[v4,1/4] ARM: remove lazy evaluation in Makefile

Message ID	20221014201354.3190007-2-ndesaulniers@google.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org> Date: Fri, 14 Oct 2022 13:13:51 -0700 In-Reply-To: <20221014201354.3190007-1-ndesaulniers@google.com> Mime-Version: 1.0 References: <20221014201354.3190007-1-ndesaulniers@google.com> Message-ID: <20221014201354.3190007-2-ndesaulniers@google.com> Subject: [PATCH v4 1/4] ARM: remove lazy evaluation in Makefile From: Nick Desaulniers <ndesaulniers@google.com> To: Russell King <rmk+kernel@armlinux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de>, Ard Biesheuvel <ardb@kernel.org>, Masahiro Yamada <masahiroy@kernel.org>, Linus Walleij <linus.walleij@linaro.org>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Nathan Chancellor <nathan@kernel.org>, Nick Desaulniers <ndesaulniers@google.com> Precedence: list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org
Series	pass -march= only to compiler \| expand [v4,0/4] pass -march= only to compiler [v4,1/4] ARM: remove lazy evaluation in Makefile [v4,2/4] ARM: use .arch directives instead of assembler command line flags [v4,3/4] ARM: only use -mtp=cp15 for the compiler [v4,4/4] ARM: pass -march= only to compiler

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20221014201354.3190007-2-ndesaulniers@google.com (mailing list archive)

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Date: Fri, 14 Oct 2022 13:13:51 -0700
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Subject: [PATCH v4 1/4] ARM: remove lazy evaluation in Makefile
From: Nick Desaulniers <ndesaulniers@google.com>
To: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>, Ard Biesheuvel <ardb@kernel.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
 Linus Walleij <linus.walleij@linaro.org>,
	linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
	llvm@lists.linux.dev, Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>
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Series

pass -march= only to compiler | expand

Commit Message

Nick Desaulniers Oct. 14, 2022, 8:13 p.m. UTC

arch-y and tune-y used lazy evaluation since they used to contain
cc-option checks. They don't any longer, so just eagerly evaluate these
command line flags.

Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
---
No change from v3.

 arch/arm/Makefile | 60 +++++++++++++++++++++--------------------------
 1 file changed, 27 insertions(+), 33 deletions(-)

Comments

Nathan Chancellor Oct. 14, 2022, 9:18 p.m. UTC | #1

On Fri, Oct 14, 2022 at 01:13:51PM -0700, Nick Desaulniers wrote:
> arch-y and tune-y used lazy evaluation since they used to contain
> cc-option checks. They don't any longer, so just eagerly evaluate these
> command line flags.
> 
> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>

Reviewed-by: Nathan Chancellor <nathan@kernel.org>

> ---
> No change from v3.
> 
>  arch/arm/Makefile | 60 +++++++++++++++++++++--------------------------
>  1 file changed, 27 insertions(+), 33 deletions(-)
> 
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index c846119c448f..8dd943b50b7d 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -63,44 +63,38 @@ KBUILD_CFLAGS	+= $(call cc-option,-fno-ipa-sra)
>  # Note that GCC does not numerically define an architecture version
>  # macro, but instead defines a whole series of macros which makes
>  # testing for a specific architecture or later rather impossible.
> -arch-$(CONFIG_CPU_32v7M)	=-D__LINUX_ARM_ARCH__=7 -march=armv7-m
> -arch-$(CONFIG_CPU_32v7)		=-D__LINUX_ARM_ARCH__=7 -march=armv7-a
> -arch-$(CONFIG_CPU_32v6)		=-D__LINUX_ARM_ARCH__=6 -march=armv6
> -# Only override the compiler option if ARMv6. The ARMv6K extensions are
> +arch-$(CONFIG_CPU_32v7M)	:=-D__LINUX_ARM_ARCH__=7 -march=armv7-m
> +arch-$(CONFIG_CPU_32v7)		:=-D__LINUX_ARM_ARCH__=7 -march=armv7-a
> +arch-$(CONFIG_CPU_32v6)		:=-D__LINUX_ARM_ARCH__=6 -march=armv6
> +# Only override the compiler opt:ion if ARMv6. The ARMv6K extensions are
>  # always available in ARMv7
>  ifeq ($(CONFIG_CPU_32v6),y)
> -arch-$(CONFIG_CPU_32v6K)	=-D__LINUX_ARM_ARCH__=6 -march=armv6k
> +arch-$(CONFIG_CPU_32v6K)	:=-D__LINUX_ARM_ARCH__=6 -march=armv6k
>  endif
> -arch-$(CONFIG_CPU_32v5)		=-D__LINUX_ARM_ARCH__=5 -march=armv5te
> -arch-$(CONFIG_CPU_32v4T)	=-D__LINUX_ARM_ARCH__=4 -march=armv4t
> -arch-$(CONFIG_CPU_32v4)		=-D__LINUX_ARM_ARCH__=4 -march=armv4
> -arch-$(CONFIG_CPU_32v3)		=-D__LINUX_ARM_ARCH__=3 -march=armv3m
> -
> -# Evaluate arch cc-option calls now
> -arch-y := $(arch-y)
> +arch-$(CONFIG_CPU_32v5)		:=-D__LINUX_ARM_ARCH__=5 -march=armv5te
> +arch-$(CONFIG_CPU_32v4T)	:=-D__LINUX_ARM_ARCH__=4 -march=armv4t
> +arch-$(CONFIG_CPU_32v4)		:=-D__LINUX_ARM_ARCH__=4 -march=armv4
> +arch-$(CONFIG_CPU_32v3)		:=-D__LINUX_ARM_ARCH__=3 -march=armv3m
>  
>  # This selects how we optimise for the processor.
> -tune-$(CONFIG_CPU_ARM7TDMI)	=-mtune=arm7tdmi
> -tune-$(CONFIG_CPU_ARM720T)	=-mtune=arm7tdmi
> -tune-$(CONFIG_CPU_ARM740T)	=-mtune=arm7tdmi
> -tune-$(CONFIG_CPU_ARM9TDMI)	=-mtune=arm9tdmi
> -tune-$(CONFIG_CPU_ARM940T)	=-mtune=arm9tdmi
> -tune-$(CONFIG_CPU_ARM946E)	=-mtune=arm9e
> -tune-$(CONFIG_CPU_ARM920T)	=-mtune=arm9tdmi
> -tune-$(CONFIG_CPU_ARM922T)	=-mtune=arm9tdmi
> -tune-$(CONFIG_CPU_ARM925T)	=-mtune=arm9tdmi
> -tune-$(CONFIG_CPU_ARM926T)	=-mtune=arm9tdmi
> -tune-$(CONFIG_CPU_FA526)	=-mtune=arm9tdmi
> -tune-$(CONFIG_CPU_SA110)	=-mtune=strongarm110
> -tune-$(CONFIG_CPU_SA1100)	=-mtune=strongarm1100
> -tune-$(CONFIG_CPU_XSCALE)	=-mtune=xscale
> -tune-$(CONFIG_CPU_XSC3)		=-mtune=xscale
> -tune-$(CONFIG_CPU_FEROCEON)	=-mtune=xscale
> -tune-$(CONFIG_CPU_V6)		=-mtune=arm1136j-s
> -tune-$(CONFIG_CPU_V6K)		=-mtune=arm1136j-s
> -
> -# Evaluate tune cc-option calls now
> -tune-y := $(tune-y)
> +tune-$(CONFIG_CPU_ARM7TDMI)	:=-mtune=arm7tdmi
> +tune-$(CONFIG_CPU_ARM720T)	:=-mtune=arm7tdmi
> +tune-$(CONFIG_CPU_ARM740T)	:=-mtune=arm7tdmi
> +tune-$(CONFIG_CPU_ARM9TDMI)	:=-mtune=arm9tdmi
> +tune-$(CONFIG_CPU_ARM940T)	:=-mtune=arm9tdmi
> +tune-$(CONFIG_CPU_ARM946E)	:=-mtune=arm9e
> +tune-$(CONFIG_CPU_ARM920T)	:=-mtune=arm9tdmi
> +tune-$(CONFIG_CPU_ARM922T)	:=-mtune=arm9tdmi
> +tune-$(CONFIG_CPU_ARM925T)	:=-mtune=arm9tdmi
> +tune-$(CONFIG_CPU_ARM926T)	:=-mtune=arm9tdmi
> +tune-$(CONFIG_CPU_FA526)	:=-mtune=arm9tdmi
> +tune-$(CONFIG_CPU_SA110)	:=-mtune=strongarm110
> +tune-$(CONFIG_CPU_SA1100)	:=-mtune=strongarm1100
> +tune-$(CONFIG_CPU_XSCALE)	:=-mtune=xscale
> +tune-$(CONFIG_CPU_XSC3)		:=-mtune=xscale
> +tune-$(CONFIG_CPU_FEROCEON)	:=-mtune=xscale
> +tune-$(CONFIG_CPU_V6)		:=-mtune=arm1136j-s
> +tune-$(CONFIG_CPU_V6K)		:=-mtune=arm1136j-s
>  
>  ifeq ($(CONFIG_AEABI),y)
>  CFLAGS_ABI	:=-mabi=aapcs-linux -mfpu=vfp
> -- 
> 2.38.0.413.g74048e4d9e-goog
> 
>

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index c846119c448f..8dd943b50b7d 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -63,44 +63,38 @@  KBUILD_CFLAGS	+= $(call cc-option,-fno-ipa-sra)
 # Note that GCC does not numerically define an architecture version
 # macro, but instead defines a whole series of macros which makes
 # testing for a specific architecture or later rather impossible.
-arch-$(CONFIG_CPU_32v7M)	=-D__LINUX_ARM_ARCH__=7 -march=armv7-m
-arch-$(CONFIG_CPU_32v7)		=-D__LINUX_ARM_ARCH__=7 -march=armv7-a
-arch-$(CONFIG_CPU_32v6)		=-D__LINUX_ARM_ARCH__=6 -march=armv6
-# Only override the compiler option if ARMv6. The ARMv6K extensions are
+arch-$(CONFIG_CPU_32v7M)	:=-D__LINUX_ARM_ARCH__=7 -march=armv7-m
+arch-$(CONFIG_CPU_32v7)		:=-D__LINUX_ARM_ARCH__=7 -march=armv7-a
+arch-$(CONFIG_CPU_32v6)		:=-D__LINUX_ARM_ARCH__=6 -march=armv6
+# Only override the compiler opt:ion if ARMv6. The ARMv6K extensions are
 # always available in ARMv7
 ifeq ($(CONFIG_CPU_32v6),y)
-arch-$(CONFIG_CPU_32v6K)	=-D__LINUX_ARM_ARCH__=6 -march=armv6k
+arch-$(CONFIG_CPU_32v6K)	:=-D__LINUX_ARM_ARCH__=6 -march=armv6k
 endif
-arch-$(CONFIG_CPU_32v5)		=-D__LINUX_ARM_ARCH__=5 -march=armv5te
-arch-$(CONFIG_CPU_32v4T)	=-D__LINUX_ARM_ARCH__=4 -march=armv4t
-arch-$(CONFIG_CPU_32v4)		=-D__LINUX_ARM_ARCH__=4 -march=armv4
-arch-$(CONFIG_CPU_32v3)		=-D__LINUX_ARM_ARCH__=3 -march=armv3m
-
-# Evaluate arch cc-option calls now
-arch-y := $(arch-y)
+arch-$(CONFIG_CPU_32v5)		:=-D__LINUX_ARM_ARCH__=5 -march=armv5te
+arch-$(CONFIG_CPU_32v4T)	:=-D__LINUX_ARM_ARCH__=4 -march=armv4t
+arch-$(CONFIG_CPU_32v4)		:=-D__LINUX_ARM_ARCH__=4 -march=armv4
+arch-$(CONFIG_CPU_32v3)		:=-D__LINUX_ARM_ARCH__=3 -march=armv3m
 
 # This selects how we optimise for the processor.
-tune-$(CONFIG_CPU_ARM7TDMI)	=-mtune=arm7tdmi
-tune-$(CONFIG_CPU_ARM720T)	=-mtune=arm7tdmi
-tune-$(CONFIG_CPU_ARM740T)	=-mtune=arm7tdmi
-tune-$(CONFIG_CPU_ARM9TDMI)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM940T)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM946E)	=-mtune=arm9e
-tune-$(CONFIG_CPU_ARM920T)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM922T)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM925T)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_ARM926T)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_FA526)	=-mtune=arm9tdmi
-tune-$(CONFIG_CPU_SA110)	=-mtune=strongarm110
-tune-$(CONFIG_CPU_SA1100)	=-mtune=strongarm1100
-tune-$(CONFIG_CPU_XSCALE)	=-mtune=xscale
-tune-$(CONFIG_CPU_XSC3)		=-mtune=xscale
-tune-$(CONFIG_CPU_FEROCEON)	=-mtune=xscale
-tune-$(CONFIG_CPU_V6)		=-mtune=arm1136j-s
-tune-$(CONFIG_CPU_V6K)		=-mtune=arm1136j-s
-
-# Evaluate tune cc-option calls now
-tune-y := $(tune-y)
+tune-$(CONFIG_CPU_ARM7TDMI)	:=-mtune=arm7tdmi
+tune-$(CONFIG_CPU_ARM720T)	:=-mtune=arm7tdmi
+tune-$(CONFIG_CPU_ARM740T)	:=-mtune=arm7tdmi
+tune-$(CONFIG_CPU_ARM9TDMI)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM940T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM946E)	:=-mtune=arm9e
+tune-$(CONFIG_CPU_ARM920T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM922T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM925T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_ARM926T)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_FA526)	:=-mtune=arm9tdmi
+tune-$(CONFIG_CPU_SA110)	:=-mtune=strongarm110
+tune-$(CONFIG_CPU_SA1100)	:=-mtune=strongarm1100
+tune-$(CONFIG_CPU_XSCALE)	:=-mtune=xscale
+tune-$(CONFIG_CPU_XSC3)		:=-mtune=xscale
+tune-$(CONFIG_CPU_FEROCEON)	:=-mtune=xscale
+tune-$(CONFIG_CPU_V6)		:=-mtune=arm1136j-s
+tune-$(CONFIG_CPU_V6K)		:=-mtune=arm1136j-s
 
 ifeq ($(CONFIG_AEABI),y)
 CFLAGS_ABI	:=-mabi=aapcs-linux -mfpu=vfp

[v4,1/4] ARM: remove lazy evaluation in Makefile

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