linux-kernel - [PATCH] ARM: decompressor: use CONFIG option instead of cc-option

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Date:   Wed,  4 Dec 2019 13:28:12 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     patches@....linux.org.uk
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: decompressor: use CONFIG option instead of cc-option

The Kconfig stage (arch/Kconfig) has already evaluated whether the
compiler supports -fno-stack-protector.

You can use CONFIG_CC_HAS_STACKPROTECTOR_NONE instead of invoking
the compiler to check the flag here.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

KernelVersion: v5.5-rc1


 arch/arm/boot/compressed/Makefile | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
index a1e883c5e5c4..da599c3a1193 100644
--- a/arch/arm/boot/compressed/Makefile
+++ b/arch/arm/boot/compressed/Makefile
@@ -110,12 +110,12 @@ endif
 
 # -fstack-protector-strong triggers protection checks in this code,
 # but it is being used too early to link to meaningful stack_chk logic.
-nossp_flags := $(call cc-option, -fno-stack-protector)
-CFLAGS_atags_to_fdt.o := $(nossp_flags)
-CFLAGS_fdt.o := $(nossp_flags)
-CFLAGS_fdt_ro.o := $(nossp_flags)
-CFLAGS_fdt_rw.o := $(nossp_flags)
-CFLAGS_fdt_wip.o := $(nossp_flags)
+nossp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
+CFLAGS_atags_to_fdt.o := $(nossp-flags-y)
+CFLAGS_fdt.o := $(nossp-flags-y)
+CFLAGS_fdt_ro.o := $(nossp-flags-y)
+CFLAGS_fdt_rw.o := $(nossp-flags-y)
+CFLAGS_fdt_wip.o := $(nossp-flags-y)
 
 ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin -I$(obj)
 asflags-y := -DZIMAGE
-- 
2.17.1