Merge tag 'kbuild-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Add support for the EXPORT_SYMBOL_GPL_FOR_MODULES() macro, which
   exports a symbol only to specified modules

 - Improve ABI handling in gendwarfksyms

 - Forcibly link lib-y objects to vmlinux even if CONFIG_MODULES=n

 - Add checkers for redundant or missing <linux/export.h> inclusion

 - Deprecate the extra-y syntax

 - Fix a genksyms bug when including enum constants from *.symref files

* tag 'kbuild-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (28 commits)
  genksyms: Fix enum consts from a reference affecting new values
  arch: use always-$(KBUILD_BUILTIN) for vmlinux.lds
  kbuild: set y instead of 1 to KBUILD_{BUILTIN,MODULES}
  efi/libstub: use 'targets' instead of extra-y in Makefile
  module: make __mod_device_table__* symbols static
  scripts/misc-check: check unnecessary #include <linux/export.h> when W=1
  scripts/misc-check: check missing #include <linux/export.h> when W=1
  scripts/misc-check: add double-quotes to satisfy shellcheck
  kbuild: move W=1 check for scripts/misc-check to top-level Makefile
  scripts/tags.sh: allow to use alternative ctags implementation
  kconfig: introduce menu type enum
  docs: symbol-namespaces: fix reST warning with literal block
  kbuild: link lib-y objects to vmlinux forcibly even when CONFIG_MODULES=n
  tinyconfig: enable CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
  docs/core-api/symbol-namespaces: drop table of contents and section numbering
  modpost: check forbidden MODULE_IMPORT_NS("module:") at compile time
  kbuild: move kbuild syntax processing to scripts/Makefile.build
  Makefile: remove dependency on archscripts for header installation
  Documentation/kbuild: Add new gendwarfksyms kABI rules
  Documentation/kbuild: Drop section numbers
  ...

1 files changed, 13 insertions, 15 deletions

diff --git a/Makefile b/Makefile
index 3244c2a519e2..f48cf61181f7 100644
--- a/Makefile
+++ b/Makefile
@@ -754,7 +754,7 @@ targets :=
 # Normally, just do built-in.
 
 KBUILD_MODULES :=
-KBUILD_BUILTIN := 1
+KBUILD_BUILTIN := y
 
 # If we have only "make modules", don't compile built-in objects.
 ifeq ($(MAKECMDGOALS),modules)
@@ -766,11 +766,11 @@ endif
 # Just "make" or "make all" shall build modules as well
 
 ifneq ($(filter all modules nsdeps compile_commands.json clang-%,$(MAKECMDGOALS)),)
-  KBUILD_MODULES := 1
+  KBUILD_MODULES := y
 endif
 
 ifeq ($(MAKECMDGOALS),)
-  KBUILD_MODULES := 1
+  KBUILD_MODULES := y
 endif
 
 export KBUILD_MODULES KBUILD_BUILTIN
@@ -1189,13 +1189,8 @@ export ARCH_LIB		:= $(filter %/, $(libs-y))
 export ARCH_DRIVERS	:= $(drivers-y) $(drivers-m)
 # Externally visible symbols (used by link-vmlinux.sh)
 
-KBUILD_VMLINUX_OBJS := ./built-in.a
-ifdef CONFIG_MODULES
-KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
+KBUILD_VMLINUX_OBJS := built-in.a $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
-else
-KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
-endif
 
 export KBUILD_VMLINUX_LIBS
 export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
@@ -1203,7 +1198,7 @@ export KBUILD_LDS          := arch/$(SRCARCH)/kernel/vmlinux.lds
 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.
-KBUILD_MODULES := 1
+KBUILD_MODULES := y
 endif
 
 # '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14
@@ -1370,7 +1365,7 @@ PHONY += archheaders archscripts
 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
 
 PHONY += headers
-headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
+headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders
 ifdef HEADER_ARCH
 	$(Q)$(MAKE) -f $(srctree)/Makefile HEADER_ARCH= SRCARCH=$(HEADER_ARCH) headers
 else
@@ -1543,7 +1538,7 @@ all: modules
 # 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
+  KBUILD_BUILTIN := y
 endif
 
 # Build modules
@@ -1552,7 +1547,7 @@ endif
 # *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFO_BTF_MODULES
 # is an exception.
 ifdef CONFIG_DEBUG_INFO_BTF_MODULES
-KBUILD_BUILTIN := 1
+KBUILD_BUILTIN := y
 modules: vmlinux
 endif
 
@@ -1837,9 +1832,12 @@ rustfmtcheck: rustfmt
 # Misc
 # ---------------------------------------------------------------------------
 
+# Run misc checks when ${KBUILD_EXTRA_WARN} contains 1
 PHONY += misc-check
+ifneq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
 misc-check:
 	$(Q)$(srctree)/scripts/misc-check
+endif
 
 all: misc-check
 
@@ -1865,7 +1863,7 @@ filechk_kernel.release = echo $(KERNELRELEASE)
 
 # We are always building only modules.
 KBUILD_BUILTIN :=
-KBUILD_MODULES := 1
+KBUILD_MODULES := y
 
 build-dir := .
 
@@ -1993,7 +1991,7 @@ endif
 
 single-goals := $(addprefix $(build-dir)/, $(single-no-ko))
 
-KBUILD_MODULES := 1
+KBUILD_MODULES := y
 
 endif