linux-kernel - [PATCH 2/3] kcsan: Simplify compiler flags

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Date:   Thu, 18 Jun 2020 11:31:17 +0200
From:   Marco Elver <elver@...gle.com>
To:     elver@...gle.com, paulmck@...nel.org
Cc:     will@...nel.org, peterz@...radead.org, bp@...en8.de,
        tglx@...utronix.de, mingo@...nel.org, dvyukov@...gle.com,
        cai@....pw, kasan-dev@...glegroups.com,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] kcsan: Simplify compiler flags

Simplify the set of compiler flags for the runtime by removing cc-option
from -fno-stack-protector, because all supported compilers support it.
This saves us one compiler invocation during build.

Signed-off-by: Marco Elver <elver@...gle.com>
---
 kernel/kcsan/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/kcsan/Makefile b/kernel/kcsan/Makefile
index 092ce58d2e56..fea064afc4f7 100644
--- a/kernel/kcsan/Makefile
+++ b/kernel/kcsan/Makefile
@@ -7,8 +7,8 @@ CFLAGS_REMOVE_core.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_debugfs.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_report.o = $(CC_FLAGS_FTRACE)
 
-CFLAGS_core.o := $(call cc-option,-fno-conserve-stack,) \
-	$(call cc-option,-fno-stack-protector,)
+CFLAGS_core.o := $(call cc-option,-fno-conserve-stack) \
+	-fno-stack-protector
 
 obj-y := core.o debugfs.o report.o
 obj-$(CONFIG_KCSAN_SELFTEST) += selftest.o
-- 
2.27.0.290.gba653c62da-goog