linux-kernel - [PATCH 2/2] MIPS: Loongson64: Wrap -mno-branch-likely with cc-option

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Date:   Thu, 20 Jan 2022 14:40:01 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Huacai Chen <chenhuacai@...nel.org>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        llvm@...ts.linux.dev, Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH 2/2] MIPS: Loongson64: Wrap -mno-branch-likely with cc-option

This flag is not supported by clang, which results in a warning:

  clang-14: warning: argument unused during compilation: '-mno-branch-likely' [-Wunused-command-line-argument]

This breaks cc-option, which adds -Werror to make this warning fatal and
catch flags that are not supported. Wrap the flag in cc-option so that
it does not cause cc-option to fail, which can cause randconfigs to be
really noisy.

Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
 arch/mips/loongson64/Platform | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/mips/loongson64/Platform b/arch/mips/loongson64/Platform
index 981d3abc150e..acf9edc9b15d 100644
--- a/arch/mips/loongson64/Platform
+++ b/arch/mips/loongson64/Platform
@@ -26,5 +26,6 @@ cflags-y += $(call cc-option,-mno-loongson-mmi)
 # Loongson Machines' Support
 #
 
-cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely
+cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64
+cflags-$(CONFIG_MACH_LOONGSON64) += $(call cc-option,-mno-branch-likely)
 load-$(CONFIG_CPU_LOONGSON64) += 0xffffffff80200000
-- 
2.34.1