linux-kernel - [PATCH v2 2/2] kcov: Pass -fno-stack-protector with Clang

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Message-Id: <20200604145635.21565-2-elver@google.com>
Date:   Thu,  4 Jun 2020 16:56:35 +0200
From:   Marco Elver <elver@...gle.com>
To:     elver@...gle.com
Cc:     peterz@...radead.org, bp@...en8.de, tglx@...utronix.de,
        mingo@...nel.org, clang-built-linux@...glegroups.com,
        paulmck@...nel.org, dvyukov@...gle.com, glider@...gle.com,
        andreyknvl@...gle.com, kasan-dev@...glegroups.com,
        linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [PATCH v2 2/2] kcov: Pass -fno-stack-protector with Clang

For Clang, correctly pass -fno-stack-protector via a separate cc-option,
as -fno-conserve-stack does not exist with Clang.

Signed-off-by: Marco Elver <elver@...gle.com>
---
 kernel/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/Makefile b/kernel/Makefile
index ce8716a04d0e..82153c47d2a6 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -35,7 +35,7 @@ KCOV_INSTRUMENT_stacktrace.o := n
 KCOV_INSTRUMENT_kcov.o := n
 KASAN_SANITIZE_kcov.o := n
 KCSAN_SANITIZE_kcov.o := n
-CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack -fno-stack-protector)
+CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack) $(call cc-option, -fno-stack-protector)
 
 # cond_syscall is currently not LTO compatible
 CFLAGS_sys_ni.o = $(DISABLE_LTO)
-- 
2.27.0.rc2.251.g90737beb825-goog