
+
+boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
+
+$(help-board-dirs): help-%:
+	@echo  'Architecture specific targets ($(SRCARCH) $*):'
+	@$(if $(boards-per-dir), \
+		$(foreach b, $(boards-per-dir), \
+		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
+		echo '')
+
+
+# Documentation targets
+# ---------------------------------------------------------------------------
+DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
+	       linkcheckdocs dochelp refcheckdocs
+PHONY += $(DOC_TARGETS)
+$(DOC_TARGETS):
+	$(Q)$(MAKE) $(build)=Documentation $@
+
+# Misc
+# ---------------------------------------------------------------------------
+
+PHONY += scripts_gdb
+scripts_gdb: prepare0
+	$(Q)$(MAKE) $(build)=scripts/gdb
+	$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
+
+ifdef CONFIG_GDB_SCRIPTS
+all: scripts_gdb
+endif
+
+else # KBUILD_EXTMOD
+
+###
+# External module support.
+# When building external modules the kernel used as basis is considered
+# read-only, and no consistency checks are made and the make
+# system is not used on the basis kernel. If updates are required
+# in the basis kernel ordinary make commands (without M=...) must
+# be used.
+#
+# The following are the only valid targets when building external
+# modules.
+# make M=dir clean     Delete all automatically generated files
+# make M=dir modules   Make all modules in specified dir
+# make M=dir	       Same as 'make M=dir modules'
+# make M=dir modules_install
+#                      Install the modules built in the module directory
+#                      Assumes install directory is already created
+
+# We are always building only modules.
+KBUILD_BUILTIN :=
+KBUILD_MODULES := 1
+
+build-dirs := $(KBUILD_EXTMOD)
+PHONY += modules
+modules: $(MODORDER)
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
+
+$(MODORDER): descend
+	@:
+
+PHONY += modules_install
+modules_install: _emodinst_ _emodinst_post
+
+install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
+PHONY += _emodinst_
+_emodinst_:
+	$(Q)mkdir -p $(MODLIB)/$(install-dir)
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
+
+PHONY += _emodinst_post
+_emodinst_post: _emodinst_
+	$(call cmd,depmod)
+
+compile_commands.json: $(extmod-prefix)compile_commands.json
+PHONY += compile_commands.json
+
+clean-dirs := $(KBUILD_EXTMOD)
+clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
+	$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
+
+PHONY += help
+help:
+	@echo  '  Building external modules.'
+	@echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
+	@echo  ''
+	@echo  '  modules         - default target, build the module(s)'
+	@echo  '  modules_install - install the module'
+	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'
+	@echo  '                    (default: $(abspath $(INSTALL_HDR_PATH)))'
+	@echo  '  clean           - remove generated files in module directory only'
+	@echo  ''
+
+# no-op for external module builds
+PHONY += prepare modules_prepare
+
+endif # KBUILD_EXTMOD
+
+# Single targets
+# ---------------------------------------------------------------------------
+# To build individual files in subdirectories, you can do like this:
+#
+#   make foo/bar/baz.s
+#
+# The supported suffixes for single-target are listed in 'single-targets'
+#
+# To build only under specific subdirectories, you can do like this:
+#
+#   make foo/bar/baz/
+
+ifdef single-build
+
+# .ko is special because modpost is needed
+single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
+single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
+
+$(single-ko): single_modpost
+	@:
+$(single-no-ko): descend
+	@:
+
+ifeq ($(KBUILD_EXTMOD),)
+# For the single build of in-tree modules, use a temporary file to avoid
+# the situation of modules_install installing an invalid modules.order.
+MODORDER := .modules.tmp
+endif
+
+PHONY += single_modpost
+single_modpost: $(single-no-ko) modules_prepare
+	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
+
+KBUILD_MODULES := 1
+
+export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
+
+# trim unrelated directories
+build-dirs := $(foreach d, $(build-dirs), \
+			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
+
+endif
+
+ifndef CONFIG_MODULES
+KBUILD_MODULES :=
+endif
+
+# Handle descending into subdirectories listed in $(build-dirs)
+# Preset locale variables to speed up the build process. Limit locale
+# tweaks to this spot to avoid wrong language settings when running
+# make menuconfig etc.
+# Error messages still appears in the original language
+PHONY += descend $(build-dirs)
+descend: $(build-dirs)
+$(build-dirs): prepare
+	$(Q)$(MAKE) $(build)=$@ \
+	single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
+	$(if $(KBUILD_MIXED_TREE),,need-builtin=1) need-modorder=1
+
+clean-dirs := $(addprefix _clean_, $(clean-dirs))
+PHONY += $(clean-dirs) clean
+$(clean-dirs):
+	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
+
+clean: $(clean-dirs)
+	$(call cmd,rmfiles)
+	@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
+		\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
+		-o -name '*.ko.*' \
+		-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
+		-o -name '*.dwo' -o -name '*.lst' \
+		-o -name '*.su' -o -name '*.mod' \
+		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
+		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
+		-o -name '*.asn1.[ch]' \
+		-o -name '*.symtypes' -o -name 'modules.order' \
+		-o -name '.tmp_*.o.*' \
+		-o -name '*.c.[012]*.*' \
+		-o -name '*.ll' \
+		-o -name '*.gcno' \
+		-o -name '*.*.symversions' \) -type f -print | xargs rm -f
+
+# Generate tags for editors
+# ---------------------------------------------------------------------------
+quiet_cmd_tags = GEN     $@
+      cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
+
+tags TAGS cscope gtags: FORCE
+	$(call cmd,tags)
+
+# Script to generate missing namespace dependencies
+# ---------------------------------------------------------------------------
+
+PHONY += nsdeps
+nsdeps: export KBUILD_NSDEPS=1
+nsdeps: modules
+	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
+
+# Clang Tooling
+# ---------------------------------------------------------------------------
+
+quiet_cmd_gen_compile_commands = GEN     $@
+      cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
+
+$(extmod-prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
+	$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
+	$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
+	$(call if_changed,gen_compile_commands)
+
+targets += $(extmod-prefix)compile_commands.json
+
+PHONY += clang-tidy clang-analyzer
+
+ifdef CONFIG_CC_IS_CLANG
+quiet_cmd_clang_tools = CHECK   $<
+      cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
+
+clang-tidy clang-analyzer: $(extmod-prefix)compile_commands.json
+	$(call cmd,clang_tools)
+else
+clang-tidy clang-analyzer:
+	@echo "$@ requires CC=clang" >&2
+	@false
+endif
+
+# Scripts to check various things for consistency
+# ---------------------------------------------------------------------------
+
+PHONY += includecheck versioncheck coccicheck export_report
+
+includecheck:
+	find $(srctree)/* $(RCS_FIND_IGNORE) \
+		-name '*.[hcS]' -type f -print | sort \
+		| xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
+
+versioncheck:
+	find $(srctree)/* $(RCS_FIND_IGNORE) \
+		-name '*.[hcS]' -type f -print | sort \
+		| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
+
+coccicheck:
+	$(Q)$(BASH) $(srctree)/scripts/$@
+
+export_report:
+	$(PERL) $(srctree)/scripts/export_report.pl
+
+PHONY += checkstack kernelrelease kernelversion image_name
+
+# UML needs a little special treatment here.  It wants to use the host
+# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
+# else wants $(ARCH), including people doing cross-builds, which means
+# that $(SUBARCH) doesn't work here.
+ifeq ($(ARCH), um)
+CHECKSTACK_ARCH := $(SUBARCH)
+else
+CHECKSTACK_ARCH := $(ARCH)
+endif
+checkstack:
+	$(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
+	$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
+
+kernelrelease:
+	@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion \
+		$(srctree) $(BRANCH) $(KMI_GENERATION))"
+
+kernelversion:
+	@echo $(KERNELVERSION)
+
+image_name:
+	@echo $(KBUILD_IMAGE)
+
+# Clear a bunch of variables before executing the submake
+
+ifeq ($(quiet),silent_)
+tools_silent=s
+endif
+
+tools/: FORCE
+	$(Q)mkdir -p $(objtree)/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 $(srctree)/tools/ $*
+
+quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
+      cmd_rmfiles = rm -rf $(rm-files)
+
+# Run depmod only if we have System.map and depmod is executable
+quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
+      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
+                   $(KERNELRELEASE) $(mixed-build-prefix)
+
+# read saved command lines for existing targets
+existing-targets := $(wildcard $(sort $(targets)))
+
+-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
+
+endif # config-build
+endif # mixed-build
+endif # need-sub-make
+
+PHONY += FORCE
+FORCE:
+
+# Declare the contents of the PHONY variable as phony.  We keep that
+# information in a variable so we can use it in if_changed and friends.
+.PHONY: $(PHONY)