Kbuild updates for v5.3 (2nd)

- match the directory structure of the linux-libc-dev package to that of
   Debian-based distributions
 
 - fix incorrect include/config/auto.conf generation when Kconfig creates
   it along with the .config file
 
 - remove misleading $(AS) from documents
 
 - clean up precious tag files by distclean instead of mrproper
 
 - add a new coccinelle patch for devm_platform_ioremap_resource migration
 
 - refactor module-related scripts to read modules.order instead of
   $(MODVERDIR)/*.mod files to get the list of created modules
 
 - remove MODVERDIR
 
 - update list of header compile-test
 
 - add -fcf-protection=none flag to avoid conflict with the retpoline
   flags when CONFIG_RETPOLINE=y
 
 - misc cleanups
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Merge tag 'kbuild-v5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull more Kbuild updates from Masahiro Yamada:

 - match the directory structure of the linux-libc-dev package to that
   of Debian-based distributions

 - fix incorrect include/config/auto.conf generation when Kconfig
   creates it along with the .config file

 - remove misleading $(AS) from documents

 - clean up precious tag files by distclean instead of mrproper

 - add a new coccinelle patch for devm_platform_ioremap_resource
   migration

 - refactor module-related scripts to read modules.order instead of
   $(MODVERDIR)/*.mod files to get the list of created modules

 - remove MODVERDIR

 - update list of header compile-test

 - add -fcf-protection=none flag to avoid conflict with the retpoline
   flags when CONFIG_RETPOLINE=y

 - misc cleanups

* tag 'kbuild-v5.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (25 commits)
  kbuild: add -fcf-protection=none when using retpoline flags
  kbuild: update compile-test header list for v5.3-rc1
  kbuild: split out *.mod out of {single,multi}-used-m rules
  kbuild: remove 'prepare1' target
  kbuild: remove the first line of *.mod files
  kbuild: create *.mod with full directory path and remove MODVERDIR
  kbuild: export_report: read modules.order instead of .tmp_versions/*.mod
  kbuild: modpost: read modules.order instead of $(MODVERDIR)/*.mod
  kbuild: modsign: read modules.order instead of $(MODVERDIR)/*.mod
  kbuild: modinst: read modules.order instead of $(MODVERDIR)/*.mod
  scsi: remove pointless $(MODVERDIR)/$(obj)/53c700.ver
  kbuild: remove duplication from modules.order in sub-directories
  kbuild: get rid of kernel/ prefix from in-tree modules.{order,builtin}
  kbuild: do not create empty modules.order in the prepare stage
  coccinelle: api: add devm_platform_ioremap_resource script
  kbuild: compile-test headers listed in header-test-m as well
  kbuild: remove unused hostcc-option
  kbuild: remove tag files by distclean instead of mrproper
  kbuild: add --hash-style= and --build-id unconditionally
  kbuild: get rid of misleading $(AS) from documents
  ...

.gitignore

@@ -30,6 +30,7 @@
 *.lz4
 *.lzma
 *.lzo
+*.mod
 *.mod.c
 *.o
 *.o.*

Documentation/dontdiff

@@ -30,6 +30,7 @@
 *.lzo
 *.mo
 *.moc
+*.mod
 *.mod.c
 *.o
 *.o.*

Documentation/kbuild/kbuild.rst

@@ -38,12 +38,11 @@ Additional options to the assembler (for built-in and modules).
 
 AFLAGS_MODULE
 -------------
-Additional module specific options to use for $(AS).
+Additional assembler options for modules.
 
 AFLAGS_KERNEL
 -------------
-Additional options for $(AS) when used for assembler
+Additional assembler options for built-in.
-code for code that is compiled as built-in.
 
 KCFLAGS
 -------

Documentation/kbuild/makefiles.rst

@@ -328,7 +328,7 @@ more details, with real examples.
 	variable $(KBUILD_CFLAGS) and uses it for compilation flags for the
 	entire tree.
 
-	asflags-y specifies options for assembling with $(AS).
+	asflags-y specifies assembler options.
 
 	Example::
 
@@ -490,7 +490,7 @@ more details, with real examples.
 	as-instr checks if the assembler reports a specific instruction
 	and then outputs either option1 or option2
 	C escapes are supported in the test instruction
-	Note: as-instr-option uses KBUILD_AFLAGS for $(AS) options
+	Note: as-instr-option uses KBUILD_AFLAGS for assembler options
 
     cc-option
 	cc-option is used to check if $(CC) supports a given option, and if
@@ -906,7 +906,7 @@ When kbuild executes, the following steps are followed (roughly):
 	vmlinux. The usage of $(call if_changed,xxx) will be described later.
 
     KBUILD_AFLAGS
-	$(AS) assembler flags
+	Assembler flags
 
 	Default value - see top level Makefile
 	Append or modify as required per architecture.
@@ -949,16 +949,16 @@ When kbuild executes, the following steps are followed (roughly):
 	to 'y' when selected.
 
     KBUILD_AFLAGS_KERNEL
-	$(AS) options specific for built-in
+	Assembler options specific for built-in
 
 	$(KBUILD_AFLAGS_KERNEL) contains extra C compiler flags used to compile
 	resident kernel code.
 
     KBUILD_AFLAGS_MODULE
-	Options for $(AS) when building modules
+	Assembler options specific for modules
 
 	$(KBUILD_AFLAGS_MODULE) is used to add arch-specific options that
-	are used for $(AS).
+	are used for assembler.
 
 	From commandline AFLAGS_MODULE shall be used (see kbuild.txt).
 

Makefile

@@ -486,11 +486,6 @@ export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
 export KBUILD_ARFLAGS
 
-# When compiling out-of-tree modules, put MODVERDIR in the module
-# tree rather than in the kernel tree. The kernel tree might
-# even be read-only.
-export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
-
 # Files to ignore in find ... statements
 
 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o    \
@@ -887,6 +882,12 @@ KBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)
 # change __FILE__ to the relative path from the srctree
 KBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
 
+# ensure -fcf-protection is disabled when using retpoline as it is
+# incompatible with -mindirect-branch=thunk-extern
+ifdef CONFIG_RETPOLINE
+KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
+endif
+
 # use the deterministic mode of AR if available
 KBUILD_ARFLAGS := $(call ar-option,D)
 
@@ -900,10 +901,8 @@ KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
 KBUILD_AFLAGS   += $(ARCH_AFLAGS)   $(KAFLAGS)
 KBUILD_CFLAGS   += $(ARCH_CFLAGS)   $(KCFLAGS)
 
-# Use --build-id when available.
+KBUILD_LDFLAGS_MODULE += --build-id
-LDFLAGS_BUILD_ID := $(call ld-option, --build-id)
+LDFLAGS_vmlinux += --build-id
-KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
-LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 
 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
 LDFLAGS_vmlinux	+= $(call ld-option, -X,)
@@ -1031,8 +1030,8 @@ vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
 
 # Recurse until adjust_autoksyms.sh is satisfied
 PHONY += autoksyms_recursive
-autoksyms_recursive: $(vmlinux-deps)
 ifdef CONFIG_TRIM_UNUSED_KSYMS
+autoksyms_recursive: $(vmlinux-deps) modules.order
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
 	  "$(MAKE) -f $(srctree)/Makefile vmlinux"
 endif
@@ -1074,7 +1073,7 @@ $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
 
 PHONY += $(vmlinux-dirs)
 $(vmlinux-dirs): prepare
-	$(Q)$(MAKE) $(build)=$@ need-builtin=1
+	$(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1
 
 filechk_kernel.release = \
 	echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
@@ -1096,7 +1095,7 @@ scripts: scripts_basic scripts_dtc
 # archprepare is used in arch Makefiles and when processed asm symlink,
 # version.h and scripts_basic is processed / created.
 
-PHONY += prepare archprepare prepare1 prepare3
+PHONY += prepare archprepare prepare3
 
 # prepare3 is used to check if we are building in a separate output directory,
 # and if so do:
@@ -1113,11 +1112,8 @@ ifdef building_out_of_srctree
 	fi;
 endif
 
-prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \
+archprepare: archheaders archscripts scripts prepare3 outputmakefile \
-						include/generated/utsrelease.h
+	asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
-	$(cmd_crmodverdir)
-
-archprepare: archheaders archscripts prepare1 scripts
 
 prepare0: archprepare
 	$(Q)$(MAKE) $(build)=scripts/mod
@@ -1331,8 +1327,8 @@ _modinst_:
 		rm -f $(MODLIB)/build ; \
 		ln -s $(CURDIR) $(MODLIB)/build ; \
 	fi
-	@cp -f $(objtree)/modules.order $(MODLIB)/
+	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
-	@cp -f $(objtree)/modules.builtin $(MODLIB)/
+	@sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin
 	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 
@@ -1373,18 +1369,22 @@ endif # CONFIG_MODULES
 # make distclean Remove editor backup files, patch leftover files and the like
 
 # Directories & files removed with 'make clean'
-CLEAN_DIRS  += $(MODVERDIR) include/ksym
+CLEAN_DIRS  += include/ksym
 CLEAN_FILES += modules.builtin.modinfo
 
 # Directories & files removed with 'make mrproper'
 MRPROPER_DIRS  += include/config include/generated          \
 		  arch/$(SRCARCH)/include/generated .tmp_objdiff
 MRPROPER_FILES += .config .config.old .version \
-		  Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
+		  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
 
+# Directories & files removed with 'make distclean'
+DISTCLEAN_DIRS  +=
+DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
+
 # clean - Delete most, but leave enough to build external modules
 #
 clean: rm-dirs  := $(CLEAN_DIRS)
@@ -1417,9 +1417,14 @@ mrproper: clean $(mrproper-dirs)
 
 # distclean
 #
+distclean: rm-dirs  := $(wildcard $(DISTCLEAN_DIRS))
+distclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
+
 PHONY += distclean
 
 distclean: mrproper
+	$(call cmd,rmdirs)
+	$(call cmd,rmfiles)
 	@find $(srctree) $(RCS_FIND_IGNORE) \
 		\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
 		-o -name '*.bak' -o -name '#*#' -o -name '*%' \
@@ -1609,7 +1614,7 @@ $(objtree)/Module.symvers:
 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
 PHONY += $(module-dirs) modules
 $(module-dirs): prepare $(objtree)/Module.symvers
-	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
+	$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) need-modorder=1
 
 modules: $(module-dirs)
 	@$(kecho) '  Building modules, stage 2.';
@@ -1634,7 +1639,6 @@ PHONY += $(clean-dirs) clean
 $(clean-dirs):
 	$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 
-clean:	rm-dirs := $(MODVERDIR)
 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
 
 PHONY += help
@@ -1648,8 +1652,6 @@ help:
 	@echo  ''
 
 PHONY += prepare
-prepare:
-	$(cmd_crmodverdir)
 endif # KBUILD_EXTMOD
 
 clean: $(clean-dirs)
@@ -1660,7 +1662,7 @@ clean: $(clean-dirs)
 		-o -name '*.ko.*' \
 		-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
 		-o -name '*.dwo' -o -name '*.lst' \
-		-o -name '*.su'  \
+		-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]' \
@@ -1765,8 +1767,6 @@ build-dir = $(patsubst %/,%,$(dir $(build-target)))
 	$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
 %.symtypes: prepare FORCE
 	$(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.ko: %.o
-	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 
 # Modules
 PHONY += /
@@ -1789,11 +1789,6 @@ quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
       cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
                    $(KERNELRELEASE)
 
-# Create temporary dir for module support files
-# clean it up only when building all modules
-cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
-                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
-
 # read saved command lines for existing targets
 existing-targets := $(wildcard $(sort $(targets)))
 

arch/arm/vdso/Makefile

@@ -13,8 +13,7 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING
 ldflags-$(CONFIG_CPU_ENDIAN_BE8) := --be8
 ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
 	    -z max-page-size=4096 -nostdlib -shared $(ldflags-y) \
-	    $(call ld-option, --hash-style=sysv) \
+	    --hash-style=sysv --build-id \
-	    $(call ld-option, --build-id) \
 	    -T
 
 obj-$(CONFIG_VDSO) += vdso.o

arch/arm64/kernel/vdso32/Makefile

@@ -96,8 +96,8 @@ VDSO_LDFLAGS := $(VDSO_CPPFLAGS)
 VDSO_LDFLAGS += -Wl,-Bsymbolic -Wl,--no-undefined -Wl,-soname=linux-vdso.so.1
 VDSO_LDFLAGS += -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
 VDSO_LDFLAGS += -nostdlib -shared -mfloat-abi=soft
-VDSO_LDFLAGS += $(call cc32-ldoption,-Wl$(comma)--hash-style=sysv)
+VDSO_LDFLAGS += -Wl,--hash-style=sysv
-VDSO_LDFLAGS += $(call cc32-ldoption,-Wl$(comma)--build-id)
+VDSO_LDFLAGS += -Wl,--build-id
 VDSO_LDFLAGS += $(call cc32-ldoption,-fuse-ld=bfd)
 
 

arch/riscv/Makefile

@@ -34,8 +34,6 @@ else
 	KBUILD_LDFLAGS += -melf32lriscv
 endif
 
-KBUILD_CFLAGS += -Wall
-
 # ISA string setting
 riscv-march-$(CONFIG_ARCH_RV32I)	:= rv32ima
 riscv-march-$(CONFIG_ARCH_RV64I)	:= rv64ima

arch/sparc/vdso/Makefile

@@ -115,8 +115,7 @@ quiet_cmd_vdso = VDSO    $@
 		       -T $(filter %.lds,$^) $(filter %.o,$^) && \
 		sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@'
 
-VDSO_LDFLAGS = -shared $(call ld-option, --hash-style=both) \
+VDSO_LDFLAGS = -shared --hash-style=both --build-id -Bsymbolic
-	$(call ld-option, --build-id) -Bsymbolic
 GCOV_PROFILE := n
 
 #

arch/x86/entry/vdso/Makefile

@@ -176,9 +176,8 @@ quiet_cmd_vdso = VDSO    $@
 		       -T $(filter %.lds,$^) $(filter %.o,$^) && \
 		 sh $(srctree)/$(src)/checkundef.sh '$(NM)' '$@'
 
-VDSO_LDFLAGS = -shared $(call ld-option, --hash-style=both) \
+VDSO_LDFLAGS = -shared --hash-style=both --build-id \
-	$(call ld-option, --build-id) $(call ld-option, --eh-frame-hdr) \
+	$(call ld-option, --eh-frame-hdr) -Bsymbolic
-	-Bsymbolic
 GCOV_PROFILE := n
 
 quiet_cmd_vdso_and_check = VDSO    $@

drivers/memory/.gitignore

@@ -0,0 +1 @@
+ti-emif-asm-offsets.h

drivers/memory/Makefile

@@ -29,9 +29,10 @@ ti-emif-sram-objs		:= ti-emif-pm.o ti-emif-sram-pm.o
 
 AFLAGS_ti-emif-sram-pm.o	:=-Wa,-march=armv7-a
 
-drivers/memory/ti-emif-sram-pm.o: include/generated/ti-emif-asm-offsets.h
+$(obj)/ti-emif-sram-pm.o: $(obj)/ti-emif-asm-offsets.h
 
-include/generated/ti-emif-asm-offsets.h: drivers/memory/emif-asm-offsets.s FORCE
+$(obj)/ti-emif-asm-offsets.h: $(obj)/emif-asm-offsets.s FORCE
 	$(call filechk,offsets,__TI_EMIF_ASM_OFFSETS_H__)
 
 targets += emif-asm-offsets.s
+clean-files += ti-emif-asm-offsets.h

drivers/memory/ti-emif-sram-pm.S

@@ -14,12 +14,12 @@
  * GNU General Public License for more details.
  */
 
-#include <generated/ti-emif-asm-offsets.h>
 #include <linux/linkage.h>
 #include <asm/assembler.h>
 #include <asm/memory.h>
 
 #include "emif.h"
+#include "ti-emif-asm-offsets.h"
 
 #define EMIF_POWER_MGMT_WAIT_SELF_REFRESH_8192_CYCLES	0x00a0
 #define EMIF_POWER_MGMT_SR_TIMER_MASK			0x00f0

drivers/scsi/Makefile

@@ -185,7 +185,7 @@ zalon7xx-objs	:= zalon.o ncr53c8xx.o
 # Files generated that shall be removed upon make clean
 clean-files :=	53c700_d.h 53c700_u.h scsi_devinfo_tbl.c
 
-$(obj)/53c700.o $(MODVERDIR)/$(obj)/53c700.ver: $(obj)/53c700_d.h
+$(obj)/53c700.o: $(obj)/53c700_d.h
 
 $(obj)/scsi_sysfs.o: $(obj)/scsi_devinfo_tbl.c
 

include/Kbuild

@@ -31,7 +31,7 @@ header-test-			+= acpi/platform/acintel.h
 header-test-			+= acpi/platform/aclinux.h
 header-test-			+= acpi/platform/aclinuxex.h
 header-test-			+= acpi/processor.h
-header-test-			+= clocksource/hyperv_timer.h
+header-test-$(CONFIG_X86)	+= clocksource/hyperv_timer.h
 header-test-			+= clocksource/timer-sp804.h
 header-test-			+= crypto/cast_common.h
 header-test-			+= crypto/internal/cryptouser.h
@@ -246,6 +246,7 @@ header-test-			+= linux/intel-pti.h
 header-test-			+= linux/intel-svm.h
 header-test-			+= linux/interconnect-provider.h
 header-test-			+= linux/ioc3.h
+header-test-$(CONFIG_BLOCK)	+= linux/iomap.h
 header-test-			+= linux/ipack.h
 header-test-			+= linux/irq_cpustat.h
 header-test-			+= linux/irq_poll.h
@@ -454,9 +455,6 @@ header-test-			+= linux/phy/omap_control_phy.h
 header-test-			+= linux/phy/tegra/xusb.h
 header-test-			+= linux/phy/ulpi_phy.h
 header-test-			+= linux/phy_fixed.h
-header-test-			+= linux/pinctrl/pinconf-generic.h
-header-test-			+= linux/pinctrl/pinconf.h
-header-test-			+= linux/pinctrl/pinctrl.h
 header-test-			+= linux/pipe_fs_i.h
 header-test-			+= linux/pktcdvd.h
 header-test-			+= linux/pl320-ipc.h
@@ -905,10 +903,11 @@ header-test-			+= net/netfilter/nf_nat_redirect.h
 header-test-			+= net/netfilter/nf_queue.h
 header-test-			+= net/netfilter/nf_reject.h
 header-test-			+= net/netfilter/nf_synproxy.h
-header-test-			+= net/netfilter/nf_tables.h
+header-test-$(CONFIG_NF_TABLES)	+= net/netfilter/nf_tables.h
-header-test-			+= net/netfilter/nf_tables_core.h
+header-test-$(CONFIG_NF_TABLES)	+= net/netfilter/nf_tables_core.h
-header-test-			+= net/netfilter/nf_tables_ipv4.h
+header-test-$(CONFIG_NF_TABLES)	+= net/netfilter/nf_tables_ipv4.h
 header-test-			+= net/netfilter/nf_tables_ipv6.h
+header-test-$(CONFIG_NF_TABLES)	+= net/netfilter/nf_tables_offload.h
 header-test-			+= net/netfilter/nft_fib.h
 header-test-			+= net/netfilter/nft_meta.h
 header-test-			+= net/netfilter/nft_reject.h
@@ -949,7 +948,6 @@ header-test-			+= pcmcia/ds.h
 header-test-			+= rdma/ib.h
 header-test-			+= rdma/iw_portmap.h
 header-test-			+= rdma/opa_port_info.h
-header-test-			+= rdma/rdma_counter.h
 header-test-			+= rdma/rdmavt_cq.h
 header-test-			+= rdma/restrack.h
 header-test-			+= rdma/signature.h

lib/Kconfig.debug

@@ -353,23 +353,13 @@ config DEBUG_SECTION_MISMATCH
 	  which results in the code/data being placed in specific sections.
 	  The section mismatch analysis is always performed after a full
 	  kernel build, and enabling this option causes the following
-	  additional steps to occur:
+	  additional step to occur:
 	  - Add the option -fno-inline-functions-called-once to gcc commands.
 	    When inlining a function annotated with __init in a non-init
 	    function, we would lose the section information and thus
 	    the analysis would not catch the illegal reference.
 	    This option tells gcc to inline less (but it does result in
 	    a larger kernel).
-	  - Run the section mismatch analysis for each module/built-in.a file.
-	    When we run the section mismatch analysis on vmlinux.o, we
-	    lose valuable information about where the mismatch was
-	    introduced.
-	    Running the analysis for each module/built-in.a file
-	    tells where the mismatch happens much closer to the
-	    source. The drawback is that the same mismatch is
-	    reported at least twice.
-	  - Enable verbose reporting from modpost in order to help resolve
-	    the section mismatches that are reported.
 
 config SECTION_MISMATCH_WARN_ONLY
 	bool "Make section mismatch errors non-fatal"

scripts/Kbuild.include

@@ -125,11 +125,6 @@ CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS))
 cc-option = $(call __cc-option, $(CC),\
 	$(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS),$(1),$(2))
 
-# hostcc-option
-# Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586)
-hostcc-option = $(call __cc-option, $(HOSTCC),\
-	$(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS),$(1),$(2))
-
 # cc-option-yn
 # Usage: flag := $(call cc-option-yn,-march=winchip-c6)
 cc-option-yn = $(call try-run,\

scripts/Makefile.build

@@ -63,14 +63,14 @@ ifneq ($(strip $(real-obj-y) $(need-builtin)),)
 builtin-target := $(obj)/built-in.a
 endif
 
-ifdef CONFIG_MODULES
+ifeq ($(CONFIG_MODULES)$(need-modorder),y1)
 modorder-target := $(obj)/modules.order
 endif
 
-# We keep a list of all modules in $(MODVERDIR)
+mod-targets := $(patsubst %.o, %.mod, $(obj-m))
 
 __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
-	 $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
+	 $(if $(KBUILD_MODULES),$(obj-m) $(mod-targets) $(modorder-target)) \
 	 $(subdir-ym) $(always)
 	@:
 
@@ -87,11 +87,6 @@ ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
   cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $<
 endif
 
-# Do section mismatch analysis for each module/built-in.a
-ifdef CONFIG_DEBUG_SECTION_MISMATCH
-  cmd_secanalysis = ; scripts/mod/modpost $@
-endif
-
 # Compile C sources (.c)
 # ---------------------------------------------------------------------------
 
@@ -268,7 +263,7 @@ endef
 
 # List module undefined symbols (or empty line if not enabled)
 ifdef CONFIG_TRIM_UNUSED_KSYMS
-cmd_undef_syms = $(NM) $@ | sed -n 's/^  *U //p' | xargs echo
+cmd_undef_syms = $(NM) $< | sed -n 's/^  *U //p' | xargs echo
 else
 cmd_undef_syms = echo
 endif
@@ -278,13 +273,15 @@ $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
 	$(call cmd,force_checksrc)
 	$(call if_changed_rule,cc_o_c)
 
-# Single-part modules are special since we need to mark them in $(MODVERDIR)
+cmd_mod = { \
+	echo $(if $($*-objs)$($*-y)$($*-m), $(addprefix $(obj)/, $($*-objs) $($*-y) $($*-m)), $(@:.mod=.o)); \
+	$(cmd_undef_syms); \
+	} > $@
 
-$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
+$(obj)/%.mod: $(obj)/%.o FORCE
-	$(call cmd,force_checksrc)
+	$(call if_changed,mod)
-	$(call if_changed_rule,cc_o_c)
+
-	@{ echo $(@:.o=.ko); echo $@; \
+targets += $(mod-targets)
-	   $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
 
 quiet_cmd_cc_lst_c = MKLST   $@
       cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
@@ -294,7 +291,7 @@ quiet_cmd_cc_lst_c = MKLST   $@
 $(obj)/%.lst: $(src)/%.c FORCE
 	$(call if_changed_dep,cc_lst_c)
 
-# header test (header-test-y target)
+# header test (header-test-y, header-test-m target)
 # ---------------------------------------------------------------------------
 
 quiet_cmd_cc_s_h = CC      $@
@@ -423,13 +420,10 @@ endif # builtin-target
 #
 # Create commands to either record .ko file or cat modules.order from
 # a subdirectory
-modorder-cmds =						\
-	$(foreach m, $(modorder),			\
-		$(if $(filter %/modules.order, $m),	\
-			cat $m;, echo kernel/$m;))
-
 $(modorder-target): $(subdir-ym) FORCE
-	$(Q)(cat /dev/null; $(modorder-cmds)) > $@
+	$(Q){ $(foreach m, $(modorder), \
+	$(if $(filter %/modules.order, $m), cat $m, echo $m);) :; } \
+	| $(AWK) '!x[$$0]++' - > $@
 
 #
 # Rule to compile a set of .o files into one .a file (with symbol table)
@@ -464,12 +458,10 @@ endif
 # module is turned into a multi object module, $^ will contain header file
 # dependencies recorded in the .*.cmd file.
 quiet_cmd_link_multi-m = LD [M]  $@
-cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^) $(cmd_secanalysis)
+      cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^)
 
 $(multi-used-m): FORCE
 	$(call if_changed,link_multi-m)
-	@{ echo $(@:.o=.ko); echo $(filter %.o,$^); \
-	   $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod)
 $(call multi_depend, $(multi-used-m), .o, -objs -y -m)
 
 targets += $(multi-used-m)

scripts/Makefile.lib

@@ -78,7 +78,7 @@ header-test-y	+= $(filter-out $(header-test-), \
 		$(wildcard $(addprefix $(srctree)/$(src)/, \
 		$(header-test-pattern-y)))))
 
-extra-$(CONFIG_HEADER_TEST) += $(addsuffix .s, $(header-test-y))
+extra-$(CONFIG_HEADER_TEST) += $(addsuffix .s, $(header-test-y) $(header-test-m))
 
 # Add subdir path
 

scripts/Makefile.modbuiltin

@@ -40,7 +40,7 @@ __modbuiltin: $(modbuiltin-target) $(subdir-ym)
 	@:
 
 $(modbuiltin-target): $(subdir-ym) FORCE
-	$(Q)(for m in $(modbuiltin-mods); do echo kernel/$$m; done;	\
+	$(Q)(for m in $(modbuiltin-mods); do echo $$m; done;	\
 	cat /dev/null $(modbuiltin-subdirs)) > $@
 
 PHONY += FORCE

scripts/Makefile.modinst

@@ -8,10 +8,7 @@ __modinst:
 
 include scripts/Kbuild.include
 
-#
+modules := $(sort $(shell cat $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)modules.order))
-
-__modules := $(sort $(shell grep -h '\.ko$$' /dev/null $(wildcard $(MODVERDIR)/*.mod)))
-modules := $(patsubst %.o,%.ko,$(wildcard $(__modules:.ko=.o)))
 
 PHONY += $(modules)
 __modinst: $(modules)

scripts/Makefile.modpost

@@ -6,11 +6,12 @@
 # Stage one of module building created the following:
 # a) The individual .o files used for the module
 # b) A <module>.o file which is the .o files above linked together
-# c) A <module>.mod file in $(MODVERDIR)/, listing the name of the
+# c) A <module>.mod file, listing the name of the preliminary <module>.o file,
-#    the preliminary <module>.o file, plus all .o files
+#    plus all .o files
+# d) modules.order, which lists all the modules
 
 # Stage 2 is handled by this file and does the following
-# 1) Find all modules from the files listed in $(MODVERDIR)/
+# 1) Find all modules listed in modules.order
 # 2) modpost is then used to
 # 3)  create one <module>.mod.c file pr. module
 # 4)  create one Module.symvers file with CRC for all exported symbols
@@ -60,10 +61,12 @@ include scripts/Makefile.lib
 kernelsymfile := $(objtree)/Module.symvers
 modulesymfile := $(firstword $(KBUILD_EXTMOD))/Module.symvers
 
-# Step 1), find all modules listed in $(MODVERDIR)/
+modorder := $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)modules.order
-MODLISTCMD := find $(MODVERDIR) -name '*.mod' | xargs -r grep -h '\.ko$$' | sort -u
+
-__modules := $(shell $(MODLISTCMD))
+# Step 1), find all modules listed in modules.order
-modules   := $(patsubst %.o,%.ko, $(wildcard $(__modules:.ko=.o)))
+ifdef CONFIG_MODULES
+modules := $(sort $(shell cat $(modorder)))
+endif
 
 # Stop after building .o files if NOFINAL is set. Makes compile tests quicker
 _modpost: $(if $(KBUILD_MODPOST_NOFINAL), $(modules:.ko:.o),$(modules))
@@ -84,7 +87,7 @@ MODPOST_OPT=$(subst -i,-n,$(filter -i,$(MAKEFLAGS)))
 
 # We can go over command line length here, so be careful.
 quiet_cmd_modpost = MODPOST $(words $(filter-out vmlinux FORCE, $^)) modules
-      cmd_modpost = $(MODLISTCMD) | sed 's/\.ko$$/.o/' | $(modpost) $(MODPOST_OPT) -s -T -
+      cmd_modpost = sed 's/ko$$/o/' $(modorder) | $(modpost) $(MODPOST_OPT) -s -T -
 
 PHONY += __modpost
 __modpost: $(modules:.ko=.o) FORCE

scripts/Makefile.modsign

@@ -8,8 +8,7 @@ __modsign:
 
 include scripts/Kbuild.include
 
-__modules := $(sort $(shell grep -h '\.ko$$' /dev/null $(wildcard $(MODVERDIR)/*.mod)))
+modules := $(sort $(shell cat modules.order))
-modules := $(patsubst %.o,%.ko,$(wildcard $(__modules:.ko=.o)))
 
 PHONY += $(modules)
 __modsign: $(modules)

scripts/adjust_autoksyms.sh

@@ -8,8 +8,7 @@
 #
 
 # Create/update the include/generated/autoksyms.h file from the list
-# of all module's needed symbols as recorded on the third line of
+# of all module's needed symbols as recorded on the second line of *.mod files.
-# .tmp_versions/*.mod files.
 #
 # For each symbol being added or removed, the corresponding dependency
 # file's timestamp is updated to force a rebuild of the affected source
@@ -47,13 +46,10 @@ cat > "$new_ksyms_file" << EOT
  */
 
 EOT
-[ "$(ls -A "$MODVERDIR")" ] &&
+sed 's/ko$/mod/' modules.order |
-for mod in "$MODVERDIR"/*.mod; do
+xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- |
-	sed -n -e '3{s/ /\n/g;/^$/!p;}' "$mod"
+sort -u |
-done | sort -u |
+sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$new_ksyms_file"
-while read sym; do
-	echo "#define __KSYM_${sym} 1"
-done >> "$new_ksyms_file"
 
 # Special case for modversions (see modpost.c)
 if [ -n "$CONFIG_MODVERSIONS" ]; then

scripts/coccinelle/api/devm_platform_ioremap_resource.cocci

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+/// Use devm_platform_ioremap_resource helper which wraps
+/// platform_get_resource() and devm_ioremap_resource() together.
+///
+// Confidence: High
+// Copyright: (C) 2019 Himanshu Jha GPLv2.
+// Copyright: (C) 2019 Julia Lawall, Inria/LIP6. GPLv2.
+// Keywords: platform_get_resource, devm_ioremap_resource,
+// Keywords: devm_platform_ioremap_resource
+
+virtual patch
+virtual report
+
+@r depends on patch && !report@
+expression e1, e2, arg1, arg2, arg3;
+identifier id;
+@@
+
+(
+- id = platform_get_resource(arg1, IORESOURCE_MEM, arg2);
+|
+- struct resource *id = platform_get_resource(arg1, IORESOURCE_MEM, arg2);
+)
+  ... when != id
+- e1 = devm_ioremap_resource(arg3, id);
++ e1 = devm_platform_ioremap_resource(arg1, arg2);
+  ... when != id
+? id = e2
+
+@r1 depends on patch && !report@
+identifier r.id;
+type T;
+@@
+
+- T *id;
+  ...when != id
+
+@r2 depends on report && !patch@
+identifier id;
+expression e1, e2, arg1, arg2, arg3;
+position j0;
+@@
+
+(
+  id = platform_get_resource(arg1, IORESOURCE_MEM, arg2);
+|
+  struct resource *id = platform_get_resource(arg1, IORESOURCE_MEM, arg2);
+)
+  ... when != id
+  e1@j0 = devm_ioremap_resource(arg3, id);
+  ... when != id
+? id = e2
+
+@script:python depends on report && !patch@
+e1 << r2.e1;
+j0 << r2.j0;
+@@
+
+msg = "WARNING: Use devm_platform_ioremap_resource for %s" % (e1)
+coccilib.report.print_report(j0[0], msg)

scripts/export_report.pl

@@ -52,13 +52,12 @@ sub usage {
 
 sub collectcfiles {
     my @file;
-    while (<.tmp_versions/*.mod>) {
+    open my $fh, '< modules.order' or die "cannot open modules.order: $!\n";
-	open my $fh, '<', $_ or die "cannot open $_: $!\n";
+    while (<$fh>) {
-	push (@file,
+	s/\.ko$/.mod.c/;
-	      grep s/\.ko/.mod.c/,	# change the suffix
+	push (@file, $_)
-	      grep m/.+\.ko/,		# find the .ko path
-	      <$fh>);			# lines in opened file
     }
+    close($fh);
     chomp @file;
     return @file;
 }

scripts/kconfig/Makefile

@@ -94,7 +94,7 @@ configfiles=$(wildcard $(srctree)/kernel/configs/$@ $(srctree)/arch/$(SRCARCH)/c
 %.config: $(obj)/conf
 	$(if $(call configfiles),, $(error No configuration exists for this target on this architecture))
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m .config $(configfiles)
-	+$(Q)yes "" | $(MAKE) -f $(srctree)/Makefile oldconfig
+	$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 
 PHONY += kvmconfig
 kvmconfig: kvm_guest.config

scripts/kconfig/confdata.c

@@ -895,7 +895,8 @@ int conf_write(const char *name)
 				     "# %s\n"
 				     "#\n", str);
 			need_newline = false;
-		} else if (!(sym->flags & SYMBOL_CHOICE)) {
+		} else if (!(sym->flags & SYMBOL_CHOICE) &&
+			   !(sym->flags & SYMBOL_WRITTEN)) {
 			sym_calc_value(sym);
 			if (!(sym->flags & SYMBOL_WRITE))
 				goto next;
@@ -903,7 +904,7 @@ int conf_write(const char *name)
 				fprintf(out, "\n");
 				need_newline = false;
 			}
-			sym->flags &= ~SYMBOL_WRITE;
+			sym->flags |= SYMBOL_WRITTEN;
 			conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
 		}
 
@@ -1063,8 +1064,6 @@ int conf_write_autoconf(int overwrite)
 	if (!overwrite && is_present(autoconf_name))
 		return 0;
 
-	sym_clear_all_valid();
-
 	conf_write_dep("include/config/auto.conf.cmd");
 
 	if (conf_touch_deps())

scripts/kconfig/expr.h

@@ -141,6 +141,7 @@ struct symbol {
 #define SYMBOL_OPTIONAL   0x0100  /* choice is optional - values can be 'n' */
 #define SYMBOL_WRITE      0x0200  /* write symbol to file (KCONFIG_CONFIG) */
 #define SYMBOL_CHANGED    0x0400  /* ? */
+#define SYMBOL_WRITTEN    0x0800  /* track info to avoid double-write to .config */
 #define SYMBOL_NO_WRITE   0x1000  /* Symbol for internal use only; it will not be written */
 #define SYMBOL_CHECKED    0x2000  /* used during dependency checking */
 #define SYMBOL_WARNED     0x8000  /* warning has been issued */

scripts/mod/sumversion.c

@@ -396,34 +396,19 @@ void get_src_version(const char *modname, char sum[], unsigned sumlen)
 	unsigned long len;
 	struct md4_ctx md;
 	char *sources, *end, *fname;
-	const char *basename;
 	char filelist[PATH_MAX + 1];
-	char *modverdir = getenv("MODVERDIR");
 
-	if (!modverdir)
+	/* objects for a module are listed in the first line of *.mod file. */
-		modverdir = ".";
+	snprintf(filelist, sizeof(filelist), "%.*smod",
-
+		 (int)strlen(modname) - 1, modname);
-	/* Source files for module are in .tmp_versions/modname.mod,
-	   after the first line. */
-	if (strrchr(modname, '/'))
-		basename = strrchr(modname, '/') + 1;
-	else
-		basename = modname;
-	snprintf(filelist, sizeof(filelist), "%s/%.*s.mod", modverdir,
-		(int) strlen(basename) - 2, basename);
 
 	file = grab_file(filelist, &len);
 	if (!file)
 		/* not a module or .mod file missing - ignore */
 		return;
 
-	sources = strchr(file, '\n');
+	sources = file;
-	if (!sources) {
-		warn("malformed versions file for %s\n", modname);
-		goto release;
-	}
 
-	sources++;
 	end = strchr(sources, '\n');
 	if (!end) {
 		warn("bad ending versions file for %s\n", modname);

scripts/modules-check.sh

@@ -9,7 +9,7 @@ check_same_name_modules()
 	for m in $(sed 's:.*/::' modules.order | sort | uniq -d)
 	do
 		echo "warning: same module names found:" >&2
-		sed -n "/\/$m/s:^kernel/:  :p" modules.order >&2
+		sed -n "/\/$m/s:^:  :p" modules.order >&2
 	done
 }
 

scripts/package/builddeb

@@ -132,6 +132,11 @@ fi
 if [ "$ARCH" != "um" ]; then
 	$MAKE -f $srctree/Makefile headers
 	$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH="$libc_headers_dir/usr"
+	# move asm headers to /usr/include/<libc-machine>/asm to match the structure
+	# used by Debian-based distros (to support multi-arch)
+	host_arch=$(dpkg-architecture -a$(cat debian/arch) -qDEB_HOST_MULTIARCH)
+	mkdir $libc_headers_dir/usr/include/$host_arch
+	mv $libc_headers_dir/usr/include/asm $libc_headers_dir/usr/include/$host_arch/
 fi
 
 # Install the maintainer scripts

scripts/package/mkdebian

@@ -197,6 +197,7 @@ Architecture: $debarch
 Description: Linux support headers for userspace development
  This package provides userspaces headers from the Linux kernel.  These headers
  are used by the installed headers for GNU glibc and other system libraries.
+Multi-Arch: same
 
 Package: $dbg_packagename
 Section: debug

scripts/package/mkspec

@@ -29,7 +29,7 @@ fi
 
 PROVIDES="$PROVIDES kernel-$KERNELRELEASE"
 __KERNELRELEASE=$(echo $KERNELRELEASE | sed -e "s/-/_/g")
-EXCLUDES="$RCS_TAR_IGNORE --exclude=.tmp_versions --exclude=*vmlinux* \
+EXCLUDES="$RCS_TAR_IGNORE --exclude=*vmlinux* --exclude=*.mod \
 --exclude=*.o --exclude=*.ko --exclude=*.cmd --exclude=Documentation \
 --exclude=.config.old --exclude=.missing-syscalls.d --exclude=*.s"
 

tools/power/cpupower/debug/kernel/Makefile

@@ -12,8 +12,8 @@ default:
 	$(MAKE) -C $(KDIR) M=$(CURDIR)
 
 clean:
-	- rm -rf *.o *.ko .tmp-versions .*.cmd .*.mod.* *.mod.c
+	- rm -rf *.o *.ko .*.cmd .*.mod.* *.mod.c
-	- rm -rf .tmp_versions* Module.symvers modules.order
+	- rm -rf Module.symvers modules.order
 
 install: default
 	install -d $(KMISC)

usr/include/Makefile

@@ -30,8 +30,6 @@ header-test-$(CONFIG_CPU_BIG_ENDIAN) += linux/byteorder/big_endian.h
 header-test-$(CONFIG_CPU_LITTLE_ENDIAN) += linux/byteorder/little_endian.h
 header-test- += linux/coda.h
 header-test- += linux/coda_psdev.h
-header-test- += linux/dvb/audio.h
-header-test- += linux/dvb/osd.h
 header-test- += linux/elfcore.h
 header-test- += linux/errqueue.h
 header-test- += linux/fsmap.h
@@ -44,7 +42,6 @@ header-test- += linux/netfilter_bridge/ebtables.h
 header-test- += linux/netfilter_ipv4/ipt_LOG.h
 header-test- += linux/netfilter_ipv6/ip6t_LOG.h
 header-test- += linux/nfc.h
-header-test- += linux/nilfs2_ondisk.h
 header-test- += linux/omap3isp.h
 header-test- += linux/omapfb.h
 header-test- += linux/patchkey.h
@@ -59,9 +56,6 @@ header-test- += linux/v4l2-mediabus.h
 header-test- += linux/v4l2-subdev.h
 header-test- += linux/videodev2.h
 header-test- += linux/vm_sockets.h
-header-test- += misc/ocxl.h
-header-test- += mtd/mtd-abi.h
-header-test- += mtd/mtd-user.h
 header-test- += scsi/scsi_bsg_fc.h
 header-test- += scsi/scsi_netlink.h
 header-test- += scsi/scsi_netlink_fc.h
@@ -108,7 +102,6 @@ header-test- += linux/bpf_perf_event.h
 endif
 
 ifeq ($(SRCARCH),s390)
-header-test- += asm/runtime_instr.h
 header-test- += asm/zcrypt.h
 endif
 
@@ -116,7 +109,6 @@ ifeq ($(SRCARCH),sparc)
 header-test- += asm/stat.h
 header-test- += asm/uctx.h
 header-test- += asm/fbio.h
-header-test- += asm/openpromio.h
 endif
 
 # asm-generic/*.h is used by asm/*.h, and should not be included directly