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Kbuild updates for v5.15 

- Add -s option (strict mode) to merge_config.sh to make it fail when
    any symbol is redefined.
 
  - Show a warning if a different compiler is used for building external
    modules.
 
  - Infer --target from ARCH for CC=clang to let you cross-compile the
    kernel without CROSS_COMPILE.
 
  - Make the integrated assembler default (LLVM_IAS=1) for CC=clang.
 
  - Add <linux/stdarg.h> to the kernel source instead of borrowing
    <stdarg.h> from the compiler.
 
  - Add Nick Desaulniers as a Kbuild reviewer.
 
  - Drop stale cc-option tests.
 
  - Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG
    to handle symbols in inline assembly.
 
  - Show a warning if 'FORCE' is missing for if_changed rules.
 
  - Various cleanups
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Merge tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Add -s option (strict mode) to merge_config.sh to make it fail when
   any symbol is redefined.

 - Show a warning if a different compiler is used for building external
   modules.

 - Infer --target from ARCH for CC=clang to let you cross-compile the
   kernel without CROSS_COMPILE.

 - Make the integrated assembler default (LLVM_IAS=1) for CC=clang.

 - Add <linux/stdarg.h> to the kernel source instead of borrowing
   <stdarg.h> from the compiler.

 - Add Nick Desaulniers as a Kbuild reviewer.

 - Drop stale cc-option tests.

 - Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG
   to handle symbols in inline assembly.

 - Show a warning if 'FORCE' is missing for if_changed rules.

 - Various cleanups

* tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits)
  kbuild: redo fake deps at include/ksym/*.h
  kbuild: clean up objtool_args slightly
  modpost: get the *.mod file path more simply
  checkkconfigsymbols.py: Fix the '--ignore' option
  kbuild: merge vmlinux_link() between ARCH=um and other architectures
  kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh
  kbuild: merge vmlinux_link() between the ordinary link and Clang LTO
  kbuild: remove stale *.symversions
  kbuild: remove unused quiet_cmd_update_lto_symversions
  gen_compile_commands: extract compiler command from a series of commands
  x86: remove cc-option-yn test for -mtune=
  arc: replace cc-option-yn uses with cc-option
  s390: replace cc-option-yn uses with cc-option
  ia64: move core-y in arch/ia64/Makefile to arch/ia64/Kbuild
  sparc: move the install rule to arch/sparc/Makefile
  security: remove unneeded subdir-$(CONFIG_...)
  kbuild: sh: remove unused install script
  kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y
  kbuild: Switch to 'f' variants of integrated assembler flag
  kbuild: Shuffle blank line to improve comment meaning
  ...
This commit is contained in:
Linus Torvalds 2021-09-03 15:33:47 -07:00
parent 4e71add028 bc7cd2dd1f
commit b250e6d141
101 changed files with 305 additions and 349 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
Documentation/kbuild/llvm.rst
View File

@ -38,7 +38,7 @@ Cross Compiling
A single Clang compiler binary will typically contain all supported backends,
which can help simplify cross compiling. ::
ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make CC=clang
make ARCH=arm64 CC=clang CROSS_COMPILE=aarch64-linux-gnu-
``CROSS_COMPILE`` is not used to prefix the Clang compiler binary, instead
``CROSS_COMPILE`` is used to set a command line flag: ``--target=<triple>``. For
@ -60,8 +60,27 @@ They can be enabled individually. The full list of the parameters: ::
OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump READELF=llvm-readelf \
HOSTCC=clang HOSTCXX=clang++ HOSTAR=llvm-ar HOSTLD=ld.lld
Currently, the integrated assembler is disabled by default. You can pass
``LLVM_IAS=1`` to enable it.
The integrated assembler is enabled by default. You can pass ``LLVM_IAS=0`` to
disable it.
Omitting CROSS_COMPILE
----------------------
As explained above, ``CROSS_COMPILE`` is used to set ``--target=<triple>``.
If ``CROSS_COMPILE`` is not specified, the ``--target=<triple>`` is inferred
from ``ARCH``.
That means if you use only LLVM tools, ``CROSS_COMPILE`` becomes unnecessary.
For example, to cross-compile the arm64 kernel::
make ARCH=arm64 LLVM=1
If ``LLVM_IAS=0`` is specified, ``CROSS_COMPILE`` is also used to derive
``--prefix=<path>`` to search for the GNU assembler and linker. ::
make ARCH=arm64 LLVM=1 LLVM_IAS=0 CROSS_COMPILE=aarch64-linux-gnu-
Supported Architectures
-----------------------

2
MAINTAINERS
View File

@ -4532,6 +4532,7 @@ B: https://github.com/ClangBuiltLinux/linux/issues
C: irc://irc.libera.chat/clangbuiltlinux
F: Documentation/kbuild/llvm.rst
F: include/linux/compiler-clang.h
F: scripts/Makefile.clang
F: scripts/clang-tools/
K: \b(?i:clang|llvm)\b
@ -10116,6 +10117,7 @@ F: fs/autofs/
KERNEL BUILD + files below scripts/ (unless maintained elsewhere)
M: Masahiro Yamada <masahiroy@kernel.org>
M: Michal Marek <michal.lkml@markovi.net>
R: Nick Desaulniers <ndesaulniers@google.com>
L: linux-kbuild@vger.kernel.org
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git

90
Makefile
View File

@ -191,10 +191,9 @@ 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.
# --included-dir is added for backward compatibility, but you should not rely on
# it. Please add $(srctree)/ prefix to include Makefiles in the source tree.
MAKEFLAGS += --include-dir=$(abs_srctree)
need-sub-make := 1
endif
ifneq ($(filter 3.%,$(MAKE_VERSION)),)
@ -587,23 +586,10 @@ endif
# 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 = $(subst $(pound),,$(shell $(CC) --version 2>/dev/null | head -n 1))
CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
ifneq ($(CROSS_COMPILE),)
CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
endif
ifeq ($(LLVM_IAS),1)
CLANG_FLAGS += -integrated-as
else
CLANG_FLAGS += -no-integrated-as
GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
endif
CLANG_FLAGS += -Werror=unknown-warning-option
KBUILD_CFLAGS += $(CLANG_FLAGS)
KBUILD_AFLAGS += $(CLANG_FLAGS)
export CLANG_FLAGS
include $(srctree)/scripts/Makefile.clang
endif
# Include this also for config targets because some architectures need
@ -688,9 +674,10 @@ endif # KBUILD_EXTMOD
# Defaults to vmlinux, but the arch makefile usually adds further targets
all: vmlinux
CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
$(call cc-option,-fno-tree-loop-im) \
$(call cc-disable-warning,maybe-uninitialized,)
CFLAGS_GCOV := -fprofile-arcs -ftest-coverage
ifdef CONFIG_CC_IS_GCC
CFLAGS_GCOV += -fno-tree-loop-im
endif
export CFLAGS_GCOV
# The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
@ -698,12 +685,14 @@ 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)))
ifdef CONFIG_CC_IS_GCC
RETPOLINE_CFLAGS := $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register)
RETPOLINE_VDSO_CFLAGS := $(call cc-option,-mindirect-branch=thunk-inline -mindirect-branch-register)
endif
ifdef CONFIG_CC_IS_CLANG
RETPOLINE_CFLAGS := -mretpoline-external-thunk
RETPOLINE_VDSO_CFLAGS := -mretpoline
endif
export RETPOLINE_CFLAGS
export RETPOLINE_VDSO_CFLAGS
@ -756,7 +745,7 @@ include/config/auto.conf:
endif # may-sync-config
endif # need-config
KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
KBUILD_CFLAGS += -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)
@ -771,17 +760,19 @@ KBUILD_CFLAGS += -Os
endif
# Tell gcc to never replace conditional load with a non-conditional one
ifdef CONFIG_CC_IS_GCC
# gcc-10 renamed --param=allow-store-data-races=0 to
# -fno-allow-store-data-races.
KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
endif
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,) \
$(call cc-option,-fno-partial-inlining)
KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
endif
ifneq ($(CONFIG_FRAME_WARN),0)
@ -796,7 +787,7 @@ KBUILD_CFLAGS += $(stackp-flags-y)
ifdef CONFIG_CC_IS_CLANG
KBUILD_CPPFLAGS += -Qunused-arguments
KBUILD_CFLAGS += -Wno-format-invalid-specifier
# The kernel builds with '-std=gnu89' so use of GNU extensions is acceptable.
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.
@ -813,8 +804,8 @@ 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 += $(call cc-disable-warning, unused-const-variable)
ifdef CONFIG_FRAME_POINTER
KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
else
@ -867,7 +858,7 @@ else
DEBUG_CFLAGS += -g
endif
ifneq ($(LLVM_IAS),1)
ifndef CONFIG_AS_IS_LLVM
KBUILD_AFLAGS += -Wa,-gdwarf-2
endif
@ -878,8 +869,10 @@ DEBUG_CFLAGS += -gdwarf-$(dwarf-version-y)
endif
ifdef CONFIG_DEBUG_INFO_REDUCED
DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
$(call cc-option,-fno-var-tracking)
DEBUG_CFLAGS += -fno-var-tracking
ifdef CONFIG_CC_IS_GCC
DEBUG_CFLAGS += -femit-struct-debug-baseonly
endif
endif
ifdef CONFIG_DEBUG_INFO_COMPRESSED
@ -913,6 +906,7 @@ ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
endif
endif
ifdef CONFIG_HAVE_FENTRY
# s390-linux-gnu-gcc did not support -mfentry until gcc-9.
ifeq ($(call cc-option-yn, -mfentry),y)
CC_FLAGS_FTRACE += -mfentry
CC_FLAGS_USING += -DCC_USING_FENTRY
@ -925,7 +919,7 @@ endif
# We trigger additional mismatches with less inlining
ifdef CONFIG_DEBUG_SECTION_MISMATCH
KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
KBUILD_CFLAGS += -fno-inline-functions-called-once
endif
ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
@ -1004,14 +998,16 @@ 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 += -Wno-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)
ifdef CONFIG_CC_IS_GCC
KBUILD_CFLAGS += -Wno-maybe-uninitialized
endif
# disable invalid "can't wrap" optimizations for signed / pointers
KBUILD_CFLAGS += -fno-strict-overflow
@ -1020,7 +1016,9 @@ KBUILD_CFLAGS += -fno-strict-overflow
KBUILD_CFLAGS += -fno-stack-check
# conserve stack if available
KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
ifdef CONFIG_CC_IS_GCC
KBUILD_CFLAGS += -fconserve-stack
endif
# Prohibit date/time macros, which would make the build non-deterministic
KBUILD_CFLAGS += -Werror=date-time
@ -1750,6 +1748,16 @@ 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 += prepare
# now expand this into a simple variable to reduce the cost of shell evaluations
prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
prepare:
@if [ "$(CC_VERSION_TEXT)" != $(CONFIG_CC_VERSION_TEXT) ]; then \
echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
echo >&2 " The kernel was built by: "$(CONFIG_CC_VERSION_TEXT); \
echo >&2 " You are using: $(CC_VERSION_TEXT)"; \
fi
PHONY += help
help:
@echo ' Building external modules.'
@ -1761,7 +1769,7 @@ help:
@echo ''
# no-op for external module builds
PHONY += prepare modules_prepare
PHONY += modules_prepare
endif # KBUILD_EXTMOD

3
arch/arc/Makefile
View File

@ -18,8 +18,7 @@ ifeq ($(CONFIG_ARC_TUNE_MCPU),"")
cflags-y += $(tune-mcpu-def-y)
else
tune-mcpu := $(shell echo $(CONFIG_ARC_TUNE_MCPU))
tune-mcpu-ok := $(call cc-option-yn, $(tune-mcpu))
ifeq ($(tune-mcpu-ok),y)
ifneq ($(call cc-option,$(tune-mcpu)),)
cflags-y += $(tune-mcpu)
else
# The flag provided by 'CONFIG_ARC_TUNE_MCPU' option isn't known by this compiler

2
arch/arm/kernel/process.c
View File

@ -5,8 +5,6 @@
* Copyright (C) 1996-2000 Russell King - Converted to ARM.
* Original Copyright (C) 1995 Linus Torvalds
*/
#include <stdarg.h>
#include <linux/export.h>
#include <linux/sched.h>
#include <linux/sched/debug.h>

2
arch/arm/mach-bcm/bcm_kona_smc.c
View File

@ -10,8 +10,6 @@
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdarg.h>
#include <linux/smp.h>
#include <linux/io.h>
#include <linux/ioport.h>

3
arch/arm64/kernel/process.c
View File

@ -6,9 +6,6 @@
* Copyright (C) 1996-2000 Russell King - Converted to ARM.
* Copyright (C) 2012 ARM Ltd.
*/
#include <stdarg.h>
#include <linux/compat.h>
#include <linux/efi.h>
#include <linux/elf.h>

2
arch/ia64/Kbuild
View File

@ -1 +1,3 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-y += kernel/ mm/
obj-$(CONFIG_IA64_SGI_UV) += uv/

2
arch/ia64/Makefile
View File

@ -47,8 +47,6 @@ KBUILD_CFLAGS += $(cflags-y)
head-y := arch/ia64/kernel/head.o
libs-y += arch/ia64/lib/
core-y += arch/ia64/kernel/ arch/ia64/mm/
core-$(CONFIG_IA64_SGI_UV) += arch/ia64/uv/
drivers-y += arch/ia64/pci/ arch/ia64/hp/common/

2
arch/mips/Makefile
View File

@ -254,7 +254,7 @@ endif
#
# Board-dependent options and extra files
#
include arch/mips/Kbuild.platforms
include $(srctree)/arch/mips/Kbuild.platforms
ifdef CONFIG_PHYSICAL_START
load-y = $(CONFIG_PHYSICAL_START)

2
arch/openrisc/kernel/process.c
View File

@ -14,8 +14,6 @@
*/
#define __KERNEL_SYSCALLS__
#include <stdarg.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/sched/debug.h>

2
arch/parisc/kernel/firmware.c
View File

@ -51,7 +51,7 @@
* prumpf 991016
*/
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/delay.h>
#include <linux/init.h>

3
arch/parisc/kernel/process.c
View File

@ -17,9 +17,6 @@
* Copyright (C) 2001-2014 Helge Deller <deller@gmx.de>
* Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
*/
#include <stdarg.h>
#include <linux/elf.h>
#include <linux/errno.h>
#include <linux/kernel.h>

1
arch/powerpc/kernel/prom.c
View File

@ -11,7 +11,6 @@
#undef DEBUG
#include <stdarg.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/init.h>

2
arch/powerpc/kernel/prom_init.c
View File

@ -14,7 +14,7 @@
/* we cannot use FORTIFY as it brings in new symbols */
#define __NO_FORTIFY
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/init.h>

2
arch/powerpc/kernel/rtas.c
View File

@ -7,7 +7,7 @@
* Copyright (C) 2001 IBM.
*/
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/spinlock.h>

2
arch/powerpc/kernel/udbg.c
View File

@ -5,7 +5,7 @@
* c 2001 PPC 64 Team, IBM Corp
*/
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/console.h>

2
arch/riscv/Makefile
View File

@ -41,7 +41,7 @@ endif
ifeq ($(CONFIG_LD_IS_LLD),y)
KBUILD_CFLAGS += -mno-relax
KBUILD_AFLAGS += -mno-relax
ifneq ($(LLVM_IAS),1)
ifndef CONFIG_AS_IS_LLVM
KBUILD_CFLAGS += -Wa,-mno-relax
KBUILD_AFLAGS += -Wa,-mno-relax
endif

14
arch/s390/Makefile
View File

@ -70,7 +70,7 @@ cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
#
cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y)
ifneq ($(call cc-option,-mpacked-stack -mbackchain -msoft-float),)
cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
endif
@ -78,22 +78,22 @@ endif
KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),)
cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
ifneq ($(call cc-option-yn,-mstack-size=8192),y)
ifeq ($(call cc-option,-mstack-size=8192),)
cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
endif
endif
ifdef CONFIG_WARN_DYNAMIC_STACK
ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
ifneq ($(call cc-option,-mwarn-dynamicstack),)
KBUILD_CFLAGS += -mwarn-dynamicstack
KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
endif
endif
ifdef CONFIG_EXPOLINE
ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
ifneq ($(call cc-option,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),)
CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
CC_FLAGS_EXPOLINE += -mfunction-return=thunk
CC_FLAGS_EXPOLINE += -mindirect-branch-table
@ -104,10 +104,10 @@ ifdef CONFIG_EXPOLINE
endif
ifdef CONFIG_FUNCTION_TRACER
ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
ifeq ($(call cc-option,-mfentry -mnop-mcount),)
# make use of hotpatch feature if the compiler supports it
cc_hotpatch := -mhotpatch=0,3
ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
ifneq ($(call cc-option,$(cc_hotpatch)),)
CC_FLAGS_FTRACE := $(cc_hotpatch)
KBUILD_AFLAGS += -DCC_USING_HOTPATCH
KBUILD_CFLAGS += -DCC_USING_HOTPATCH

2
arch/s390/boot/pgm_check_info.c
View File

@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/stdarg.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <asm/stacktrace.h>
@ -8,7 +9,6 @@
#include <asm/setup.h>
#include <asm/sclp.h>
#include <asm/uv.h>
#include <stdarg.h>
#include "boot.h"
const char hex_asc[] = "0123456789abcdef";

56
arch/sh/boot/compressed/install.sh
View File

@ -1,56 +0,0 @@
#!/bin/sh
#
# arch/sh/boot/install.sh
#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1995 by Linus Torvalds
#
# Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin
# Adapted from code in arch/i386/boot/install.sh by Russell King
# Adapted from code in arch/arm/boot/install.sh by Stuart Menefy
#
# "make install" script for sh architecture
#
# Arguments:
# $1 - kernel version
# $2 - kernel image file
# $3 - kernel map file
# $4 - default install path (blank if root directory)
#
# User may have a custom install script
if [ -x /sbin/${INSTALLKERNEL} ]; then
exec /sbin/${INSTALLKERNEL} "$@"
fi
if [ "$2" = "zImage" ]; then
# Compressed install
echo "Installing compressed kernel"
if [ -f $4/vmlinuz-$1 ]; then
mv $4/vmlinuz-$1 $4/vmlinuz.old
fi
if [ -f $4/System.map-$1 ]; then
mv $4/System.map-$1 $4/System.old
fi
cat $2 > $4/vmlinuz-$1
cp $3 $4/System.map-$1
else
# Normal install
echo "Installing normal kernel"
if [ -f $4/vmlinux-$1 ]; then
mv $4/vmlinux-$1 $4/vmlinux.old
fi
if [ -f $4/System.map ]; then
mv $4/System.map $4/System.old
fi
cat $2 > $4/vmlinux-$1
cp $3 $4/System.map
fi

3
arch/sparc/Makefile
View File

@ -72,7 +72,8 @@ image zImage uImage tftpboot.img vmlinux.aout: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
install:
$(Q)$(MAKE) $(build)=$(boot) $@
sh $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \
System.map "$(INSTALL_PATH)"
archclean:
$(Q)$(MAKE) $(clean)=$(boot)

4
arch/sparc/boot/Makefile
View File

@ -70,7 +70,3 @@ $(obj)/image: vmlinux FORCE
$(obj)/tftpboot.img: $(obj)/image $(obj)/piggyback System.map $(ROOT_IMG) FORCE
$(call if_changed,elftoaout)
$(call if_changed,piggy)
install:
sh $(srctree)/$(src)/install.sh $(KERNELRELEASE) $(obj)/zImage \
System.map "$(INSTALL_PATH)"

3
arch/sparc/kernel/process_32.c
View File

@ -8,9 +8,6 @@
/*
* This file handles the architecture-dependent parts of process handling..
*/
#include <stdarg.h>
#include <linux/elfcore.h>
#include <linux/errno.h>
#include <linux/module.h>

3
arch/sparc/kernel/process_64.c
View File

@ -9,9 +9,6 @@
/*
* This file handles the architecture-dependent parts of process handling..
*/
#include <stdarg.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/sched.h>

6
arch/um/Makefile
View File

@ -41,8 +41,8 @@ endif
HOST_DIR := arch/$(HEADER_ARCH)
include $(ARCH_DIR)/Makefile-skas
include $(HOST_DIR)/Makefile.um
include $(srctree)/$(ARCH_DIR)/Makefile-skas
include $(srctree)/$(HOST_DIR)/Makefile.um
core-y += $(HOST_DIR)/um/
@ -76,7 +76,7 @@ USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
-idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
#This will adjust *FLAGS accordingly to the platform.
include $(ARCH_DIR)/Makefile-os-$(OS)
include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
-I$(srctree)/$(HOST_DIR)/include/uapi \

1
arch/um/drivers/rtc_user.c
View File

@ -3,6 +3,7 @@
* Copyright (C) 2020 Intel Corporation
* Author: Johannes Berg <johannes@sipsolutions.net>
*/
#include <stdbool.h>
#include <os.h>
#include <errno.h>
#include <sched.h>

1
arch/um/drivers/vector_user.c
View File

@ -3,6 +3,7 @@
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <stdbool.h>
#include <stdio.h>
#include <unistd.h>
#include <stdarg.h>

1
arch/um/include/shared/irq_user.h
View File

@ -7,7 +7,6 @@
#define __IRQ_USER_H__
#include <sysdep/ptrace.h>
#include <stdbool.h>
enum um_irq_type {
IRQ_READ,

1
arch/um/include/shared/os.h
View File

@ -8,7 +8,6 @@
#ifndef __OS_H__
#define __OS_H__
#include <stdarg.h>
#include <irq_user.h>
#include <longjmp.h>
#include <mm_id.h>

2
arch/um/os-Linux/signal.c
View File

@ -67,7 +67,7 @@ int signals_enabled;
#ifdef UML_CONFIG_UML_TIME_TRAVEL_SUPPORT
static int signals_blocked;
#else
#define signals_blocked false
#define signals_blocked 0
#endif
static unsigned int signals_pending;
static unsigned int signals_active = 0;

1
arch/um/os-Linux/util.c
View File

@ -3,6 +3,7 @@
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

2
arch/x86/Makefile
View File

@ -73,7 +73,7 @@ ifeq ($(CONFIG_X86_32),y)
KBUILD_CFLAGS += $(cc_stack_align4)
# CPU-specific tuning. Anything which can be shared with UML should go here.
include arch/x86/Makefile_32.cpu
include $(srctree)/arch/x86/Makefile_32.cpu
KBUILD_CFLAGS += $(cflags-y)
# temporary until string.h is fixed

6
arch/x86/Makefile_32.cpu
View File

@ -2,13 +2,7 @@
# CPU tuning section - shared with UML.
# Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML.
#-mtune exists since gcc 3.4
HAS_MTUNE := $(call cc-option-yn, -mtune=i386)
ifeq ($(HAS_MTUNE),y)
tune = $(call cc-option,-mtune=$(1),$(2))
else
tune = $(call cc-option,-mcpu=$(1),$(2))
endif
cflags-$(CONFIG_M486SX) += -march=i486
cflags-$(CONFIG_M486) += -march=i486

2
arch/x86/boot/boot.h
View File

@ -18,7 +18,7 @@
#ifndef __ASSEMBLY__
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/types.h>
#include <linux/edd.h>
#include <asm/setup.h>

2
arch/x86/entry/vdso/Makefile
View File

@ -131,7 +131,7 @@ $(obj)/%-x32.o: $(obj)/%.o FORCE
targets += vdsox32.lds $(vobjx32s-y)
$(obj)/%.so: OBJCOPYFLAGS := -S --remove-section __ex_table
$(obj)/%.so: $(obj)/%.so.dbg
$(obj)/%.so: $(obj)/%.so.dbg FORCE
$(call if_changed,objcopy)
$(obj)/vdsox32.so.dbg: $(obj)/vdsox32.lds $(vobjx32s) FORCE

1
drivers/block/xen-blkback/xenbus.c
View File

@ -8,7 +8,6 @@
#define pr_fmt(fmt) "xen-blkback: " fmt
#include <stdarg.h>
#include <linux/module.h>
#include <linux/kthread.h>
#include <xen/events.h>

2
drivers/firmware/efi/libstub/efi-stub-helper.c
View File

@ -7,7 +7,7 @@
* Copyright 2011 Intel Corporation; author Matt Fleming
*/
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/ctype.h>
#include <linux/efi.h>

2
drivers/firmware/efi/libstub/vsprintf.c
View File

@ -10,7 +10,7 @@
* Oh, it's a waste of space, but oh-so-yummy for debugging.
*/
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/compiler.h>
#include <linux/ctype.h>

2
drivers/gpu/drm/amd/display/dc/dc_helper.c
View File

@ -28,9 +28,9 @@
*/
#include <linux/delay.h>
#include <linux/stdarg.h>
#include "dm_services.h"
#include <stdarg.h>
#include "dc.h"
#include "dc_dmub_srv.h"

1
drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
View File

@ -39,7 +39,6 @@
#include <linux/types.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <stdarg.h>
#include "atomfirmware.h"

2
drivers/gpu/drm/drm_print.c
View File

@ -25,7 +25,7 @@
#define DEBUG /* for pr_debug() */
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/io.h>
#include <linux/moduleparam.h>

1
drivers/gpu/drm/msm/disp/msm_disp_snapshot.h
View File

@ -24,7 +24,6 @@
#include <linux/pm_runtime.h>
#include <linux/kthread.h>
#include <linux/devcoredump.h>
#include <stdarg.h>
#include "msm_kms.h"
#define MSM_DISP_SNAPSHOT_MAX_BLKS 10

2
drivers/isdn/capi/capiutil.c
View File

@ -379,7 +379,7 @@ static char *pnames[] =
/*2f */ "Useruserdata"
};
#include <stdarg.h>
#include <linux/stdarg.h>
/*-------------------------------------------------------*/
static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt, ...)

1
drivers/macintosh/macio-adb.c
View File

@ -2,7 +2,6 @@
/*
* Driver for the ADB controller in the Mac I/O (Hydra) chip.
*/
#include <stdarg.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>

2
drivers/macintosh/via-cuda.c
View File

@ -9,7 +9,7 @@
*
* Copyright (C) 1996 Paul Mackerras.
*/
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>

2
drivers/macintosh/via-macii.c
View File

@ -23,8 +23,6 @@
* Apple's "ADB Analyzer" bus sniffer is invaluable:
* ftp://ftp.apple.com/developer/Tool_Chest/Devices_-_Hardware/Apple_Desktop_Bus/
*/
#include <stdarg.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>

2
drivers/macintosh/via-pmu.c
View File

@ -18,7 +18,7 @@
* a sleep or a freq. switch
*
*/
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/mutex.h>
#include <linux/types.h>
#include <linux/errno.h>

1
drivers/net/wireless/intersil/orinoco/hermes.c
View File

@ -79,7 +79,6 @@
#undef HERMES_DEBUG
#ifdef HERMES_DEBUG
#include <stdarg.h>
#define DEBUG(lvl, stuff...) if ((lvl) <= HERMES_DEBUG) DMSG(stuff)

1
drivers/net/wwan/iosm/iosm_ipc_imem.h
View File

@ -7,7 +7,6 @@
#define IOSM_IPC_IMEM_H
#include <linux/skbuff.h>
#include <stdbool.h>
#include "iosm_ipc_mmio.h"
#include "iosm_ipc_pcie.h"

1
drivers/pinctrl/aspeed/pinmux-aspeed.h
View File

@ -5,7 +5,6 @@
#define ASPEED_PINMUX_H
#include <linux/regmap.h>
#include <stdbool.h>
/*
* The ASPEED SoCs provide typically more than 200 pins for GPIO and other

1
drivers/scsi/elx/efct/efct_driver.h
View File

@ -10,7 +10,6 @@
/***************************************************************************
* OS specific includes
*/
#include <stdarg.h>
#include <linux/module.h>
#include <linux/debugfs.h>
#include <linux/firmware.h>

2
drivers/staging/media/atomisp/pci/hive_isp_css_common/host/isp_local.h
View File

@ -16,8 +16,6 @@
#ifndef __ISP_LOCAL_H_INCLUDED__
#define __ISP_LOCAL_H_INCLUDED__
#include <stdbool.h>
#include "isp_global.h"
#include <isp2400_support.h>

2
drivers/staging/media/atomisp/pci/hive_isp_css_include/print_support.h
View File

@ -16,7 +16,7 @@
#ifndef __PRINT_SUPPORT_H_INCLUDED__
#define __PRINT_SUPPORT_H_INCLUDED__
#include <stdarg.h>
#include <linux/stdarg.h>
extern int (*sh_css_printf)(const char *fmt, va_list args);
/* depends on host supplied print function in ia_css_init() */

2
drivers/staging/media/atomisp/pci/ia_css_env.h
View File

@ -17,7 +17,7 @@
#define __IA_CSS_ENV_H
#include <type_support.h>
#include <stdarg.h> /* va_list */
#include <linux/stdarg.h> /* va_list */
#include "ia_css_types.h"
#include "ia_css_acc_types.h"

2
drivers/staging/media/atomisp/pci/runtime/debug/interface/ia_css_debug.h
View File

@ -19,7 +19,7 @@
/*! \file */
#include <type_support.h>
#include <stdarg.h>
#include <linux/stdarg.h>
#include "ia_css_types.h"
#include "ia_css_binary.h"
#include "ia_css_frame_public.h"

2
drivers/staging/media/atomisp/pci/sh_css_internal.h
View File

@ -20,7 +20,7 @@
#include <math_support.h>
#include <type_support.h>
#include <platform_support.h>
#include <stdarg.h>
#include <linux/stdarg.h>
#if !defined(ISP2401)
#include "input_formatter.h"

2
drivers/xen/xen-scsiback.c
View File

@ -33,8 +33,6 @@
#define pr_fmt(fmt) "xen-pvscsi: " fmt
#include <stdarg.h>
#include <linux/module.h>
#include <linux/utsname.h>
#include <linux/interrupt.h>

2
fs/befs/debug.c
View File

@ -14,7 +14,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#ifdef __KERNEL__
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>

2
fs/reiserfs/prints.c
View File

@ -8,7 +8,7 @@
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <stdarg.h>
#include <linux/stdarg.h>
static char error_buf[1024];
static char fmt_buf[1024];

2
fs/ufs/super.c
View File

@ -70,7 +70,7 @@
#include <linux/module.h>
#include <linux/bitops.h>
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/uaccess.h>

2
include/acpi/platform/acgcc.h
View File

@ -22,7 +22,7 @@ typedef __builtin_va_list va_list;
#define va_arg(v, l) __builtin_va_arg(v, l)
#define va_copy(d, s) __builtin_va_copy(d, s)
#else
#include <stdarg.h>
#include <linux/stdarg.h>
#endif
#endif

2
include/linux/filter.h
View File

@ -5,8 +5,6 @@
#ifndef __LINUX_FILTER_H__
#define __LINUX_FILTER_H__
#include <stdarg.h>
#include <linux/atomic.h>
#include <linux/refcount.h>
#include <linux/compat.h>

2
include/linux/kernel.h
View File

@ -2,7 +2,7 @@
#ifndef _LINUX_KERNEL_H
#define _LINUX_KERNEL_H
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/align.h>
#include <linux/limits.h>
#include <linux/linkage.h>

1
include/linux/mISDNif.h
View File

@ -18,7 +18,6 @@
#ifndef mISDNIF_H
#define mISDNIF_H
#include <stdarg.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/socket.h>

2
include/linux/printk.h
View File

@ -2,7 +2,7 @@
#ifndef __KERNEL_PRINTK__
#define __KERNEL_PRINTK__
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/init.h>
#include <linux/kern_levels.h>
#include <linux/linkage.h>

11
include/linux/stdarg.h Normal file
View File

@ -0,0 +1,11 @@
// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef _LINUX_STDARG_H
#define _LINUX_STDARG_H
typedef __builtin_va_list va_list;
#define va_start(v, l) __builtin_va_start(v, l)
#define va_end(v) __builtin_va_end(v)
#define va_arg(v, T) __builtin_va_arg(v, T)
#define va_copy(d, s) __builtin_va_copy(d, s)
#endif

2
include/linux/string.h
View File

@ -6,7 +6,7 @@
#include <linux/types.h> /* for size_t */
#include <linux/stddef.h> /* for NULL */
#include <linux/errno.h> /* for E2BIG */
#include <stdarg.h>
#include <linux/stdarg.h>
#include <uapi/linux/string.h>
extern char *strndup_user(const char __user *, long);

1
kernel/debug/kdb/kdb_support.c
View File

@ -10,7 +10,6 @@
* 03/02/13 added new 2.5 kallsyms <xavier.bru@bull.net>
*/
#include <stdarg.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/mm.h>

2
lib/Kconfig.debug
View File

@ -365,6 +365,7 @@ config STRIP_ASM_SYMS
config READABLE_ASM
bool "Generate readable assembler code"
depends on DEBUG_KERNEL
depends on CC_IS_GCC
help
Disable some compiler optimizations that tend to generate human unreadable
assembler output. This may make the kernel slightly slower, but it helps
@ -383,6 +384,7 @@ config HEADERS_INSTALL
config DEBUG_SECTION_MISMATCH
bool "Enable full Section mismatch analysis"
depends on CC_IS_GCC
help
The section mismatch analysis checks if there are illegal
references from one section to another section.

3
lib/debug_info.c
View File

@ -5,8 +5,6 @@
* CONFIG_DEBUG_INFO_REDUCED. Please do not add actual code. However,
* adding appropriate #includes is fine.
*/
#include <stdarg.h>
#include <linux/cred.h>
#include <linux/crypto.h>
#include <linux/dcache.h>
@ -22,6 +20,7 @@
#include <linux/net.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/stdarg.h>
#include <linux/types.h>
#include <net/addrconf.h>
#include <net/sock.h>

2
lib/kasprintf.c
View File

@ -5,7 +5,7 @@
* Copyright (C) 1991, 1992 Linus Torvalds
*/
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/types.h>

2
lib/kunit/string-stream.h
View File

@ -11,7 +11,7 @@
#include <linux/spinlock.h>
#include <linux/types.h>
#include <stdarg.h>
#include <linux/stdarg.h>
struct string_stream_fragment {
struct kunit *test;

2
lib/vsprintf.c
View File

@ -17,7 +17,7 @@
* - scnprintf and vscnprintf
*/
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/build_bug.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>

2
mm/kfence/report.c
View File

@ -5,7 +5,7 @@
* Copyright (C) 2020, Google LLC.
*/
#include <stdarg.h>
#include <linux/stdarg.h>
#include <linux/kernel.h>
#include <linux/lockdep.h>

2
net/batman-adv/log.c
View File

@ -7,7 +7,7 @@
#include "log.h"
#include "main.h"
#include <stdarg.h>
#include <linux/stdarg.h>
#include "trace.h"

13
scripts/Kbuild.include
View File

@ -57,6 +57,7 @@ kecho := $($(quiet)kecho)
# - If the content differ the new file is used
# - If they are equal no change, and no timestamp update
define filechk
$(check-FORCE)
$(Q)set -e; \
mkdir -p $(dir $@); \
trap "rm -f $(dot-target).tmp" EXIT; \
@ -130,13 +131,19 @@ make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1))))
# PHONY targets skipped in both cases.
newer-prereqs = $(filter-out $(PHONY),$?)
# It is a typical mistake to forget the FORCE prerequisite. Check it here so
# no more breakage will slip in.
check-FORCE = $(if $(filter FORCE, $^),,$(warning FORCE prerequisite is missing))
if-changed-cond = $(newer-prereqs)$(cmd-check)$(check-FORCE)
# Execute command if command has changed or prerequisite(s) are updated.
if_changed = $(if $(newer-prereqs)$(cmd-check), \
if_changed = $(if $(if-changed-cond), \
$(cmd); \
printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
# Execute the command and also postprocess generated .d dependencies file.
if_changed_dep = $(if $(newer-prereqs)$(cmd-check),$(cmd_and_fixdep),@:)
if_changed_dep = $(if $(if-changed-cond),$(cmd_and_fixdep),@:)
cmd_and_fixdep = \
$(cmd); \
@ -146,7 +153,7 @@ cmd_and_fixdep = \
# Usage: $(call if_changed_rule,foo)
# Will check if $(cmd_foo) or any of the prerequisites changed,
# and if so will execute $(rule_foo).
if_changed_rule = $(if $(newer-prereqs)$(cmd-check),$(rule_$(1)),@:)
if_changed_rule = $(if $(if-changed-cond),$(rule_$(1)),@:)
###
# why - tell why a target got built

30
scripts/Makefile.build
View File

@ -88,6 +88,10 @@ endif
targets-for-modules := $(patsubst %.o, %.mod, $(filter %.o, $(obj-m)))
ifdef CONFIG_LTO_CLANG
targets-for-modules += $(patsubst %.o, %.lto.o, $(filter %.o, $(obj-m)))
endif
ifdef need-modorder
targets-for-modules += $(obj)/modules.order
endif
@ -173,6 +177,8 @@ cmd_modversions_c = \
if $(NM) $@ 2>/dev/null | grep -q __ksymtab; then \
$(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
> $@.symversions; \
else \
rm -f $@.symversions; \
fi;
else
cmd_modversions_c = \
@ -271,12 +277,33 @@ $(obj)/%.o: $(src)/%.c $(recordmcount_source) $$(objtool_dep) FORCE
$(call if_changed_rule,cc_o_c)
$(call cmd,force_checksrc)
ifdef CONFIG_LTO_CLANG
# Module .o files may contain LLVM bitcode, compile them into native code
# before ELF processing
quiet_cmd_cc_lto_link_modules = LTO [M] $@
cmd_cc_lto_link_modules = \
$(LD) $(ld_flags) -r -o $@ \
$(shell [ -s $(@:.lto.o=.o.symversions) ] && \
echo -T $(@:.lto.o=.o.symversions)) \
--whole-archive $(filter-out FORCE,$^)
ifdef CONFIG_STACK_VALIDATION
# objtool was skipped for LLVM bitcode, run it now that we have compiled
# modules into native code
cmd_cc_lto_link_modules += ; \
$(objtree)/tools/objtool/objtool $(objtool_args) --module $@
endif
$(obj)/%.lto.o: $(obj)/%.o FORCE
$(call if_changed,cc_lto_link_modules)
endif
cmd_mod = { \
echo $(if $($*-objs)$($*-y)$($*-m), $(addprefix $(obj)/, $($*-objs) $($*-y) $($*-m)), $(@:.mod=.o)); \
$(undefined_syms) echo; \
} > $@
$(obj)/%.mod: $(obj)/%.o FORCE
$(obj)/%.mod: $(obj)/%$(mod-prelink-ext).o FORCE
$(call if_changed,mod)
quiet_cmd_cc_lst_c = MKLST $@
@ -381,7 +408,6 @@ $(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ;
$(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ;
# combine symversions for later processing
quiet_cmd_update_lto_symversions = SYMVER $@
ifeq ($(CONFIG_LTO_CLANG) $(CONFIG_MODVERSIONS),y y)
cmd_update_lto_symversions = \
rm -f $@.symversions \

35
scripts/Makefile.clang Normal file
View File

@ -0,0 +1,35 @@
# Individual arch/{arch}/Makefiles should use -EL/-EB to set intended
# endianness and -m32/-m64 to set word size based on Kconfigs instead of
# relying on the target triple.
CLANG_TARGET_FLAGS_arm := arm-linux-gnueabi
CLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu
CLANG_TARGET_FLAGS_hexagon := hexagon-linux-musl
CLANG_TARGET_FLAGS_m68k := m68k-linux-gnu
CLANG_TARGET_FLAGS_mips := mipsel-linux-gnu
CLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu
CLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu
CLANG_TARGET_FLAGS_s390 := s390x-linux-gnu
CLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu
CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(SRCARCH))
ifeq ($(CROSS_COMPILE),)
ifeq ($(CLANG_TARGET_FLAGS),)
$(error Specify CROSS_COMPILE or add '--target=' option to scripts/Makefile.clang)
else
CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS)
endif # CLANG_TARGET_FLAGS
else
CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
endif # CROSS_COMPILE
ifeq ($(LLVM_IAS),0)
CLANG_FLAGS += -fno-integrated-as
GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
else
CLANG_FLAGS += -fintegrated-as
endif
CLANG_FLAGS += -Werror=unknown-warning-option
KBUILD_CFLAGS += $(CLANG_FLAGS)
KBUILD_AFLAGS += $(CLANG_FLAGS)
export CLANG_FLAGS

18
scripts/Makefile.lib
View File

@ -225,17 +225,23 @@ dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc \
$(addprefix -I,$(DTC_INCLUDE)) \
-undef -D__DTS__
ifeq ($(CONFIG_LTO_CLANG),y)
# With CONFIG_LTO_CLANG, .o files in modules might be LLVM bitcode, so we
# need to run LTO to compile them into native code (.lto.o) before further
# processing.
mod-prelink-ext := .lto
endif
# Objtool arguments are also needed for modfinal with LTO, so we define
# then here to avoid duplication.
objtool_args = \
$(if $(CONFIG_UNWINDER_ORC),orc generate,check) \
$(if $(part-of-module), --module,) \
$(if $(part-of-module), --module) \
$(if $(CONFIG_FRAME_POINTER),, --no-fp) \
$(if $(or $(CONFIG_GCOV_KERNEL),$(CONFIG_LTO_CLANG)), \
--no-unreachable,) \
$(if $(CONFIG_RETPOLINE), --retpoline,) \
$(if $(CONFIG_X86_SMAP), --uaccess,) \
$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount,)
$(if $(CONFIG_GCOV_KERNEL)$(CONFIG_LTO_CLANG), --no-unreachable)\
$(if $(CONFIG_RETPOLINE), --retpoline) \
$(if $(CONFIG_X86_SMAP), --uaccess) \
$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount)
# Useful for describing the dependency of composite objects
# Usage:

21
scripts/Makefile.modfinal
View File

@ -9,7 +9,7 @@ __modfinal:
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
# for c_flags and objtool_args
# for c_flags and mod-prelink-ext
include $(srctree)/scripts/Makefile.lib
# find all modules listed in modules.order
@ -30,23 +30,6 @@ quiet_cmd_cc_o_c = CC [M] $@
ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
ifdef CONFIG_LTO_CLANG
# With CONFIG_LTO_CLANG, reuse the object file we compiled for modpost to
# avoid a second slow LTO link
prelink-ext := .lto
# ELF processing was skipped earlier because we didn't have native code,
# so let's now process the prelinked binary before we link the module.
ifdef CONFIG_STACK_VALIDATION
cmd_ld_ko_o += \
$(objtree)/tools/objtool/objtool $(objtool_args) \
$(@:.ko=$(prelink-ext).o);
endif # CONFIG_STACK_VALIDATION
endif # CONFIG_LTO_CLANG
quiet_cmd_ld_ko_o = LD [M] $@
cmd_ld_ko_o += \
$(LD) -r $(KBUILD_LDFLAGS) \
@ -72,7 +55,7 @@ if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \
# Re-generate module BTFs if either module's .ko or vmlinux changed
$(modules): %.ko: %$(prelink-ext).o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE
$(modules): %.ko: %$(mod-prelink-ext).o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE
+$(call if_changed_except,ld_ko_o,vmlinux)
ifdef CONFIG_DEBUG_INFO_BTF_MODULES
+$(if $(newer-prereqs),$(call cmd,btf_ko))

22
scripts/Makefile.modpost
View File

@ -41,7 +41,7 @@ __modpost:
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
# for ld_flags
# for mod-prelink-ext
include $(srctree)/scripts/Makefile.lib
MODPOST = scripts/mod/modpost \
@ -118,22 +118,6 @@ $(input-symdump):
@echo >&2 ' Modules may not have dependencies or modversions.'
@echo >&2 ' You may get many unresolved symbol warnings.'
ifdef CONFIG_LTO_CLANG
# With CONFIG_LTO_CLANG, .o files might be LLVM bitcode, so we need to run
# LTO to compile them into native code before running modpost
prelink-ext := .lto
quiet_cmd_cc_lto_link_modules = LTO [M] $@
cmd_cc_lto_link_modules = \
$(LD) $(ld_flags) -r -o $@ \
$(shell [ -s $(@:.lto.o=.o.symversions) ] && \
echo -T $(@:.lto.o=.o.symversions)) \
--whole-archive $^
%.lto.o: %.o
$(call if_changed,cc_lto_link_modules)
endif
modules := $(sort $(shell cat $(MODORDER)))
# KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined symbols
@ -144,9 +128,9 @@ endif
# Read out modules.order to pass in modpost.
# Otherwise, allmodconfig would fail with "Argument list too long".
quiet_cmd_modpost = MODPOST $@
cmd_modpost = sed 's/\.ko$$/$(prelink-ext)\.o/' $< | $(MODPOST) -T -
cmd_modpost = sed 's/\.ko$$/$(mod-prelink-ext)\.o/' $< | $(MODPOST) -T -
$(output-symdump): $(MODORDER) $(input-symdump) $(modules:.ko=$(prelink-ext).o) FORCE
$(output-symdump): $(MODORDER) $(input-symdump) $(modules:.ko=$(mod-prelink-ext).o) FORCE
$(call if_changed,modpost)
targets += $(output-symdump)

4
scripts/adjust_autoksyms.sh
View File

@ -42,10 +42,10 @@ $CONFIG_SHELL $srctree/scripts/gen_autoksyms.sh "$new_ksyms_file"
changed=$(
count=0
sort "$cur_ksyms_file" "$new_ksyms_file" | uniq -u |
sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" |
sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' |
while read sympath; do
if [ -z "$sympath" ]; then continue; fi
depfile="include/ksym/${sympath}.h"
depfile="include/ksym/${sympath}"
mkdir -p "$(dirname "$depfile")"
touch "$depfile"
# Filesystems with coarse time precision may create timestamps

8
scripts/as-version.sh
View File

@ -21,14 +21,14 @@ get_canonical_version()
echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0}))
}
# Clang fails to handle -Wa,--version unless -no-integrated-as is given.
# We check -(f)integrated-as, expecting it is explicitly passed in for the
# Clang fails to handle -Wa,--version unless -fno-integrated-as is given.
# We check -fintegrated-as, expecting it is explicitly passed in for the
# integrated assembler case.
check_integrated_as()
{
while [ $# -gt 0 ]; do
if [ "$1" = -integrated-as -o "$1" = -fintegrated-as ]; then
# For the intergrated assembler, we do not check the
if [ "$1" = -fintegrated-as ]; then
# For the integrated assembler, we do not check the
# version here. It is the same as the clang version, and
# it has been already checked by scripts/cc-version.sh.
echo LLVM 0

0
scripts/checkdeclares.pl Normal file → Executable file
View File

2
scripts/checkkconfigsymbols.py
View File

@ -329,7 +329,7 @@ def check_symbols_helper(pool, ignore):
if REGEX_FILE_KCONFIG.match(gitfile):
kconfig_files.append(gitfile)
else:
if ignore and not re.match(ignore, gitfile):
if ignore and re.match(ignore, gitfile):
continue
# add source files that do not match the ignore pattern
source_files.append(gitfile)

2
scripts/clang-tools/gen_compile_commands.py
View File

@ -18,7 +18,7 @@ _DEFAULT_OUTPUT = 'compile_commands.json'
_DEFAULT_LOG_LEVEL = 'WARNING'
_FILENAME_PATTERN = r'^\..*\.cmd$'
_LINE_PATTERN = r'^cmd_[^ ]*\.o := (.* )([^ ]*\.c)$'
_LINE_PATTERN = r'^cmd_[^ ]*\.o := (.* )([^ ]*\.c) *(;|$)'
_VALID_LOG_LEVELS = ['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL']
# The tools/ directory adopts a different build system, and produces .cmd
# files in a different format. Do not support it.

0
scripts/gcc-plugins/gen-random-seed.sh Normal file → Executable file
View File

12
scripts/gen_autoksyms.sh
View File

@ -26,18 +26,6 @@ if [ -n "$CONFIG_MODVERSIONS" ]; then
needed_symbols="$needed_symbols module_layout"
fi
# With CONFIG_LTO_CLANG, LLVM bitcode has not yet been compiled into a binary
# when the .mod files are generated, which means they don't yet contain
# references to certain symbols that will be present in the final binaries.
if [ -n "$CONFIG_LTO_CLANG" ]; then
# intrinsic functions
needed_symbols="$needed_symbols memcpy memmove memset"
# ftrace
needed_symbols="$needed_symbols _mcount"
# stack protector symbols
needed_symbols="$needed_symbols __stack_chk_fail __stack_chk_guard"
fi
ksym_wl=
if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then
# Use 'eval' to expand the whitelist path and check if it is relative

11
scripts/gen_ksymdeps.sh
View File

@ -4,7 +4,13 @@
set -e
# List of exported symbols
ksyms=$($NM $1 | sed -n 's/.*__ksym_marker_\(.*\)/\1/p' | tr A-Z a-z)
#
# If the object has no symbol, $NM warns 'no symbols'.
# Suppress the stderr.
# TODO:
# Use -q instead of 2>/dev/null when we upgrade the minimum version of
# binutils to 2.37, llvm to 13.0.0.
ksyms=$($NM $1 2>/dev/null | sed -n 's/.*__ksym_marker_\(.*\)/\1/p')
if [ -z "$ksyms" ]; then
exit 0
@ -15,8 +21,7 @@ echo "ksymdeps_$1 := \\"
for s in $ksyms
do
echo $s | sed -e 's:^_*: $(wildcard include/ksym/:' \
-e 's:__*:/:g' -e 's/$/.h) \\/'
printf ' $(wildcard include/ksym/%s) \\\n' "$s"
done
echo

15
scripts/kconfig/merge_config.sh
View File

@ -28,6 +28,7 @@ usage() {
echo " -r list redundant entries when merging fragments"
echo " -y make builtin have precedence over modules"
echo " -O dir to put generated output files. Consider setting \$KCONFIG_CONFIG instead."
echo " -s strict mode. Fail if the fragment redefines any value."
echo
echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable."
}
@ -37,6 +38,7 @@ ALLTARGET=alldefconfig
WARNREDUN=false
BUILTIN=false
OUTPUT=.
STRICT=false
CONFIG_PREFIX=${CONFIG_-CONFIG_}
while true; do
@ -75,6 +77,11 @@ while true; do
shift 2
continue
;;
"-s")
STRICT=true
shift
continue
;;
*)
break
;;
@ -141,6 +148,9 @@ for ORIG_MERGE_FILE in $MERGE_LIST ; do
echo Previous value: $PREV_VAL
echo New value: $NEW_VAL
echo
if [ "$STRICT" = "true" ]; then
STRICT_MODE_VIOLATED=true
fi
elif [ "$WARNREDUN" = "true" ]; then
echo Value of $CFG is redundant by fragment $ORIG_MERGE_FILE:
fi
@ -153,6 +163,11 @@ for ORIG_MERGE_FILE in $MERGE_LIST ; do
cat $MERGE_FILE >> $TMP_FILE
done
if [ "$STRICT_MODE_VIOLATED" = "true" ]; then
echo "The fragment redefined a value and strict mode had been passed."
exit 1
fi
if [ "$RUNMAKE" = "false" ]; then
cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
echo "#"

81
scripts/link-vmlinux.sh
View File

@ -149,67 +149,54 @@ objtool_link()
# ${2}, ${3}, ... - optional extra .o files
vmlinux_link()
{
local lds="${objtree}/${KBUILD_LDS}"
local output=${1}
local objects
local strip_debug
local map_option
local objs
local libs
local ld
local ldflags
local ldlibs
info LD ${output}
# skip output file argument
shift
if [ -n "${CONFIG_LTO_CLANG}" ]; then
# Use vmlinux.o instead of performing the slow LTO link again.
objs=vmlinux.o
libs=
else
objs="${KBUILD_VMLINUX_OBJS}"
libs="${KBUILD_VMLINUX_LIBS}"
fi
if [ "${SRCARCH}" = "um" ]; then
wl=-Wl,
ld="${CC}"
ldflags="${CFLAGS_vmlinux}"
ldlibs="-lutil -lrt -lpthread"
else
wl=
ld="${LD}"
ldflags="${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux}"
ldlibs=
fi
ldflags="${ldflags} ${wl}--script=${objtree}/${KBUILD_LDS}"
# The kallsyms linking does not need debug symbols included.
if [ "$output" != "${output#.tmp_vmlinux.kallsyms}" ] ; then
strip_debug=-Wl,--strip-debug
ldflags="${ldflags} ${wl}--strip-debug"
fi
if [ -n "${CONFIG_VMLINUX_MAP}" ]; then
map_option="-Map=${output}.map"
ldflags="${ldflags} ${wl}-Map=${output}.map"
fi
if [ "${SRCARCH}" != "um" ]; then
if [ -n "${CONFIG_LTO_CLANG}" ]; then
# Use vmlinux.o instead of performing the slow LTO
# link again.
objects="--whole-archive \
vmlinux.o \
--no-whole-archive \
${@}"
else
objects="--whole-archive \
${KBUILD_VMLINUX_OBJS} \
--no-whole-archive \
--start-group \
${KBUILD_VMLINUX_LIBS} \
--end-group \
${@}"
fi
${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux} \
${strip_debug#-Wl,} \
-o ${output} \
${map_option} \
-T ${lds} ${objects}
else
objects="-Wl,--whole-archive \
${KBUILD_VMLINUX_OBJS} \
-Wl,--no-whole-archive \
-Wl,--start-group \
${KBUILD_VMLINUX_LIBS} \
-Wl,--end-group \
${@}"
${CC} ${CFLAGS_vmlinux} \
${strip_debug} \
-o ${output} \
${map_option:+-Wl,${map_option}} \
-Wl,-T,${lds} \
${objects} \
-lutil -lrt -lpthread
rm -f linux
fi
${ld} ${ldflags} -o ${output} \
${wl}--whole-archive ${objs} ${wl}--no-whole-archive \
${wl}--start-group ${libs} ${wl}--end-group \
$@ ${ldlibs}
}
# generate .BTF typeinfo from DWARF debuginfo

11
scripts/mod/modpost.c
View File

@ -17,6 +17,7 @@
#include <ctype.h>
#include <string.h>
#include <limits.h>
#include <stdbool.h>
#include <errno.h>
#include "modpost.h"
#include "../../include/linux/license.h"
@ -89,6 +90,14 @@ modpost_log(enum loglevel loglevel, const char *fmt, ...)
error_occurred = true;
}
static inline bool strends(const char *str, const char *postfix)
{
if (strlen(str) < strlen(postfix))
return false;
return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
}
void *do_nofail(void *ptr, const char *expr)
{
if (!ptr)
@ -2060,7 +2069,7 @@ static void read_symbols(const char *modname)
if (!mod->is_vmlinux) {
version = get_modinfo(&info, "version");
if (version || all_versions)
get_src_version(modname, mod->srcversion,
get_src_version(mod->name, mod->srcversion,
sizeof(mod->srcversion) - 1);
}

9
scripts/mod/modpost.h
View File

@ -2,7 +2,6 @@
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
@ -178,14 +177,6 @@ static inline unsigned int get_secindex(const struct elf_info *info,
return info->symtab_shndx_start[sym - info->symtab_start];
}
static inline bool strends(const char *str, const char *postfix)
{
if (strlen(str) < strlen(postfix))
return false;
return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
}
/* file2alias.c */
extern unsigned int cross_build;
void handle_moddevtable(struct module *mod, struct elf_info *info,

7
scripts/mod/sumversion.c
View File

@ -391,14 +391,9 @@ void get_src_version(const char *modname, char sum[], unsigned sumlen)
struct md4_ctx md;
char *fname;
char filelist[PATH_MAX + 1];
int postfix_len = 1;
if (strends(modname, ".lto.o"))
postfix_len = 5;
/* objects for a module are listed in the first line of *.mod file. */
snprintf(filelist, sizeof(filelist), "%.*smod",
(int)strlen(modname) - postfix_len, modname);
snprintf(filelist, sizeof(filelist), "%s.mod", modname);
buf = read_text_file(filelist);

0
scripts/syscallnr.sh Normal file → Executable file
View File

0
scripts/xen-hypercalls.sh Normal file → Executable file
View File

11
security/Makefile
View File

@ -4,16 +4,6 @@
#
obj-$(CONFIG_KEYS) += keys/
subdir-$(CONFIG_SECURITY_SELINUX) += selinux
subdir-$(CONFIG_SECURITY_SMACK) += smack
subdir-$(CONFIG_SECURITY_TOMOYO) += tomoyo
subdir-$(CONFIG_SECURITY_APPARMOR) += apparmor
subdir-$(CONFIG_SECURITY_YAMA) += yama
subdir-$(CONFIG_SECURITY_LOADPIN) += loadpin
subdir-$(CONFIG_SECURITY_SAFESETID) += safesetid
subdir-$(CONFIG_SECURITY_LOCKDOWN_LSM) += lockdown
subdir-$(CONFIG_BPF_LSM) += bpf
subdir-$(CONFIG_SECURITY_LANDLOCK) += landlock
# always enable default capabilities
obj-y += commoncap.o
@ -36,5 +26,4 @@ obj-$(CONFIG_BPF_LSM) += bpf/
obj-$(CONFIG_SECURITY_LANDLOCK) += landlock/
# Object integrity file lists
subdir-$(CONFIG_INTEGRITY) += integrity
obj-$(CONFIG_INTEGRITY) += integrity/

1
sound/aoa/codecs/onyx.h
View File

@ -6,7 +6,6 @@
*/
#ifndef __SND_AOA_CODEC_ONYX_H
#define __SND_AOA_CODEC_ONYX_H
#include <stddef.h>
#include <linux/i2c.h>
#include <asm/pmac_low_i2c.h>
#include <asm/prom.h>

1
sound/aoa/codecs/tas.c
View File

@ -58,7 +58,6 @@
* and up to the hardware designer to not wire
* them up in some weird unusable way.
*/
#include <stddef.h>
#include <linux/i2c.h>
#include <asm/pmac_low_i2c.h>
#include <asm/prom.h>

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