From 315bab4e972d9795529b764718d475492db40c0f Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Fri, 8 Jun 2018 09:21:43 +0900
Subject: kbuild: fix endless syncconfig in case arch Makefile sets
 CROSS_COMPILE

Commit 21c54b774744 ("kconfig: show compiler version text in the top
comment") was intended to detect the compiler upgrade, but Geert
reported a breakage on the m68k build.

The compiler upgrade is detected by the change of the environment
variable, CC_VERSION_TEXT, which contains the first line of the output
from $(CC) --version.  Currently, this works well when CROSS_COMPILE
is given via the environment variable or the Make command line.

However, some architectures such as m68k can specify CROSS_COMPILE
from arch/$(SRCARCH)/Makefile as well.  In this case, "make ARCH=m68k"
ends up with endless syncconfig loop.

  $ make ARCH=m68k defconfig
  *** Default configuration is based on 'multi_defconfig'
  #
  # configuration written to .config
  #
  $ make ARCH=m68k
  scripts/kconfig/conf  --syncconfig Kconfig
  scripts/kconfig/conf  --syncconfig Kconfig
  scripts/kconfig/conf  --syncconfig Kconfig
  scripts/kconfig/conf  --syncconfig Kconfig

Things are happening like this:

Because arch/$(SRCARCH)/Makefile is included after CC_VERSION_TEXT
is set, it contains the host compiler version in the defconfig phase.

To create or update auto.conf, the following line is triggered:

include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
        $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig

This recurses the top Makefile after arch/$(SRCARCH)/Makefile is
included.  CROSS_COMPILE is set to a m68k toolchain prefix and
exported to the recursed Make.  Then, syncconfig is invoked with
the target compiler version in CC_VERSION_TEXT.

The Make will restart because auto.conf and auto.conf.cmd have been
updated.  At this point, CROSS_COMPILE is reset, so CC_VERSION_TEXT
is set to the host compiler version again.  Then, syncconfig is
triggered due to the change of CC_VERSION_TEXT.  This loop continues
eternally.

To fix this problem, $(CC_VERSION_TEXT) must be evaluated only after
arch/$(SRCARCH)/Makefile.  Setting it earlier is OK as long as it is
defined by using the '=' operator instead of ':='.

For the defconfig phase, $(CC_VERSION_TEXT) is evaluated when Kbuild
descends into scripts/kconfig/, so it contains the target compiler
version correctly.

include/config/auto.conf.cmd references $(CC_VERSION_TEXT) as well,
so it must be included after arch/$(SRCARCH)/Makefile.

Fixes: 21c54b774744 ("kconfig: show compiler version text in the top comment")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
 Makefile | 54 ++++++++++++++++++++++++++++++------------------------
 1 file changed, 30 insertions(+), 24 deletions(-)

diff --git a/Makefile b/Makefile
index 019a5a020606..747edaf11559 100644
--- a/Makefile
+++ b/Makefile
@@ -442,8 +442,6 @@ export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
 export KBUILD_ARFLAGS
 
-export CC_VERSION_TEXT := $(shell $(CC) --version | head -n 1)
-
 # When compiling out-of-tree modules, put MODVERDIR in the module
 # tree rather than in the kernel tree. The kernel tree might
 # even be read-only.
@@ -514,6 +512,12 @@ ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/cc-can-link.sh $(CC)), y)
   export CC_CAN_LINK
 endif
 
+# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
+# Some architectures define CROSS_COMPILE in arch/$(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 = $(shell $(CC) --version | head -n 1)
+
 ifeq ($(config-targets),1)
 # ===========================================================================
 # *config targets only - make sure prerequisites are updated, and descend
@@ -523,7 +527,7 @@ ifeq ($(config-targets),1)
 # KBUILD_DEFCONFIG may point out an alternative default configuration
 # used for 'make defconfig'
 include arch/$(SRCARCH)/Makefile
-export KBUILD_DEFCONFIG KBUILD_KCONFIG
+export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
 
 config: scripts_basic outputmakefile FORCE
 	$(Q)$(MAKE) $(build)=scripts/kconfig $@
@@ -585,12 +589,32 @@ virt-y		:= virt/
 endif # KBUILD_EXTMOD
 
 ifeq ($(dot-config),1)
-# Read in config
 -include include/config/auto.conf
+endif
+
+# The all: target is the default when no target is given on the
+# command line.
+# This allow a user to issue only 'make' to build a kernel including modules
+# 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) \
+	$(call cc-disable-warning,maybe-uninitialized,)
+export CFLAGS_GCOV CFLAGS_KCOV
+
+# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
+# values of the respective KBUILD_* variables
+ARCH_CPPFLAGS :=
+ARCH_AFLAGS :=
+ARCH_CFLAGS :=
+include arch/$(SRCARCH)/Makefile
 
+ifeq ($(dot-config),1)
 ifeq ($(KBUILD_EXTMOD),)
-# Read in dependencies to all Kconfig* files, make sure to run
-# oldconfig if changes are detected.
+# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
+# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
+# because some architectures define CROSS_COMPILE there.
 -include include/config/auto.conf.cmd
 
 # To avoid any implicit rule to kick in, define an empty command
@@ -622,24 +646,6 @@ else
 include/config/auto.conf: ;
 endif # $(dot-config)
 
-# The all: target is the default when no target is given on the
-# command line.
-# This allow a user to issue only 'make' to build a kernel including modules
-# 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) \
-	$(call cc-disable-warning,maybe-uninitialized,)
-export CFLAGS_GCOV CFLAGS_KCOV
-
-# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
-# values of the respective KBUILD_* variables
-ARCH_CPPFLAGS :=
-ARCH_AFLAGS :=
-ARCH_CFLAGS :=
-include arch/$(SRCARCH)/Makefile
-
 KBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
 KBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
 KBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
-- 
cgit v1.2.3-59-g8ed1b


From 2a61f4747eeaa85ce26ca9fbd81421b15facd018 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 28 May 2018 18:22:00 +0900
Subject: stack-protector: test compiler capability in Kconfig and drop AUTO
 mode

Move the test for -fstack-protector(-strong) option to Kconfig.

If the compiler does not support the option, the corresponding menu
is automatically hidden.  If STRONG is not supported, it will fall
back to REGULAR.  If REGULAR is not supported, it will be disabled.
This means, AUTO is implicitly handled by the dependency solver of
Kconfig, hence removed.

I also turned the 'choice' into only two boolean symbols.  The use of
'choice' is not a good idea here, because all of all{yes,mod,no}config
would choose the first visible value, while we want allnoconfig to
disable as many features as possible.

X86 has additional shell scripts in case the compiler supports those
options, but generates broken code.  I added CC_HAS_SANE_STACKPROTECTOR
to test this.  I had to add -m32 to gcc-x86_32-has-stack-protector.sh
to make it work correctly.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Kees Cook <keescook@chromium.org>
---
 Makefile                                  | 93 ++-----------------------------
 arch/Kconfig                              | 32 ++++-------
 arch/x86/Kconfig                          | 11 +++-
 scripts/gcc-x86_32-has-stack-protector.sh |  7 +--
 scripts/gcc-x86_64-has-stack-protector.sh |  5 --
 5 files changed, 28 insertions(+), 120 deletions(-)

diff --git a/Makefile b/Makefile
index 747edaf11559..ca9d98b4a71b 100644
--- a/Makefile
+++ b/Makefile
@@ -686,55 +686,11 @@ ifneq ($(CONFIG_FRAME_WARN),0)
 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 endif
 
-# This selects the stack protector compiler flag. Testing it is delayed
-# until after .config has been reprocessed, in the prepare-compiler-check
-# target.
-ifdef CONFIG_CC_STACKPROTECTOR_AUTO
-  stackp-flag := $(call cc-option,-fstack-protector-strong,$(call cc-option,-fstack-protector))
-  stackp-name := AUTO
-else
-ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
-  stackp-flag := -fstack-protector
-  stackp-name := REGULAR
-else
-ifdef CONFIG_CC_STACKPROTECTOR_STRONG
-  stackp-flag := -fstack-protector-strong
-  stackp-name := STRONG
-else
-  # If either there is no stack protector for this architecture or
-  # CONFIG_CC_STACKPROTECTOR_NONE is selected, we're done, and $(stackp-name)
-  # is empty, skipping all remaining stack protector tests.
-  #
-  # Force off for distro compilers that enable stack protector by default.
-  KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
-endif
-endif
-endif
-# Find arch-specific stack protector compiler sanity-checking script.
-ifdef stackp-name
-ifneq ($(stackp-flag),)
-  stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
-  stackp-check := $(wildcard $(stackp-path))
-  # If the wildcard test matches a test script, run it to check functionality.
-  ifdef stackp-check
-    ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
-      stackp-broken := y
-    endif
-  endif
-  ifndef stackp-broken
-    # If the stack protector is functional, enable code that depends on it.
-    KBUILD_CPPFLAGS += -DCONFIG_CC_STACKPROTECTOR
-    # Either we've already detected the flag (for AUTO) or we'll fail the
-    # build in the prepare-compiler-check rule (for specific flag).
-    KBUILD_CFLAGS += $(stackp-flag)
-  else
-    # We have to make sure stack protector is unconditionally disabled if
-    # the compiler is broken (in case we're going to continue the build in
-    # AUTO mode).
-    KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
-  endif
-endif
-endif
+stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
+stackp-flags-$(CONFIG_CC_STACKPROTECTOR)          := -fstack-protector
+stackp-flags-$(CONFIG_CC_STACKPROTECTOR_STRONG)   := -fstack-protector-strong
+
+KBUILD_CFLAGS += $(stackp-flags-y)
 
 ifeq ($(cc-name),clang)
 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
@@ -1118,7 +1074,7 @@ endif
 # prepare2 creates a makefile if using a separate output directory.
 # From this point forward, .config has been reprocessed, so any rules
 # that need to depend on updated CONFIG_* values can be checked here.
-prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
+prepare2: prepare3 outputmakefile asm-generic
 
 prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
                    include/config/auto.conf
@@ -1144,43 +1100,6 @@ uapi-asm-generic:
 PHONY += prepare-objtool
 prepare-objtool: $(objtool_target)
 
-# Check for CONFIG flags that require compiler support. Abort the build
-# after .config has been processed, but before the kernel build starts.
-#
-# For security-sensitive CONFIG options, we don't want to fallback and/or
-# silently change which compiler flags will be used, since that leads to
-# producing kernels with different security feature characteristics
-# depending on the compiler used. (For example, "But I selected
-# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
-PHONY += prepare-compiler-check
-prepare-compiler-check: FORCE
-# Make sure compiler supports requested stack protector flag.
-ifdef stackp-name
-  # Warn about CONFIG_CC_STACKPROTECTOR_AUTO having found no option.
-  ifeq ($(stackp-flag),)
-	@echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
-		  Compiler does not support any known stack-protector >&2
-  else
-  # Fail if specifically requested stack protector is missing.
-  ifeq ($(call cc-option, $(stackp-flag)),)
-	@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
-		  $(stackp-flag) not supported by compiler >&2 && exit 1
-  endif
-  endif
-endif
-# Make sure compiler does not have buggy stack-protector support. If a
-# specific stack-protector was requested, fail the build, otherwise warn.
-ifdef stackp-broken
-  ifeq ($(stackp-name),AUTO)
-	@echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
-                  $(stackp-flag) available but compiler is broken: disabling >&2
-  else
-	@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
-                  $(stackp-flag) available but compiler is broken >&2 && exit 1
-  endif
-endif
-	@:
-
 # Generate some files
 # ---------------------------------------------------------------------------
 
diff --git a/arch/Kconfig b/arch/Kconfig
index 8a7f7e1f2ca7..2c7c3cf8adfc 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -536,13 +536,16 @@ config HAVE_CC_STACKPROTECTOR
 	bool
 	help
 	  An arch should select this symbol if:
-	  - its compiler supports the -fstack-protector option
 	  - it has implemented a stack canary (e.g. __stack_chk_guard)
 
-choice
-	prompt "Stack Protector buffer overflow detection"
+config CC_HAS_STACKPROTECTOR_NONE
+	def_bool $(cc-option,-fno-stack-protector)
+
+config CC_STACKPROTECTOR
+	bool "Stack Protector buffer overflow detection"
 	depends on HAVE_CC_STACKPROTECTOR
-	default CC_STACKPROTECTOR_AUTO
+	depends on $(cc-option,-fstack-protector)
+	default y
 	help
 	  This option turns on the "stack-protector" GCC feature. This
 	  feature puts, at the beginning of functions, a canary value on
@@ -552,14 +555,6 @@ choice
 	  overwrite the canary, which gets detected and the attack is then
 	  neutralized via a kernel panic.
 
-config CC_STACKPROTECTOR_NONE
-	bool "None"
-	help
-	  Disable "stack-protector" GCC feature.
-
-config CC_STACKPROTECTOR_REGULAR
-	bool "Regular"
-	help
 	  Functions will have the stack-protector canary logic added if they
 	  have an 8-byte or larger character array on the stack.
 
@@ -571,7 +566,10 @@ config CC_STACKPROTECTOR_REGULAR
 	  by about 0.3%.
 
 config CC_STACKPROTECTOR_STRONG
-	bool "Strong"
+	bool "Strong Stack Protector"
+	depends on CC_STACKPROTECTOR
+	depends on $(cc-option,-fstack-protector-strong)
+	default y
 	help
 	  Functions will have the stack-protector canary logic added in any
 	  of the following conditions:
@@ -589,14 +587,6 @@ config CC_STACKPROTECTOR_STRONG
 	  about 20% of all kernel functions, which increases the kernel code
 	  size by about 2%.
 
-config CC_STACKPROTECTOR_AUTO
-	bool "Automatic"
-	help
-	  If the compiler supports it, the best available stack-protector
-	  option will be chosen.
-
-endchoice
-
 config HAVE_ARCH_WITHIN_STACK_FRAMES
 	bool
 	help
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index cb6e3a219294..50a1b8ec9ad9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -129,7 +129,7 @@ config X86
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64
 	select HAVE_ARCH_VMAP_STACK		if X86_64
 	select HAVE_ARCH_WITHIN_STACK_FRAMES
-	select HAVE_CC_STACKPROTECTOR
+	select HAVE_CC_STACKPROTECTOR		if CC_HAS_SANE_STACKPROTECTOR
 	select HAVE_CMPXCHG_DOUBLE
 	select HAVE_CMPXCHG_LOCAL
 	select HAVE_CONTEXT_TRACKING		if X86_64
@@ -341,6 +341,15 @@ config PGTABLE_LEVELS
 	default 2
 
 source "init/Kconfig"
+
+config CC_HAS_SANE_STACKPROTECTOR
+	bool
+	default $(success,$(srctree)/scripts/gcc-x86_64-has-stack-protector.sh $(CC)) if 64BIT
+	default $(success,$(srctree)/scripts/gcc-x86_32-has-stack-protector.sh $(CC))
+	help
+	   We have to make sure stack protector is unconditionally disabled if
+	   the compiler produces broken code.
+
 source "kernel/Kconfig.freezer"
 
 menu "Processor type and features"
diff --git a/scripts/gcc-x86_32-has-stack-protector.sh b/scripts/gcc-x86_32-has-stack-protector.sh
index 6b2aeefb9cd3..f5c119495254 100755
--- a/scripts/gcc-x86_32-has-stack-protector.sh
+++ b/scripts/gcc-x86_32-has-stack-protector.sh
@@ -1,9 +1,4 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
 
-echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -O0 -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
-if [ "$?" -eq "0" ] ; then
-	echo y
-else
-	echo n
-fi
+echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -m32 -O0 -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
diff --git a/scripts/gcc-x86_64-has-stack-protector.sh b/scripts/gcc-x86_64-has-stack-protector.sh
index 4a48bdcd4d6b..3755af0cd9f7 100755
--- a/scripts/gcc-x86_64-has-stack-protector.sh
+++ b/scripts/gcc-x86_64-has-stack-protector.sh
@@ -2,8 +2,3 @@
 # SPDX-License-Identifier: GPL-2.0
 
 echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -O0 -mcmodel=kernel -fno-PIE -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
-if [ "$?" -eq "0" ] ; then
-	echo y
-else
-	echo n
-fi
-- 
cgit v1.2.3-59-g8ed1b


From a4353898980cc46b28c03fc401d4d916d82c6f4f Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 28 May 2018 18:22:01 +0900
Subject: kconfig: add CC_IS_GCC and GCC_VERSION

This will be useful to specify the required compiler version,
like this:

config FOO
        bool "Use Foo"
        depends on GCC_VERSION >= 40800
        help
          This feature requires GCC 4.8 or newer.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
 init/Kconfig | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/init/Kconfig b/init/Kconfig
index 22ca30f6a6bd..66c8fd1f1d8e 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -8,6 +8,14 @@ config DEFCONFIG_LIST
 	default ARCH_DEFCONFIG
 	default "arch/$(ARCH)/defconfig"
 
+config CC_IS_GCC
+	def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc)
+
+config GCC_VERSION
+	int
+	default $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') if CC_IS_GCC
+	default 0
+
 config CONSTRUCTORS
 	bool
 	depends on !UML
-- 
cgit v1.2.3-59-g8ed1b


From 469cb7376c067bc6203de4ceed253c10fe712542 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 28 May 2018 18:22:02 +0900
Subject: kconfig: add CC_IS_CLANG and CLANG_VERSION

This will be useful to describe the clang version dependency.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
 init/Kconfig             |  7 +++++++
 scripts/clang-version.sh | 18 ++++--------------
 2 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/init/Kconfig b/init/Kconfig
index 66c8fd1f1d8e..efc43c60de45 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -16,6 +16,13 @@ config GCC_VERSION
 	default $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') if CC_IS_GCC
 	default 0
 
+config CC_IS_CLANG
+	def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
+
+config CLANG_VERSION
+	int
+	default $(shell,$(srctree)/scripts/clang-version.sh $(CC))
+
 config CONSTRUCTORS
 	bool
 	depends on !UML
diff --git a/scripts/clang-version.sh b/scripts/clang-version.sh
index 9780efa56980..dbf0a31eb111 100755
--- a/scripts/clang-version.sh
+++ b/scripts/clang-version.sh
@@ -10,24 +10,14 @@
 # clang-5.0.1 etc.
 #
 
-if [ "$1" = "-p" ] ; then
-	with_patchlevel=1;
-	shift;
-fi
-
 compiler="$*"
 
-if [ ${#compiler} -eq 0 ]; then
-	echo "Error: No compiler specified."
-	printf "Usage:\n\t$0 <clang-command>\n"
+if !( $compiler --version | grep -q clang) ; then
+	echo 0
 	exit 1
 fi
 
 MAJOR=$(echo __clang_major__ | $compiler -E -x c - | tail -n 1)
 MINOR=$(echo __clang_minor__ | $compiler -E -x c - | tail -n 1)
-if [ "x$with_patchlevel" != "x" ] ; then
-	PATCHLEVEL=$(echo __clang_patchlevel__ | $compiler -E -x c - | tail -n 1)
-	printf "%02d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL
-else
-	printf "%02d%02d\\n" $MAJOR $MINOR
-fi
+PATCHLEVEL=$(echo __clang_patchlevel__ | $compiler -E -x c - | tail -n 1)
+printf "%d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL
-- 
cgit v1.2.3-59-g8ed1b


From f3a53f7b5740b0cd411262ee56a0fb7248199d3a Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Thu, 17 May 2018 15:17:10 +0900
Subject: arm64: move GCC version check for ARCH_SUPPORTS_INT128 to Kconfig

This becomes much neater in Kconfig.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
 arch/arm64/Kconfig  | 1 +
 arch/arm64/Makefile | 6 ------
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b25ed7834f6c..5a0cd6b6babb 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -43,6 +43,7 @@ config ARM64
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_SUPPORTS_MEMORY_FAILURE
 	select ARCH_SUPPORTS_ATOMIC_RMW
+	select ARCH_SUPPORTS_INT128 if GCC_VERSION >= 50000 || CC_IS_CLANG
 	select ARCH_SUPPORTS_NUMA_BALANCING
 	select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
 	select ARCH_WANT_FRAME_POINTERS
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 3c353b4715dc..45272266dafb 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -56,12 +56,6 @@ KBUILD_AFLAGS	+= $(lseinstr) $(brokengasinst)
 KBUILD_CFLAGS	+= $(call cc-option,-mabi=lp64)
 KBUILD_AFLAGS	+= $(call cc-option,-mabi=lp64)
 
-ifeq ($(cc-name),clang)
-KBUILD_CFLAGS	+= -DCONFIG_ARCH_SUPPORTS_INT128
-else
-KBUILD_CFLAGS	+= $(call cc-ifversion, -ge, 0500, -DCONFIG_ARCH_SUPPORTS_INT128)
-endif
-
 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
 KBUILD_CPPFLAGS	+= -mbig-endian
 CHECKFLAGS	+= -D__AARCH64EB__
-- 
cgit v1.2.3-59-g8ed1b


From 6a61b70b43c9c4cbc7314bf6c8b5ba8b0d6e1e7b Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 28 May 2018 18:22:03 +0900
Subject: gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT

CONFIG_GCOV_FORMAT_AUTODETECT compiles either gcc_3_4.c or gcc_4_7.c
according to your GCC version.

We can achieve the equivalent behavior by setting reasonable dependency
with the knowledge of the compiler version.

If GCC older than 4.7 is used, GCOV_FORMAT_3_4 is the default, but users
are still allowed to select GCOV_FORMAT_4_7 in case the newer format is
back-ported.

On the other hand, If GCC 4.7 or newer is used, there is no reason to
use GCOV_FORMAT_3_4, so it should be hidden.

If you downgrade the compiler to GCC 4.7 or older, oldconfig/syncconfig
will display a prompt for the choice because GCOV_FORMAT_3_4 becomes
visible as a new symbol.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
 kernel/gcov/Kconfig  | 17 +++++------------
 kernel/gcov/Makefile |  2 --
 2 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig
index 1276aabaab55..1e3823fa799b 100644
--- a/kernel/gcov/Kconfig
+++ b/kernel/gcov/Kconfig
@@ -53,23 +53,16 @@ config GCOV_PROFILE_ALL
 choice
 	prompt "Specify GCOV format"
 	depends on GCOV_KERNEL
-	default GCOV_FORMAT_AUTODETECT
 	---help---
-	The gcov format is usually determined by the GCC version, but there are
+	The gcov format is usually determined by the GCC version, and the
+	default is chosen according to your GCC version. However, there are
 	exceptions where format changes are integrated in lower-version GCCs.
-	In such a case use this option to adjust the format used in the kernel
-	accordingly.
-
-	If unsure, choose "Autodetect".
-
-config GCOV_FORMAT_AUTODETECT
-	bool "Autodetect"
-	---help---
-	Select this option to use the format that corresponds to your GCC
-	version.
+	In such a case, change this option to adjust the format used in the
+	kernel accordingly.
 
 config GCOV_FORMAT_3_4
 	bool "GCC 3.4 format"
+	depends on CC_IS_GCC && GCC_VERSION < 40700
 	---help---
 	Select this option to use the format defined by GCC 3.4.
 
diff --git a/kernel/gcov/Makefile b/kernel/gcov/Makefile
index c6c50e5c680e..ff06d64df397 100644
--- a/kernel/gcov/Makefile
+++ b/kernel/gcov/Makefile
@@ -4,5 +4,3 @@ ccflags-y := -DSRCTREE='"$(srctree)"' -DOBJTREE='"$(objtree)"'
 obj-y := base.o fs.o
 obj-$(CONFIG_GCOV_FORMAT_3_4) += gcc_3_4.o
 obj-$(CONFIG_GCOV_FORMAT_4_7) += gcc_4_7.o
-obj-$(CONFIG_GCOV_FORMAT_AUTODETECT) += $(call cc-ifversion, -lt, 0407, \
-							gcc_3_4.o, gcc_4_7.o)
-- 
cgit v1.2.3-59-g8ed1b


From 5aadfdeb8de001ca04d500586e3b033404c28617 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 28 May 2018 18:22:04 +0900
Subject: kcov: test compiler capability in Kconfig and correct dependency

As Documentation/kbuild/kconfig-language.txt notes, 'select' should be
be used with care - it forces a lower limit of another symbol, ignoring
the dependency.  Currently, KCOV can select GCC_PLUGINS even if arch
does not select HAVE_GCC_PLUGINS.  This could cause the unmet direct
dependency.

Now that Kconfig can test compiler capability, let's handle this in a
more sophisticated way.

There are two ways to enable KCOV; use the compiler that natively
supports -fsanitize-coverage=trace-pc, or build the SANCOV plugin if
the compiler has ability to build GCC plugins.  Hence, the correct
dependency for KCOV is:

  depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS

You do not need to build the SANCOV plugin if the compiler already
supports -fsanitize-coverage=trace-pc.  Hence, the select should be:

  select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC

With this, GCC_PLUGIN_SANCOV is selected only when necessary, so
scripts/Makefile.gcc-plugins can be cleaner.

I also cleaned up Kconfig and scripts/Makefile.kcov as well.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
 Makefile                     |  2 +-
 lib/Kconfig.debug            | 11 +++++++----
 scripts/Makefile.gcc-plugins |  8 ++------
 scripts/Makefile.kcov        | 10 ++++++----
 scripts/gcc-plugins/Makefile |  4 ----
 5 files changed, 16 insertions(+), 19 deletions(-)

diff --git a/Makefile b/Makefile
index ca9d98b4a71b..73f0bb2c7a98 100644
--- a/Makefile
+++ b/Makefile
@@ -601,7 +601,7 @@ all: vmlinux
 CFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
 	$(call cc-option,-fno-tree-loop-im) \
 	$(call cc-disable-warning,maybe-uninitialized,)
-export CFLAGS_GCOV CFLAGS_KCOV
+export CFLAGS_GCOV
 
 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
 # values of the respective KBUILD_* variables
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index eb885942eb0f..d543c65ce0eb 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -736,12 +736,15 @@ config ARCH_HAS_KCOV
 	  only for x86_64. KCOV requires testing on other archs, and most likely
 	  disabling of instrumentation for some early boot code.
 
+config CC_HAS_SANCOV_TRACE_PC
+	def_bool $(cc-option,-fsanitize-coverage=trace-pc)
+
 config KCOV
 	bool "Code coverage for fuzzing"
 	depends on ARCH_HAS_KCOV
+	depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS
 	select DEBUG_FS
-	select GCC_PLUGINS if !COMPILE_TEST
-	select GCC_PLUGIN_SANCOV if !COMPILE_TEST
+	select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC
 	help
 	  KCOV exposes kernel code coverage information in a form suitable
 	  for coverage-guided fuzzing (randomized testing).
@@ -755,7 +758,7 @@ config KCOV
 config KCOV_ENABLE_COMPARISONS
 	bool "Enable comparison operands collection by KCOV"
 	depends on KCOV
-	default n
+	depends on $(cc-option,-fsanitize-coverage=trace-cmp)
 	help
 	  KCOV also exposes operands of every comparison in the instrumented
 	  code along with operand sizes and PCs of the comparison instructions.
@@ -765,7 +768,7 @@ config KCOV_ENABLE_COMPARISONS
 config KCOV_INSTRUMENT_ALL
 	bool "Instrument all code by default"
 	depends on KCOV
-	default y if KCOV
+	default y
 	help
 	  If you are doing generic system call fuzzing (like e.g. syzkaller),
 	  then you will want to instrument the whole kernel and you should
diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins
index 7f5c86246138..708c8f6a5717 100644
--- a/scripts/Makefile.gcc-plugins
+++ b/scripts/Makefile.gcc-plugins
@@ -14,16 +14,12 @@ ifdef CONFIG_GCC_PLUGINS
   endif
 
   ifdef CONFIG_GCC_PLUGIN_SANCOV
-    ifeq ($(strip $(CFLAGS_KCOV)),)
       # It is needed because of the gcc-plugin.sh and gcc version checks.
       gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV)           += sancov_plugin.so
 
-      ifneq ($(PLUGINCC),)
-        CFLAGS_KCOV := $(SANCOV_PLUGIN)
-      else
+      ifeq ($(PLUGINCC),)
         $(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
       endif
-    endif
   endif
 
   gcc-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)	+= structleak_plugin.so
@@ -38,7 +34,7 @@ ifdef CONFIG_GCC_PLUGINS
   GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y))
 
   export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR
-  export SANCOV_PLUGIN DISABLE_LATENT_ENTROPY_PLUGIN
+  export DISABLE_LATENT_ENTROPY_PLUGIN
 
   ifneq ($(PLUGINCC),)
     # SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
diff --git a/scripts/Makefile.kcov b/scripts/Makefile.kcov
index 5cc72037e423..3d61c4bfcbee 100644
--- a/scripts/Makefile.kcov
+++ b/scripts/Makefile.kcov
@@ -1,7 +1,9 @@
 ifdef CONFIG_KCOV
-CFLAGS_KCOV	:= $(call cc-option,-fsanitize-coverage=trace-pc,)
-ifeq ($(CONFIG_KCOV_ENABLE_COMPARISONS),y)
-CFLAGS_KCOV += $(call cc-option,-fsanitize-coverage=trace-cmp,)
-endif
+
+kcov-flags-$(CONFIG_CC_HAS_SANCOV_TRACE_PC)	+= -fsanitize-coverage=trace-pc
+kcov-flags-$(CONFIG_KCOV_ENABLE_COMPARISONS)	+= -fsanitize-coverage=trace-cmp
+kcov-flags-$(CONFIG_GCC_PLUGIN_SANCOV)		+= -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
+
+export CFLAGS_KCOV := $(kcov-flags-y)
 
 endif
diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
index e2ff425f4c7e..ea465799ced5 100644
--- a/scripts/gcc-plugins/Makefile
+++ b/scripts/gcc-plugins/Makefile
@@ -13,10 +13,6 @@ else
   export HOST_EXTRACXXFLAGS
 endif
 
-ifneq ($(CFLAGS_KCOV), $(SANCOV_PLUGIN))
-  GCC_PLUGIN := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGIN))
-endif
-
 export HOSTLIBS
 
 $(obj)/randomize_layout_plugin.o: $(objtree)/$(obj)/randomize_layout_seed.h
-- 
cgit v1.2.3-59-g8ed1b


From 8034c2fb1225979b1cc9b9a12fa8094ca10b4fc3 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 28 May 2018 18:22:05 +0900
Subject: gcc-plugins: move GCC version check for PowerPC to Kconfig

For PowerPC, GCC 5.2 is the requirement for GCC plugins.  Move the
version check to Kconfig so that the GCC plugin menus will be hidden
if an older compiler is in use.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
 arch/powerpc/Kconfig         | 2 +-
 scripts/Makefile.gcc-plugins | 8 --------
 2 files changed, 1 insertion(+), 9 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 076fe3094856..737d333d4df2 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -189,7 +189,7 @@ config PPC
 	select HAVE_FTRACE_MCOUNT_RECORD
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_FUNCTION_TRACER
-	select HAVE_GCC_PLUGINS
+	select HAVE_GCC_PLUGINS			if GCC_VERSION >= 50200   # plugin support on gcc <= 5.1 is buggy on PPC
 	select HAVE_GENERIC_GUP
 	select HAVE_HW_BREAKPOINT		if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
 	select HAVE_IDE
diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins
index 708c8f6a5717..32bdf184eced 100644
--- a/scripts/Makefile.gcc-plugins
+++ b/scripts/Makefile.gcc-plugins
@@ -53,14 +53,6 @@ gcc-plugins-check: FORCE
 ifdef CONFIG_GCC_PLUGINS
   ifeq ($(PLUGINCC),)
     ifneq ($(GCC_PLUGINS_CFLAGS),)
-      # Various gccs between 4.5 and 5.1 have bugs on powerpc due to missing
-      # header files. gcc <= 4.6 doesn't work at all, gccs from 4.8 to 5.1 have
-      # issues with 64-bit targets.
-      ifeq ($(ARCH),powerpc)
-        ifeq ($(call cc-ifversion, -le, 0501, y), y)
-	  @echo "Cannot use CONFIG_GCC_PLUGINS: plugin support on gcc <= 5.1 is buggy on powerpc, please upgrade to gcc 5.2 or newer" >&2 && exit 1
-        endif
-      endif
       ifeq ($(call cc-ifversion, -ge, 0405, y), y)
 	$(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true
 	@echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1
-- 
cgit v1.2.3-59-g8ed1b


From 59f53855babf757ac7be19995670ab884aaf9b71 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 28 May 2018 18:22:06 +0900
Subject: gcc-plugins: test plugin support in Kconfig and clean up Makefile

Run scripts/gcc-plugin.sh from Kconfig so that users can enable
GCC_PLUGINS only when the compiler supports building plugins.

Kconfig defines a new symbol, PLUGIN_HOSTCC.  This will contain
the compiler (g++ or gcc) used for building plugins, or empty
if the plugin can not be supported at all.

This allows us to remove all ugly testing in Makefile.gcc-plugins.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Kees Cook <keescook@chromium.org>
---
 arch/Kconfig                 | 10 ++++++
 scripts/Kconfig.include      |  3 ++
 scripts/Makefile.gcc-plugins | 79 ++++++++++++--------------------------------
 scripts/gcc-plugins/Makefile |  1 +
 4 files changed, 36 insertions(+), 57 deletions(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index 2c7c3cf8adfc..e4a47d640a87 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -398,6 +398,15 @@ config SECCOMP_FILTER
 
 	  See Documentation/prctl/seccomp_filter.txt for details.
 
+preferred-plugin-hostcc := $(if-success,[ $(gcc-version) -ge 40800 ],$(HOSTCXX),$(HOSTCC))
+
+config PLUGIN_HOSTCC
+	string
+	default "$(shell,$(srctree)/scripts/gcc-plugin.sh "$(preferred-plugin-hostcc)" "$(HOSTCXX)" "$(CC)")"
+	help
+	  Host compiler used to build GCC plugins.  This can be $(HOSTCXX),
+	  $(HOSTCC), or a null string if GCC plugin is unsupported.
+
 config HAVE_GCC_PLUGINS
 	bool
 	help
@@ -407,6 +416,7 @@ config HAVE_GCC_PLUGINS
 menuconfig GCC_PLUGINS
 	bool "GCC plugins"
 	depends on HAVE_GCC_PLUGINS
+	depends on PLUGIN_HOSTCC != ""
 	depends on !COMPILE_TEST
 	help
 	  GCC plugins are loadable modules that provide extra features to the
diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
index bf7c0c9fa3a4..dad5583451af 100644
--- a/scripts/Kconfig.include
+++ b/scripts/Kconfig.include
@@ -25,3 +25,6 @@ cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null)
 # $(ld-option,<flag>)
 # Return y if the linker supports <flag>, n otherwise
 ld-option = $(success,$(LD) -v $(1))
+
+# gcc version including patch level
+gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//')
diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins
index 32bdf184eced..c961b9a65d11 100644
--- a/scripts/Makefile.gcc-plugins
+++ b/scripts/Makefile.gcc-plugins
@@ -1,72 +1,37 @@
 # SPDX-License-Identifier: GPL-2.0
-ifdef CONFIG_GCC_PLUGINS
-  __PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC))
-  PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
-
-  SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
-
-  gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY)	+= cyc_complexity_plugin.so
+gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY)	+= cyc_complexity_plugin.so
 
-  gcc-plugin-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY)	+= latent_entropy_plugin.so
-  gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY)	+= -DLATENT_ENTROPY_PLUGIN
-  ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY
+gcc-plugin-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY)	+= latent_entropy_plugin.so
+gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY)	+= -DLATENT_ENTROPY_PLUGIN
+ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY
     DISABLE_LATENT_ENTROPY_PLUGIN			+= -fplugin-arg-latent_entropy_plugin-disable
-  endif
-
-  ifdef CONFIG_GCC_PLUGIN_SANCOV
-      # It is needed because of the gcc-plugin.sh and gcc version checks.
-      gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV)           += sancov_plugin.so
-
-      ifeq ($(PLUGINCC),)
-        $(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
-      endif
-  endif
-
-  gcc-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)	+= structleak_plugin.so
-  gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE)	+= -fplugin-arg-structleak_plugin-verbose
-  gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL)	+= -fplugin-arg-structleak_plugin-byref-all
-  gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)	+= -DSTRUCTLEAK_PLUGIN
+endif
 
-  gcc-plugin-$(CONFIG_GCC_PLUGIN_RANDSTRUCT)	+= randomize_layout_plugin.so
-  gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT)	+= -DRANDSTRUCT_PLUGIN
-  gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE)	+= -fplugin-arg-randomize_layout_plugin-performance-mode
+gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV)		+= sancov_plugin.so
+gcc-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)	+= structleak_plugin.so
+gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE)	+= -fplugin-arg-structleak_plugin-verbose
+gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL)	+= -fplugin-arg-structleak_plugin-byref-all
+gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK)	+= -DSTRUCTLEAK_PLUGIN
 
-  GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y))
+gcc-plugin-$(CONFIG_GCC_PLUGIN_RANDSTRUCT)	+= randomize_layout_plugin.so
+gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT)	+= -DRANDSTRUCT_PLUGIN
+gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE)	+= -fplugin-arg-randomize_layout_plugin-performance-mode
 
-  export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR
-  export DISABLE_LATENT_ENTROPY_PLUGIN
+GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y))
 
-  ifneq ($(PLUGINCC),)
-    # SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
-    GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))
-  endif
+export GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR
+export DISABLE_LATENT_ENTROPY_PLUGIN
 
-  KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
-  GCC_PLUGIN := $(gcc-plugin-y)
-  GCC_PLUGIN_SUBDIR := $(gcc-plugin-subdir-y)
-endif
+# sancov_plugin.so can be only in CFLAGS_KCOV because avoid duplication.
+GCC_PLUGINS_CFLAGS := $(filter-out %/sancov_plugin.so, $(GCC_PLUGINS_CFLAGS))
 
-# If plugins aren't supported, abort the build before hard-to-read compiler
-# errors start getting spewed by the main build.
-PHONY += gcc-plugins-check
-gcc-plugins-check: FORCE
-ifdef CONFIG_GCC_PLUGINS
-  ifeq ($(PLUGINCC),)
-    ifneq ($(GCC_PLUGINS_CFLAGS),)
-      ifeq ($(call cc-ifversion, -ge, 0405, y), y)
-	$(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true
-	@echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1
-      else
-	@echo "Cannot use CONFIG_GCC_PLUGINS: your gcc version does not support plugins, you should upgrade it to at least gcc 4.5" >&2 && exit 1
-      endif
-    endif
-  endif
-endif
-	@:
+KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
+GCC_PLUGIN := $(gcc-plugin-y)
+GCC_PLUGIN_SUBDIR := $(gcc-plugin-subdir-y)
 
 # Actually do the build, if requested.
 PHONY += gcc-plugins
-gcc-plugins: scripts_basic gcc-plugins-check
+gcc-plugins: scripts_basic
 ifdef CONFIG_GCC_PLUGINS
 	$(Q)$(MAKE) $(build)=scripts/gcc-plugins
 endif
diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
index ea465799ced5..326254653bd0 100644
--- a/scripts/gcc-plugins/Makefile
+++ b/scripts/gcc-plugins/Makefile
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
+PLUGINCC := $(CONFIG_PLUGIN_HOSTCC:"%"=%)
 GCC_PLUGINS_DIR := $(shell $(CC) -print-file-name=plugin)
 
 ifeq ($(PLUGINCC),$(HOSTCC))
-- 
cgit v1.2.3-59-g8ed1b


From 1658dcee3d43edde9c971b6e88fee64ab9fc67e0 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 28 May 2018 18:22:07 +0900
Subject: gcc-plugins: allow to enable GCC_PLUGINS for COMPILE_TEST

Now that the compiler's plugin support is checked in Kconfig,
all{yes,mod}config will not be bothered.

Remove 'depends on !COMPILE_TEST' for GCC_PLUGINS.

'depends on !COMPILE_TEST' for the following three are still kept:
  GCC_PLUGIN_CYC_COMPLEXITY
  GCC_PLUGIN_STRUCTLEAK_VERBOSE
  GCC_PLUGIN_RANDSTRUCT_PERFORMANCE

Kees suggested to do so because the first two are too noisy, and the
last one would reduce the compile test coverage.  I commented the
reasons in arch/Kconfig.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Kees Cook <keescook@chromium.org>
---
 arch/Kconfig | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index e4a47d640a87..c2695293ca5b 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -417,7 +417,6 @@ menuconfig GCC_PLUGINS
 	bool "GCC plugins"
 	depends on HAVE_GCC_PLUGINS
 	depends on PLUGIN_HOSTCC != ""
-	depends on !COMPILE_TEST
 	help
 	  GCC plugins are loadable modules that provide extra features to the
 	  compiler. They are useful for runtime instrumentation and static analysis.
@@ -427,7 +426,7 @@ menuconfig GCC_PLUGINS
 config GCC_PLUGIN_CYC_COMPLEXITY
 	bool "Compute the cyclomatic complexity of a function" if EXPERT
 	depends on GCC_PLUGINS
-	depends on !COMPILE_TEST
+	depends on !COMPILE_TEST	# too noisy
 	help
 	  The complexity M of a function's control flow graph is defined as:
 	   M = E - N + 2P
@@ -494,7 +493,7 @@ config GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
 config GCC_PLUGIN_STRUCTLEAK_VERBOSE
 	bool "Report forcefully initialized variables"
 	depends on GCC_PLUGIN_STRUCTLEAK
-	depends on !COMPILE_TEST
+	depends on !COMPILE_TEST	# too noisy
 	help
 	  This option will cause a warning to be printed each time the
 	  structleak plugin finds a variable it thinks needs to be
@@ -534,7 +533,7 @@ config GCC_PLUGIN_RANDSTRUCT
 config GCC_PLUGIN_RANDSTRUCT_PERFORMANCE
 	bool "Use cacheline-aware structure randomization"
 	depends on GCC_PLUGIN_RANDSTRUCT
-	depends on !COMPILE_TEST
+	depends on !COMPILE_TEST	# do not reduce test coverage
 	help
 	  If you say Y here, the RANDSTRUCT randomization will make a
 	  best effort at restricting randomization to cacheline-sized
-- 
cgit v1.2.3-59-g8ed1b


From caa91ba53eb1c92d00abdf5b6c67a310d2b4c2d9 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Fri, 1 Jun 2018 13:32:00 +0900
Subject: gcc-plugins: disable GCC_PLUGIN_STRUCTLEAK_BYREF_ALL for COMPILE_TEST
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

We have enabled GCC_PLUGINS for COMPILE_TEST, but allmodconfig now
produces new warnings.

  CC [M]  drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.o
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c: In function ‘wlc_phy_workarounds_nphy_rev7’:
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16563:1: warning: the frame size of 3128 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c: In function ‘wlc_phy_workarounds_nphy_rev3’:
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:16905:1: warning: the frame size of 2800 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c: In function ‘wlc_phy_cal_txiqlo_nphy’:
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:26033:1: warning: the frame size of 2488 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^

It looks like GCC_PLUGIN_STRUCTLEAK_BYREF_ALL is causing this.
Add "depends on !COMPILE_TEST" to not dirturb the compile test.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
 arch/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/Kconfig b/arch/Kconfig
index c2695293ca5b..f62542e6dc55 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -486,6 +486,7 @@ config GCC_PLUGIN_STRUCTLEAK
 config GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
 	bool "Force initialize all struct type variables passed by reference"
 	depends on GCC_PLUGIN_STRUCTLEAK
+	depends on !COMPILE_TEST
 	help
 	  Zero initialize any struct type local variable that may be passed by
 	  reference without having been initialized.
-- 
cgit v1.2.3-59-g8ed1b


From 8373b7d9d174d577d93c6d4de46ae207f0b8d55b Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 28 May 2018 18:22:08 +0900
Subject: Documentation: kconfig: add recommended way to describe compiler
 support

It would be nice if the source code is written in the same style.
This proposes the convention for describing the compiler capability
in Kconfig.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
 Documentation/kbuild/kconfig-language.txt | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Documentation/kbuild/kconfig-language.txt b/Documentation/kbuild/kconfig-language.txt
index 0e966e8f9ec7..a4eb01843c04 100644
--- a/Documentation/kbuild/kconfig-language.txt
+++ b/Documentation/kbuild/kconfig-language.txt
@@ -473,6 +473,24 @@ config option to 'y' no matter the dependencies.
 The dependencies are moved to the symbol GENERIC_IOMAP and we avoid the
 situation where select forces a symbol equals to 'y'.
 
+Adding features that need compiler support
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+There are several features that need compiler support. The recommended way
+to describe the dependency on the compiler feature is to use "depends on"
+followed by a test macro.
+
+config CC_STACKPROTECTOR
+	bool "Stack Protector buffer overflow detection"
+	depends on $(cc-option,-fstack-protector)
+	...
+
+If you need to expose a compiler capability to makefiles and/or C source files,
+CC_HAS_ is the recommended prefix for the config option.
+
+config CC_HAS_STACKPROTECTOR_NONE
+	def_bool $(cc-option,-fno-stack-protector)
+
 Build as module only
 ~~~~~~~~~~~~~~~~~~~~
 To restrict a component build to module-only, qualify its config symbol
-- 
cgit v1.2.3-59-g8ed1b


From abba759796f9b73eb24df9b734dd063839fc62e0 Mon Sep 17 00:00:00 2001
From: Nicholas Piggin <npiggin@gmail.com>
Date: Wed, 30 May 2018 22:19:22 +1000
Subject: powerpc/kbuild: move -mprofile-kernel check to Kconfig

This eliminates the workaround that requires disabling
-mprofile-kernel by default in Kconfig.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
 arch/powerpc/Kconfig                            | 16 +---------------
 arch/powerpc/Makefile                           | 13 +------------
 arch/powerpc/include/asm/module.h               |  2 +-
 arch/powerpc/kernel/module_64.c                 |  4 ++--
 arch/powerpc/kernel/trace/ftrace.c              |  6 +++---
 arch/powerpc/tools/gcc-check-mprofile-kernel.sh |  1 -
 6 files changed, 8 insertions(+), 34 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 737d333d4df2..7b96e4c48cbd 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -459,23 +459,9 @@ config LD_HEAD_STUB_CATCH
 
 	  If unsure, say "N".
 
-config DISABLE_MPROFILE_KERNEL
-	bool "Disable use of mprofile-kernel for kernel tracing"
-	depends on PPC64 && CPU_LITTLE_ENDIAN
-	default y
-	help
-	  Selecting this options disables use of the mprofile-kernel ABI for
-	  kernel tracing. That will cause options such as live patching
-	  (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
-	  be disabled also.
-
-	  If you have a toolchain which supports mprofile-kernel, then you can
-	  disable this. Otherwise leave it enabled. If you're not sure, say
-	  "Y".
-
 config MPROFILE_KERNEL
 	depends on PPC64 && CPU_LITTLE_ENDIAN
-	def_bool !DISABLE_MPROFILE_KERNEL
+	def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)
 
 config HOTPLUG_CPU
 	bool "Support for enabling/disabling CPUs"
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 9b52e42e581b..bd06a3ccda31 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -161,18 +161,7 @@ CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 endif
 
 ifdef CONFIG_MPROFILE_KERNEL
-    ifeq ($(shell $(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK)
-        CC_FLAGS_FTRACE := -pg -mprofile-kernel
-        KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL
-    else
-        # If the user asked for mprofile-kernel but the toolchain doesn't
-        # support it, emit a warning and deliberately break the build later
-        # with mprofile-kernel-not-supported. We would prefer to make this an
-        # error right here, but then the user would never be able to run
-        # oldconfig to change their configuration.
-        $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL)
-        CC_FLAGS_FTRACE := -mprofile-kernel-not-supported
-    endif
+	CC_FLAGS_FTRACE := -pg -mprofile-kernel
 endif
 
 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
diff --git a/arch/powerpc/include/asm/module.h b/arch/powerpc/include/asm/module.h
index d8374f984f39..d61b0818e267 100644
--- a/arch/powerpc/include/asm/module.h
+++ b/arch/powerpc/include/asm/module.h
@@ -14,7 +14,7 @@
 #include <asm-generic/module.h>
 
 
-#ifdef CC_USING_MPROFILE_KERNEL
+#ifdef CONFIG_MPROFILE_KERNEL
 #define MODULE_ARCH_VERMAGIC_FTRACE	"mprofile-kernel "
 #else
 #define MODULE_ARCH_VERMAGIC_FTRACE	""
diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index 1b7419579820..b8d61e019d06 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -466,7 +466,7 @@ static unsigned long stub_for_addr(const Elf64_Shdr *sechdrs,
 	return (unsigned long)&stubs[i];
 }
 
-#ifdef CC_USING_MPROFILE_KERNEL
+#ifdef CONFIG_MPROFILE_KERNEL
 static bool is_mprofile_mcount_callsite(const char *name, u32 *instruction)
 {
 	if (strcmp("_mcount", name))
@@ -753,7 +753,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 
-#ifdef CC_USING_MPROFILE_KERNEL
+#ifdef CONFIG_MPROFILE_KERNEL
 
 #define PACATOC offsetof(struct paca_struct, kernel_toc)
 
diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c
index c076a32093fd..4bfbb54dee51 100644
--- a/arch/powerpc/kernel/trace/ftrace.c
+++ b/arch/powerpc/kernel/trace/ftrace.c
@@ -144,7 +144,7 @@ __ftrace_make_nop(struct module *mod,
 		return -EINVAL;
 	}
 
-#ifdef CC_USING_MPROFILE_KERNEL
+#ifdef CONFIG_MPROFILE_KERNEL
 	/* When using -mkernel_profile there is no load to jump over */
 	pop = PPC_INST_NOP;
 
@@ -188,7 +188,7 @@ __ftrace_make_nop(struct module *mod,
 		pr_err("Expected %08x found %08x\n", PPC_INST_LD_TOC, op);
 		return -EINVAL;
 	}
-#endif /* CC_USING_MPROFILE_KERNEL */
+#endif /* CONFIG_MPROFILE_KERNEL */
 
 	if (patch_instruction((unsigned int *)ip, pop)) {
 		pr_err("Patching NOP failed.\n");
@@ -324,7 +324,7 @@ int ftrace_make_nop(struct module *mod,
  * They should effectively be a NOP, and follow formal constraints,
  * depending on the ABI. Return false if they don't.
  */
-#ifndef CC_USING_MPROFILE_KERNEL
+#ifndef CONFIG_MPROFILE_KERNEL
 static int
 expected_nop_sequence(void *ip, unsigned int op0, unsigned int op1)
 {
diff --git a/arch/powerpc/tools/gcc-check-mprofile-kernel.sh b/arch/powerpc/tools/gcc-check-mprofile-kernel.sh
index a7dd0e5d9f98..137f3376ac2b 100755
--- a/arch/powerpc/tools/gcc-check-mprofile-kernel.sh
+++ b/arch/powerpc/tools/gcc-check-mprofile-kernel.sh
@@ -24,5 +24,4 @@ echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \
     2> /dev/null | grep -q "_mcount" && \
     exit 1
 
-echo "OK"
 exit 0
-- 
cgit v1.2.3-59-g8ed1b


From 2c4da1a78af5c50f3a866656fe223eb50b2a5ff0 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Wed, 9 May 2018 16:53:22 +0900
Subject: sh: remove no-op macro VMLINUX_SYMBOL()

VMLINUX_SYMBOL() is no-op unless CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
is defined.  It has ever been selected only by BLACKFIN and METAG.
VMLINUX_SYMBOL() is unneeded for SuperH-specific code.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
 arch/sh/include/asm/vmlinux.lds.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/sh/include/asm/vmlinux.lds.h b/arch/sh/include/asm/vmlinux.lds.h
index f312813f39d8..992955685874 100644
--- a/arch/sh/include/asm/vmlinux.lds.h
+++ b/arch/sh/include/asm/vmlinux.lds.h
@@ -7,9 +7,9 @@
 #ifdef CONFIG_DWARF_UNWINDER
 #define DWARF_EH_FRAME							\
 	.eh_frame : AT(ADDR(.eh_frame) - LOAD_OFFSET) {			\
-		  VMLINUX_SYMBOL(__start_eh_frame) = .;			\
+		  __start_eh_frame = .;					\
 		  *(.eh_frame)						\
-		  VMLINUX_SYMBOL(__stop_eh_frame) = .;			\
+		  __stop_eh_frame = .;					\
 	}
 #else
 #define DWARF_EH_FRAME
-- 
cgit v1.2.3-59-g8ed1b


From 8593080c0fcf88a2140f63626319dcdd06127fa0 Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <sam@ravnborg.org>
Date: Fri, 8 Jun 2018 23:48:31 +0200
Subject: kconfig: fix localmodconfig

When kconfig syntax moved to use $(FOO) for environment variables
localmodconfig was not updated.
Fix so it now works with the new syntax $(FOO)

Fixes: 104daea149c4 ("kconfig: reference environment variables directly and remove 'option env='")
Reported-by: Kevin Locke <kevin@kevinlocke.name>
Reported-by: Andrei Vagin <avagin@virtuozzo.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Tested-by: Kevin Locke <kevin@kevinlocke.name>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
 scripts/kconfig/streamline_config.pl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index a2e83ab17de3..4686531e2f8c 100755
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -165,10 +165,10 @@ sub read_kconfig {
     my $last_source = "";
 
     # Check for any environment variables used
-    while ($source =~ /\$(\w+)/ && $last_source ne $source) {
+    while ($source =~ /\$\((\w+)\)/ && $last_source ne $source) {
 	my $env = $1;
 	$last_source = $source;
-	$source =~ s/\$$env/$ENV{$env}/;
+	$source =~ s/\$\($env\)/$ENV{$env}/;
     }
 
     open(my $kinfile, '<', $source) || die "Can't open $kconfig";
-- 
cgit v1.2.3-59-g8ed1b


From 00979ce4fcc90d488c7f27f750097adc6b11bd07 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Mon, 11 Jun 2018 11:35:26 +0900
Subject: linux/linkage.h: replace VMLINUX_SYMBOL_STR() with __stringify()

With the special case handling for Blackfin and Metag was removed by
commit 94e58e0ac312 ("export.h: remove code for prefixing symbols with
underscore"), VMLINUX_SYMBOL_STR() is now equivalent to __stringify().

Replace the remaining usages in <linux/linkage.h> to prepare for the
entire removal of VMLINUX_SYMBOL_STR().

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
 include/linux/linkage.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index f68db9e450eb..d7618c41f74c 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -24,16 +24,16 @@
 
 #ifndef cond_syscall
 #define cond_syscall(x)	asm(				\
-	".weak " VMLINUX_SYMBOL_STR(x) "\n\t"		\
-	".set  " VMLINUX_SYMBOL_STR(x) ","		\
-		 VMLINUX_SYMBOL_STR(sys_ni_syscall))
+	".weak " __stringify(x) "\n\t"			\
+	".set  " __stringify(x) ","			\
+		 __stringify(sys_ni_syscall))
 #endif
 
 #ifndef SYSCALL_ALIAS
 #define SYSCALL_ALIAS(alias, name) asm(			\
-	".globl " VMLINUX_SYMBOL_STR(alias) "\n\t"	\
-	".set   " VMLINUX_SYMBOL_STR(alias) ","		\
-		  VMLINUX_SYMBOL_STR(name))
+	".globl " __stringify(alias) "\n\t"		\
+	".set   " __stringify(alias) ","		\
+		  __stringify(name))
 #endif
 
 #define __page_aligned_data	__section(.data..page_aligned) __aligned(PAGE_SIZE)
-- 
cgit v1.2.3-59-g8ed1b