add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/Makefile
..
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@@ -1,7 +1,7 @@
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 # SPDX-License-Identifier: GPL-2.0
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 VERSION = 5
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 PATCHLEVEL = 10
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-SUBLEVEL = 160
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+SUBLEVEL = 198
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 EXTRAVERSION =
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 NAME = Dare mighty things
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7
 
..
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@@ -93,9 +93,16 @@
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 # If the user is running make -s (silent mode), suppress echoing of
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 # commands
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+# make-4.0 (and later) keep single letter options in the 1st word of MAKEFLAGS.
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-ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
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-  quiet=silent_
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+ifeq ($(filter 3.%,$(MAKE_VERSION)),)
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+silence:=$(findstring s,$(firstword -$(MAKEFLAGS)))
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+else
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+silence:=$(findstring s,$(filter-out --%,$(MAKEFLAGS)))
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+endif
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+
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+ifeq ($(silence),s)
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+quiet=silent_
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 endif
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 export quiet Q KBUILD_VERBOSE
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@@ -597,8 +604,10 @@
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 ifneq ($(GCC_TOOLCHAIN),)
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 CLANG_FLAGS	+= --gcc-toolchain=$(GCC_TOOLCHAIN)
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 endif
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-ifneq ($(LLVM_IAS),1)
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-CLANG_FLAGS	+= -no-integrated-as
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+ifeq ($(LLVM_IAS),1)
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+CLANG_FLAGS	+= -fintegrated-as
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+else
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+CLANG_FLAGS	+= -fno-integrated-as
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 endif
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 CLANG_FLAGS	+= -Werror=unknown-warning-option
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 KBUILD_CFLAGS	+= $(CLANG_FLAGS)
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@@ -828,6 +837,10 @@
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 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
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 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
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+
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+# These result in bogus false positives
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+KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer)
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+
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 ifdef CONFIG_FRAME_POINTER
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 KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
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 else
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@@ -871,7 +884,7 @@
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 DEBUG_CFLAGS	+= -g
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 endif
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-ifeq ($(LLVM_IAS),1)
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+ifdef CONFIG_AS_IS_LLVM
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 KBUILD_AFLAGS	+= -g
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 else
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 KBUILD_AFLAGS	+= -Wa,-gdwarf-2
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@@ -1519,9 +1532,7 @@
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 PHONY += modules
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 # if KBUILD_BUILTIN && !KBUILD_MIXED_TREE, depend on vmlinux
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-modules: $(if $(KBUILD_BUILTIN), $(if $(KBUILD_MIXED_TREE),,vmlinux))
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-modules: modules_check modules_prepare
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-	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
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+modules: $(if $(KBUILD_BUILTIN), $(if $(KBUILD_MIXED_TREE),,vmlinux)) modules_check modules_prepare
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 PHONY += modules_check
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 modules_check: modules.order
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@@ -1539,12 +1550,9 @@
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 modules_prepare: prepare
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 	$(Q)$(MAKE) $(build)=scripts scripts/module.lds
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-# Target to install modules
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-PHONY += modules_install
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-modules_install: _modinst_ _modinst_post
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-
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-PHONY += _modinst_
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-_modinst_:
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+modules_install: __modinst_pre
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+PHONY += __modinst_pre
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+__modinst_pre:
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 	@rm -rf $(MODLIB)/kernel
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 	@rm -f $(MODLIB)/source
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 	@mkdir -p $(MODLIB)/kernel
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@@ -1556,34 +1564,12 @@
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 	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
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 	@cp -f $(mixed-build-prefix)modules.builtin $(MODLIB)/
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 	@cp -f $(or $(mixed-build-prefix),$(objtree)/)modules.builtin.modinfo $(MODLIB)/
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-	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
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-
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-# This depmod is only for convenience to give the initial
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-# boot a modules.dep even before / is mounted read-write.  However the
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-# boot script depmod is the master version.
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-PHONY += _modinst_post
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-_modinst_post: _modinst_
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-	$(call cmd,depmod)
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 ifeq ($(CONFIG_MODULE_SIG), y)
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 PHONY += modules_sign
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 modules_sign:
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 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
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 endif
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-
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-else # CONFIG_MODULES
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-
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-# Modules not configured
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-# ---------------------------------------------------------------------------
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-
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-PHONY += modules modules_install
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-modules modules_install:
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-	@echo >&2
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-	@echo >&2 "The present kernel configuration has modules disabled."
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-	@echo >&2 "Type 'make config' and enable loadable module support."
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-	@echo >&2 "Then build a kernel with module support enabled."
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-	@echo >&2
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-	@exit 1
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 endif # CONFIG_MODULES
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@@ -1832,25 +1818,8 @@
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 KBUILD_MODULES := 1
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 build-dirs := $(KBUILD_EXTMOD)
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-PHONY += modules
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-modules: $(MODORDER)
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-	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
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-
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 $(MODORDER): descend
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 	@:
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-
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-PHONY += modules_install
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-modules_install: _emodinst_ _emodinst_post
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-
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-install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
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-PHONY += _emodinst_
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-_emodinst_:
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-	$(Q)mkdir -p $(MODLIB)/$(install-dir)
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-	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
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-
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-PHONY += _emodinst_post
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-_emodinst_post: _emodinst_
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-	$(call cmd,depmod)
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 compile_commands.json: $(extmod-prefix)compile_commands.json
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 PHONY += compile_commands.json
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@@ -1876,6 +1845,41 @@
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 endif # KBUILD_EXTMOD
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+# ---------------------------------------------------------------------------
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+# Modules
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+
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+PHONY += modules modules_install
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+
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+ifdef CONFIG_MODULES
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+
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+modules: $(MODORDER)
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+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
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+
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+quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
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+      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
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+                   $(KERNELRELEASE) $(mixed-build-prefix)
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+
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+modules_install:
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+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
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+	$(call cmd,depmod)
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+
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+else # CONFIG_MODULES
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+
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+# Modules not configured
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+# ---------------------------------------------------------------------------
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+
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+modules modules_install:
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+	@echo >&2 '***'
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+	@echo >&2 '*** The present kernel configuration has modules disabled.'
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+	@echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
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+	@echo >&2 '*** to enable CONFIG_MODULES.'
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+	@echo >&2 '***'
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+	@exit 1
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+
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+KBUILD_MODULES :=
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+
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+endif # CONFIG_MODULES
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+
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 # Single targets
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 # ---------------------------------------------------------------------------
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 # To build individual files in subdirectories, you can do like this:
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@@ -1899,18 +1903,12 @@
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 $(single-no-ko): descend
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 	@:
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-ifeq ($(KBUILD_EXTMOD),)
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-# For the single build of in-tree modules, use a temporary file to avoid
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-# the situation of modules_install installing an invalid modules.order.
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-MODORDER := .modules.tmp
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-endif
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-
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+# Remove MODORDER when done because it is not the real one.
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 PHONY += single_modpost
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 single_modpost: $(single-no-ko) modules_prepare
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 	$(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
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 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
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-
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-KBUILD_MODULES := 1
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+	$(Q)rm -f $(MODORDER)
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 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
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@@ -1918,10 +1916,6 @@
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 build-dirs := $(foreach d, $(build-dirs), \
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 			$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
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-endif
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-
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-ifndef CONFIG_MODULES
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-KBUILD_MODULES :=
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 endif
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 # Handle descending into subdirectories listed in $(build-dirs)
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@@ -2064,11 +2058,6 @@
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 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
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       cmd_rmfiles = rm -rf $(rm-files)
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-
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-# Run depmod only if we have System.map and depmod is executable
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-quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
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-      cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
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-                   $(KERNELRELEASE) $(mixed-build-prefix)
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 # read saved command lines for existing targets
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 existing-targets := $(wildcard $(sort $(targets)))