Kbuild updates for v5.2

- allow users to invoke 'make' out of the source tree
 
 - refactor scripts/mkmakefile
 
 - deprecate KBUILD_SRC, which was used to track the source tree
   location for O= build.
 
 - fix recordmcount.pl in case objdump output is localized
 
 - turn unresolved symbols in external modules to errors from warnings
   by default; pass KBUILD_MODPOST_WARN=1 to get them back to warnings
 
 - generate modules.builtin.modinfo to collect .modinfo data from
   built-in modules
 
 - misc Makefile cleanups
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJc0upmAAoJED2LAQed4NsGreoP/jkKQojVdzTjM/nn/Xe9FrE9
 elQ59Wu/gW/q7jouN733WTJ2fRPAEVaGPw/CT/cCRWjNJjd6MM4voDKVxifZE+u4
 qz5XUGq4Mjozd0MJdU1LA1dIRJrEaPofOj7E0JEIerEdLPKpv4kjCCbbHOZwN2Kl
 YrpPFJkYspCRVG+txEWY8YaZeU/+OAdNckJnMkX8hnUwsNplAlPw4L/5Y12Uncuz
 7g/3T1f701pJhStoO4OPR/+Rivi0EX5AP7TZyv2/FOwTO+Oau5G1rF0j1BT0+ceg
 d+bApuaHLR4ocZ6GvWfACMYhH7ais0BUgAwi6HY/b78SGMmNB6xlD5biVqcklx6c
 mjrPNaj6WJEQIflZ3yr83tRNhTu7xXRKZkrGHHUjOGNsRULuD8RFrXtusl06A22S
 hA3vt2SF4FuLBabPw5yFkKNOTX+P5dG79BC1fWIQjglBGoYqWTRQNYoottr/7t2T
 Si+E6J2lAD0EDNuc/EFKWfrgONfatgcdgQuTibwCcE2KfYnMG/C+9DvxRV4lAQtn
 fYpap9gws+0AisbVx0m1W088NMFiwrMbN3n3KITGY/15XDmeySEA1QgPKFN8JHJd
 Do0duaMx8BHjkA5ms/Bf0AZd0tWUkWVdt0epwU2KafWNGK7VaPnhKxn5eQOGkWV+
 gT3J3XZc3b7OEOQ4XX3Z
 =zj9w
 -----END PGP SIGNATURE-----

Merge tag 'kbuild-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - allow users to invoke 'make' out of the source tree

 - refactor scripts/mkmakefile

 - deprecate KBUILD_SRC, which was used to track the source tree
   location for O= build.

 - fix recordmcount.pl in case objdump output is localized

 - turn unresolved symbols in external modules to errors from warnings
   by default; pass KBUILD_MODPOST_WARN=1 to get them back to warnings

 - generate modules.builtin.modinfo to collect .modinfo data from
   built-in modules

 - misc Makefile cleanups

* tag 'kbuild-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (21 commits)
  .gitignore: add more all*.config patterns
  moduleparam: Save information about built-in modules in separate file
  Remove MODULE_ALIAS() calls that take undefined macro
  .gitignore: add leading and trailing slashes to generated directories
  scripts/tags.sh: fix direct execution of scripts/tags.sh
  scripts: override locale from environment when running recordmcount.pl
  samples: kobject: allow CONFIG_SAMPLE_KOBJECT to become y
  samples: seccomp: turn CONFIG_SAMPLE_SECCOMP into a bool option
  kbuild: move Documentation to vmlinux-alldirs
  kbuild: move samples/ to KBUILD_VMLINUX_OBJS
  modpost: make KBUILD_MODPOST_WARN also configurable for external modules
  kbuild: check arch/$(SRCARCH)/include/generated before out-of-tree build
  kbuild: remove unneeded dependency for include/config/kernel.release
  memory: squash drivers/memory/Makefile.asm-offsets
  kbuild: use $(srctree) instead of KBUILD_SRC to check out-of-tree build
  kbuild: mkmakefile: generate a simple wrapper of top Makefile
  kbuild: mkmakefile: do not check the generated Makefile marker
  kbuild: allow Kbuild to start from any directory
  kbuild: pass $(MAKECMDGOALS) to sub-make as is
  kbuild: fix warning "overriding recipe for target 'Makefile'"
  ...

.gitignore

@@ -58,6 +58,7 @@ modules.builtin
 /vmlinuz
 /System.map
 /Module.markers
+/modules.builtin.modinfo
 
 #
 # RPM spec file (make rpm-pkg)
@@ -90,10 +91,10 @@ modules.builtin
 #
 # Generated include files
 #
-include/config
+/include/config/
-include/generated
+/include/generated/
-include/ksym
+/include/ksym/
-arch/*/include/generated
+/arch/*/include/generated/
 
 # stgit generated dirs
 patches-*
@@ -129,7 +130,12 @@ signing_key.x509
 x509.genkey
 
 # Kconfig presets
-all.config
+/all.config
+/alldef.config
+/allmod.config
+/allno.config
+/allrandom.config
+/allyes.config
 
 # Kdevelop4
 *.kdev4

Documentation/dontdiff

@@ -179,6 +179,7 @@ mktree
 mkutf8data
 modpost
 modules.builtin
+modules.builtin.modinfo
 modules.order
 modversions.h*
 nconf

Documentation/kbuild/kbuild.txt

@@ -11,6 +11,11 @@ modules.builtin
 This file lists all modules that are built into the kernel. This is used
 by modprobe to not fail when trying to load something builtin.
 
+modules.builtin.modinfo
+--------------------------------------------------
+This file contains modinfo from all modules that are built into the kernel.
+Unlike modinfo of a separate module, all fields are prefixed with module name.
+
 
 Environment variables
 

Makefile

@@ -96,56 +96,65 @@ endif
 
 export quiet Q KBUILD_VERBOSE
 
-# kbuild supports saving output files in a separate directory.
+# Kbuild will save output files in the current working directory.
-# To locate output files in a separate directory two syntaxes are supported.
+# This does not need to match to the root of the kernel source tree.
-# In both cases the working directory must be the root of the kernel src.
+#
+# 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 directory
+# Set the environment variable KBUILD_OUTPUT to point to the output directory.
-# where the output files shall be placed.
+# export KBUILD_OUTPUT=dir/to/store/output/files/; make
-# export KBUILD_OUTPUT=dir/to/store/output/files/
-# make
 #
 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
 # variable.
 
-# KBUILD_SRC is not intended to be used by the regular user (for now),
+# Do we want to change the working directory?
-# it is set on invocation of make with KBUILD_OUTPUT or O= specified.
-
-# OK, Make called in directory where kernel src resides
-# Do we want to locate output files in a separate directory?
 ifeq ("$(origin O)", "command line")
   KBUILD_OUTPUT := $(O)
 endif
 
-ifneq ($(words $(subst :, ,$(CURDIR))), 1)
+ifneq ($(KBUILD_OUTPUT),)
-  $(error main directory cannot contain spaces nor colons)
+# 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
 
-ifneq ($(KBUILD_OUTPUT),)
+abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
-# check that the output directory actually exists
-saved-output := $(KBUILD_OUTPUT)
-KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
-								&& pwd)
-$(if $(KBUILD_OUTPUT),, \
-     $(error failed to create output directory "$(saved-output)"))
 
+ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
+$(error source directory cannot contain spaces or colons)
+endif
+
+ifneq ($(abs_srctree),$(abs_objtree))
 # Look for make include files relative to root of kernel src
 #
 # This does not become effective immediately because MAKEFLAGS is re-parsed
-# once after the Makefile is read.  It is OK since we are going to invoke
+# once after the Makefile is read. We need to invoke sub-make.
-# 'sub-make' below.
+MAKEFLAGS += --include-dir=$(abs_srctree)
-MAKEFLAGS += --include-dir=$(CURDIR)
-
 need-sub-make := 1
-else
+endif
-
-# Do not print "Entering directory ..." at all for in-tree build.
-MAKEFLAGS += --no-print-directory
-
-endif # ifneq ($(KBUILD_OUTPUT),)
 
 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
@@ -155,20 +164,19 @@ need-sub-make := 1
 $(lastword $(MAKEFILE_LIST)): ;
 endif
 
+export abs_srctree abs_objtree
 export sub_make_done := 1
 
 ifeq ($(need-sub-make),1)
 
 PHONY += $(MAKECMDGOALS) sub-make
 
-$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
+$(filter-out _all sub-make $(lastword $(MAKEFILE_LIST)), $(MAKECMDGOALS)) _all: sub-make
 	@:
 
 # Invoke a second make in the output directory, passing relevant variables
 sub-make:
-	$(Q)$(MAKE) \
+	$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
-	$(if $(KBUILD_OUTPUT),-C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR)) \
-	-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
 
 endif # need-sub-make
 endif # sub_make_done
@@ -213,16 +221,21 @@ ifeq ("$(origin M)", "command line")
   KBUILD_EXTMOD := $(M)
 endif
 
-ifeq ($(KBUILD_SRC),)
+ifeq ($(abs_srctree),$(abs_objtree))
         # building in the source tree
         srctree := .
 else
-        ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
+        ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
                 # building in a subdirectory of the source tree
                 srctree := ..
         else
-                srctree := $(KBUILD_SRC)
+                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)
 endif
 
 export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
@@ -436,7 +449,7 @@ USERINCLUDE    := \
 LINUXINCLUDE    := \
 		-I$(srctree)/arch/$(SRCARCH)/include \
 		-I$(objtree)/arch/$(SRCARCH)/include/generated \
-		$(if $(KBUILD_SRC), -I$(srctree)/include) \
+		$(if $(filter .,$(srctree)),,-I$(srctree)/include) \
 		-I$(objtree)/include \
 		$(USERINCLUDE)
 
@@ -497,7 +510,7 @@ PHONY += outputmakefile
 # At the same time when output Makefile generated, generate .gitignore to
 # ignore whole output directory
 outputmakefile:
-ifneq ($(KBUILD_SRC),)
+ifneq ($(srctree),.)
 	$(Q)ln -fsn $(srctree) source
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
 	$(Q)test -e .gitignore || \
@@ -520,15 +533,6 @@ KBUILD_AFLAGS	+= $(CLANG_FLAGS)
 export CLANG_FLAGS
 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
-
 # 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),
@@ -595,20 +599,21 @@ endif
 
 export KBUILD_MODULES KBUILD_BUILTIN
 
+ifeq ($(dot-config),1)
+include include/config/auto.conf
+endif
+
 ifeq ($(KBUILD_EXTMOD),)
 # Objects we will link into vmlinux / subdirs we need to visit
 init-y		:= init/
 drivers-y	:= drivers/ sound/
+drivers-$(CONFIG_SAMPLES) += samples/
 net-y		:= net/
 libs-y		:= lib/
 core-y		:= usr/
 virt-y		:= virt/
 endif # KBUILD_EXTMOD
 
-ifeq ($(dot-config),1)
-include include/config/auto.conf
-endif
-
 # 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
@@ -625,6 +630,15 @@ 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
+
 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
 # values of the respective KBUILD_* variables
 ARCH_CPPFLAGS :=
@@ -985,8 +999,9 @@ vmlinux-dirs	:= $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 		     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 		     $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
 
-vmlinux-alldirs	:= $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
+vmlinux-alldirs	:= $(sort $(vmlinux-dirs) Documentation \
-		     $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
+		     $(patsubst %/,%,$(filter %/, $(init-) $(core-) \
+			$(drivers-) $(net-) $(libs-) $(virt-))))
 
 init-y		:= $(patsubst %/, %/built-in.a, $(init-y))
 core-y		:= $(patsubst %/, %/built-in.a, $(core-y))
@@ -1003,7 +1018,7 @@ export KBUILD_VMLINUX_LIBS := $(libs-y1)
 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
 export LDFLAGS_vmlinux
 # used by scripts/package/Makefile
-export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
+export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch include scripts tools)
 
 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
 
@@ -1040,11 +1055,8 @@ vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
 
 targets := vmlinux
 
-# Build samples along the rest of the kernel. This needs headers_install.
+# Some samples need headers_install.
-ifdef CONFIG_SAMPLES
-vmlinux-dirs += samples
 samples: headers_install
-endif
 
 # The actual objects are generated when descending,
 # make sure no implicit rule kicks in
@@ -1064,7 +1076,7 @@ filechk_kernel.release = \
 	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
 
 # Store (new) KERNELRELEASE string in include/config/kernel.release
-include/config/kernel.release: $(srctree)/Makefile FORCE
+include/config/kernel.release: FORCE
 	$(call filechk,kernel.release)
 
 # Additional helpers built in scripts/
@@ -1086,9 +1098,11 @@ PHONY += prepare archprepare prepare1 prepare3
 # and if so do:
 # 1) Check that make has not been executed in the kernel src $(srctree)
 prepare3: include/config/kernel.release
-ifneq ($(KBUILD_SRC),)
+ifneq ($(srctree),.)
 	@$(kecho) '  Using $(srctree) as source for kernel'
-	$(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
+	$(Q)if [ -f $(srctree)/.config -o \
+		 -d $(srctree)/include/config -o \
+		 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
 		echo >&2 "  $(srctree) is not clean, please run 'make mrproper'"; \
 		echo >&2 "  in the '$(srctree)' directory.";\
 		/bin/false; \
@@ -1304,6 +1318,7 @@ _modinst_:
 	fi
 	@cp -f $(objtree)/modules.order $(MODLIB)/
 	@cp -f $(objtree)/modules.builtin $(MODLIB)/
+	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 
 # This depmod is only for convenience to give the initial
@@ -1344,10 +1359,11 @@ endif # CONFIG_MODULES
 
 # Directories & files removed with 'make clean'
 CLEAN_DIRS  += $(MODVERDIR) include/ksym
+CLEAN_FILES += modules.builtin.modinfo
 
 # Directories & files removed with 'make mrproper'
 MRPROPER_DIRS  += include/config usr/include include/generated          \
-		  arch/*/include/generated .tmp_objdiff
+		  arch/$(SRCARCH)/include/generated .tmp_objdiff
 MRPROPER_FILES += .config .config.old .version \
 		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
 		  signing_key.pem signing_key.priv signing_key.x509	\
@@ -1358,7 +1374,7 @@ MRPROPER_FILES += .config .config.old .version \
 #
 clean: rm-dirs  := $(CLEAN_DIRS)
 clean: rm-files := $(CLEAN_FILES)
-clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
+clean-dirs      := $(addprefix _clean_, . $(vmlinux-alldirs))
 
 PHONY += $(clean-dirs) clean archclean vmlinuxclean
 $(clean-dirs):

arch/arm/plat-omap/dma.c

@@ -1449,7 +1449,6 @@ static void __exit omap_system_dma_exit(void)
 
 MODULE_DESCRIPTION("OMAP SYSTEM DMA DRIVER");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:" DRIVER_NAME);
 MODULE_AUTHOR("Texas Instruments Inc");
 
 /*

drivers/clocksource/timer-ti-dm.c

@@ -970,5 +970,4 @@ module_platform_driver(omap_dm_timer_driver);
 
 MODULE_DESCRIPTION("OMAP Dual-Mode Timer Driver");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:" DRIVER_NAME);
 MODULE_AUTHOR("Texas Instruments Inc");

drivers/memory/Makefile

@@ -28,6 +28,9 @@ ti-emif-sram-objs		:= ti-emif-pm.o ti-emif-sram-pm.o
 
 AFLAGS_ti-emif-sram-pm.o	:=-Wa,-march=armv7-a
 
-include drivers/memory/Makefile.asm-offsets
-
 drivers/memory/ti-emif-sram-pm.o: include/generated/ti-emif-asm-offsets.h
+
+include/generated/ti-emif-asm-offsets.h: drivers/memory/emif-asm-offsets.s FORCE
+	$(call filechk,offsets,__TI_EMIF_ASM_OFFSETS_H__)
+
+targets += emif-asm-offsets.s

drivers/memory/Makefile.asm-offsets

@@ -1,4 +0,0 @@
-include/generated/ti-emif-asm-offsets.h: drivers/memory/emif-asm-offsets.s FORCE
-	$(call filechk,offsets,__TI_EMIF_ASM_OFFSETS_H__)
-
-targets += emif-asm-offsets.s

drivers/mfd/omap-usb-tll.c

@@ -459,7 +459,6 @@ EXPORT_SYMBOL_GPL(omap_tll_disable);
 
 MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
 MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
-MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers");
 

include/asm-generic/vmlinux.lds.h

@@ -844,6 +844,7 @@
 	EXIT_CALL							\
 	*(.discard)							\
 	*(.discard.*)							\
+	*(.modinfo)							\
 	}
 
 /**

include/linux/module.h

@@ -253,6 +253,7 @@ extern typeof(name) __mod_##type##__##name##_device_table		\
 #define MODULE_VERSION(_version) MODULE_INFO(version, _version)
 #else
 #define MODULE_VERSION(_version)					\
+	MODULE_INFO(version, _version);					\
 	static struct module_version_attribute ___modver_attr = {	\
 		.mattr	= {						\
 			.attr	= {					\

include/linux/moduleparam.h

@@ -10,23 +10,21 @@
    module name. */
 #ifdef MODULE
 #define MODULE_PARAM_PREFIX /* empty */
+#define __MODULE_INFO_PREFIX /* empty */
 #else
 #define MODULE_PARAM_PREFIX KBUILD_MODNAME "."
+/* We cannot use MODULE_PARAM_PREFIX because some modules override it. */
+#define __MODULE_INFO_PREFIX KBUILD_MODNAME "."
 #endif
 
 /* Chosen so that structs with an unsigned long line up. */
 #define MAX_PARAM_PREFIX_LEN (64 - sizeof(unsigned long))
 
-#ifdef MODULE
 #define __MODULE_INFO(tag, name, info)					  \
 static const char __UNIQUE_ID(name)[]					  \
   __used __attribute__((section(".modinfo"), unused, aligned(1)))	  \
-  = __stringify(tag) "=" info
+  = __MODULE_INFO_PREFIX __stringify(tag) "=" info
-#else  /* !MODULE */
+
-/* This struct is here for syntactic coherency, it is not used */
-#define __MODULE_INFO(tag, name, info)					  \
-  struct __UNIQUE_ID(name) {}
-#endif
 #define __MODULE_PARM_TYPE(name, _type)					  \
   __MODULE_INFO(parmtype, name##type, #name ":" _type)
 

samples/Kconfig

@@ -20,8 +20,7 @@ config SAMPLE_TRACE_PRINTK
 	 test various trace_printk() calls from a module.
 
 config SAMPLE_KOBJECT
-	tristate "Build kobject examples -- loadable modules only"
+	tristate "Build kobject examples"
-	depends on m
 	help
 	  This config option will allow you to build a number of
 	  different kobject sample modules showing how to use kobjects,
@@ -103,8 +102,8 @@ config SAMPLE_CONNECTOR
 	  See also Documentation/connector/connector.txt
 
 config SAMPLE_SECCOMP
-	tristate "Build seccomp sample code -- loadable modules only"
+	bool "Build seccomp sample code"
-	depends on SECCOMP_FILTER && m
+	depends on SECCOMP_FILTER
 	help
 	  Build samples of seccomp filters using various methods of
 	  BPF filter construction.

samples/Makefile

@@ -1,6 +1,6 @@
 # Makefile for Linux samples code
 
-obj-$(CONFIG_SAMPLES)	+= kobject/ kprobes/ trace_events/ livepatch/ \
+obj-y			+= kobject/ kprobes/ trace_events/ livepatch/ \
 			   hw_breakpoint/ kfifo/ kdb/ hidraw/ rpmsg/ seccomp/ \
 			   configfs/ connector/ v4l/ trace_printk/ \
 			   vfio-mdev/ vfs/ qmi/ binderfs/ pidfd/

samples/seccomp/Makefile

@@ -40,5 +40,5 @@ HOSTLDLIBS_bpf-fancy += $(MFLAG)
 HOSTLDLIBS_dropper += $(MFLAG)
 HOSTLDLIBS_user-trap += $(MFLAG)
 endif
-always := $(hostprogs-m)
+always := $(hostprogs-y)
 endif

scripts/Makefile.build

@@ -504,7 +504,7 @@ existing-targets := $(wildcard $(sort $(targets)))
 
 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
 
-ifneq ($(KBUILD_SRC),)
+ifneq ($(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.host

@@ -71,7 +71,7 @@ __hostc_flags	= $(_hostc_flags)
 __hostcxx_flags	= $(_hostcxx_flags)
 
 ifeq ($(KBUILD_EXTMOD),)
-ifneq ($(KBUILD_SRC),)
+ifneq ($(srctree),.)
 __hostc_flags	= -I$(obj) $(call flags,_hostc_flags)
 __hostcxx_flags	= -I$(obj) $(call flags,_hostcxx_flags)
 endif

scripts/Makefile.lib

@@ -144,7 +144,7 @@ __cpp_flags     = $(_cpp_flags)
 # If building the kernel in a separate objtree expand all occurrences
 # of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
 ifeq ($(KBUILD_EXTMOD),)
-ifneq ($(KBUILD_SRC),)
+ifneq ($(srctree),.)
 
 # -I$(obj) locates generated .h files
 # $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files

scripts/Makefile.modbuiltin

@@ -15,7 +15,7 @@ include include/config/tristate.conf
 
 include scripts/Kbuild.include
 
-ifneq ($(KBUILD_SRC),)
+ifneq ($(srctree),.)
 # Create output directory if not already present
 _dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
 endif

scripts/Makefile.modpost

@@ -78,7 +78,7 @@ modpost = scripts/mod/modpost                    \
  $(if $(KBUILD_EXTRA_SYMBOLS), $(patsubst %, -e %,$(KBUILD_EXTRA_SYMBOLS))) \
  $(if $(KBUILD_EXTMOD),-o $(modulesymfile))      \
  $(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E)  \
- $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w)
+ $(if $(KBUILD_MODPOST_WARN),-w)
 
 MODPOST_OPT=$(subst -i,-n,$(filter -i,$(MAKEFLAGS)))
 

scripts/gdb/linux/Makefile

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-ifneq ($(KBUILD_SRC),)
+ifneq ($(srctree),.)
 
 symlinks := $(patsubst $(srctree)/$(src)/%,%,$(wildcard $(srctree)/$(src)/*.py))
 

scripts/link-vmlinux.sh

@@ -212,6 +212,9 @@ modpost_link vmlinux.o
 # modpost vmlinux.o to check for section mismatches
 ${MAKE} -f "${srctree}/scripts/Makefile.modpost" vmlinux.o
 
+info MODINFO modules.builtin.modinfo
+${OBJCOPY} -j .modinfo -O binary vmlinux.o modules.builtin.modinfo
+
 kallsymso=""
 kallsyms_vmlinux=""
 if [ -n "${CONFIG_KALLSYMS}" ]; then

scripts/mkmakefile

@@ -7,33 +7,11 @@
 # Usage
 # $1 - Kernel src directory
 
-# Only overwrite automatically generated Makefiles
-# (so we do not overwrite kernel Makefile)
-if test -e Makefile && ! grep -q Automatically Makefile
-then
-	exit 0
-fi
 if [ "${quiet}" != "silent_" ]; then
 	echo "  GEN     Makefile"
 fi
 
 cat << EOF > Makefile
-# Automatically generated by $0: don't edit
+# Automatically generated by $(realpath $0): don't edit
-
+include $(realpath $1/Makefile)
-ifeq ("\$(origin V)", "command line")
-VERBOSE := \$(V)
-endif
-ifneq (\$(VERBOSE),1)
-Q := @
-endif
-
-MAKEFLAGS += --no-print-directory
-
-.PHONY: __sub-make \$(MAKECMDGOALS)
-
-__sub-make:
-	\$(Q)\$(MAKE) -C $1 O=\$(CURDIR) \$(MAKECMDGOALS)
-
-\$(filter-out __sub-make, \$(MAKECMDGOALS)): __sub-make
-	@:
 EOF

scripts/recordmcount.pl

@@ -496,7 +496,7 @@ sub update_funcs
 #
 # Step 2: find the sections and mcount call sites
 #
-open(IN, "$objdump -hdr $inputfile|") || die "error running $objdump";
+open(IN, "LANG=C $objdump -hdr $inputfile|") || die "error running $objdump";
 
 my $text;
 

scripts/tags.sh

@@ -19,7 +19,7 @@ ignore="$ignore ( -name *.mod.c ) -prune -o"
 # Do not use full path if we do not use O=.. builds
 # Use make O=. {tags|cscope}
 # to force full paths for a non-O= build
-if [ "${KBUILD_SRC}" = "" ]; then
+if [ "${srctree}" = "." -o -z "${srctree}" ]; then
 	tree=
 else
 	tree=${srctree}/