linux-kernel - [PATCH] Makefile.kcov: apply needed compiler option unconditionally in CFLAGS

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Message-ID: <20250507133043.61905-1-lukas.bulwahn@redhat.com>
Date: Wed,  7 May 2025 15:30:43 +0200
From: Lukas Bulwahn <lbulwahn@...hat.com>
To: Masahiro Yamada <masahiroy@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas.schier@...ux.dev>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Andrey Konovalov <andreyknvl@...il.com>,
	Arnd Bergmann <arnd@...db.de>,
	linux-kbuild@...r.kernel.org,
	kasan-dev@...glegroups.com
Cc: kernel-janitors@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Lukas Bulwahn <lukas.bulwahn@...hat.com>
Subject: [PATCH] Makefile.kcov: apply needed compiler option unconditionally in CFLAGS_KCOV

From: Lukas Bulwahn <lukas.bulwahn@...hat.com>

Commit 852faf805539 ("gcc-plugins: remove SANCOV gcc plugin") removes the
config CC_HAS_SANCOV_TRACE_PC, as all supported compilers include the
compiler option '-fsanitize-coverage=trace-pc' by now.

The commit however misses the important use of this config option in
Makefile.kcov to add '-fsanitize-coverage=trace-pc' to CFLAGS_KCOV.
Include the compiler option '-fsanitize-coverage=trace-pc' unconditionally
to CFLAGS_KCOV, as all compilers provide that option now.

Fixes: 852faf805539 ("gcc-plugins: remove SANCOV gcc plugin")
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...hat.com>
---
 scripts/Makefile.kcov | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.kcov b/scripts/Makefile.kcov
index 67de7942b3e7..01616472f43e 100644
--- a/scripts/Makefile.kcov
+++ b/scripts/Makefile.kcov
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
-kcov-flags-$(CONFIG_CC_HAS_SANCOV_TRACE_PC)	+= -fsanitize-coverage=trace-pc
+kcov-flags-y					+= -fsanitize-coverage=trace-pc
 kcov-flags-$(CONFIG_KCOV_ENABLE_COMPARISONS)	+= -fsanitize-coverage=trace-cmp
 
 export CFLAGS_KCOV := $(kcov-flags-y)
-- 
2.49.0