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Revert "kbuild/Makefile: Prepare for using macros in inline assembly code to work around asm() related GCC inlining bugs"

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This reverts commit 77b0bf55bc.

See this commit for details about the revert:

  e769742d35 ("Revert "x86/jump-labels: Macrofy inline assembly code to work around GCC inlining bugs"")

 Conflicts:
	arch/x86/Makefile

Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Borislav Petkov <bp@alien8.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Juergen Gross <jgross@suse.com>
Cc: Richard Biener <rguenther@suse.de>
Cc: Kees Cook <keescook@chromium.org>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Nadav Amit <namit@vmware.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2018-12-19 11:27:05 +01:00
parent 96af6cd02a
commit 6ac389346e
5 changed files with 3 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
Makefile
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@@ -1081,7 +1081,7 @@ scripts: scripts_basic scripts_dtc asm-generic gcc-plugins $(autoksyms_h)
# version.h and scripts_basic is processed / created. # version.h and scripts_basic is processed / created.
# Listed in dependency order # Listed in dependency order
PHONY += prepare archprepare macroprepare prepare0 prepare1 prepare2 prepare3 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
# prepare3 is used to check if we are building in a separate output directory, # prepare3 is used to check if we are building in a separate output directory,
# and if so do: # and if so do:
@@ -1104,9 +1104,7 @@ prepare2: prepare3 outputmakefile asm-generic
prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h
$(cmd_crmodverdir) $(cmd_crmodverdir)
macroprepare: prepare1 archmacros archprepare: archheaders archscripts prepare1 scripts_basic
archprepare: archheaders archscripts macroprepare scripts_basic
prepare0: archprepare gcc-plugins prepare0: archprepare gcc-plugins
$(Q)$(MAKE) $(build)=. $(Q)$(MAKE) $(build)=.
@@ -1174,9 +1172,6 @@ archheaders:
PHONY += archscripts PHONY += archscripts
archscripts: archscripts:
PHONY += archmacros
archmacros:
PHONY += __headers PHONY += __headers
__headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
$(Q)$(MAKE) $(build)=scripts build_unifdef $(Q)$(MAKE) $(build)=scripts build_unifdef

7
arch/x86/Makefile
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@@ -232,13 +232,6 @@ archscripts: scripts_basic
archheaders: archheaders:
$(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all $(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all
archmacros:
$(Q)$(MAKE) $(build)=arch/x86/kernel arch/x86/kernel/macros.s
ASM_MACRO_FLAGS = -Wa,arch/x86/kernel/macros.s
export ASM_MACRO_FLAGS
KBUILD_CFLAGS += $(ASM_MACRO_FLAGS)
### ###
# Kernel objects # Kernel objects

7
arch/x86/kernel/macros.S
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@@ -1,7 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* This file includes headers whose assembly part includes macros which are
* commonly used. The macros are precompiled into assmebly file which is later
* assembled together with each compiled file.
*/

4
scripts/Kbuild.include
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@@ -115,9 +115,7 @@ __cc-option = $(call try-run,\
# Do not attempt to build with gcc plugins during cc-option tests. # Do not attempt to build with gcc plugins during cc-option tests.
# (And this uses delayed resolution so the flags will be up to date.) # (And this uses delayed resolution so the flags will be up to date.)
# In addition, do not include the asm macros which are built later. CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS))
CC_OPTION_FILTERED = $(GCC_PLUGINS_CFLAGS) $(ASM_MACRO_FLAGS)
CC_OPTION_CFLAGS = $(filter-out $(CC_OPTION_FILTERED),$(KBUILD_CFLAGS))
# cc-option # cc-option
# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)

2
scripts/mod/Makefile
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@@ -4,8 +4,6 @@ OBJECT_FILES_NON_STANDARD := y
hostprogs-y := modpost mk_elfconfig hostprogs-y := modpost mk_elfconfig
always := $(hostprogs-y) empty.o always := $(hostprogs-y) empty.o
CFLAGS_REMOVE_empty.o := $(ASM_MACRO_FLAGS)
modpost-objs := modpost.o file2alias.o sumversion.o modpost-objs := modpost.o file2alias.o sumversion.o
devicetable-offsets-file := devicetable-offsets.h devicetable-offsets-file := devicetable-offsets.h