linux-kernel - [PATCH AUTOSEL 4.19 01/31] Makefile: disallow data races on gcc-10 as well

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Message-Id: <20200514185413.20755-1-sashal@kernel.org>
Date:   Thu, 14 May 2020 14:53:43 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Sergei Trofimovich <slyfox@...too.org>,
        Jiri Kosina <jkosina@...e.cz>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Sasha Levin <sashal@...nel.org>, linux-kbuild@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 01/31] Makefile: disallow data races on gcc-10 as well

From: Sergei Trofimovich <slyfox@...too.org>

[ Upstream commit b1112139a103b4b1101d0d2d72931f2d33d8c978 ]

gcc-10 will rename --param=allow-store-data-races=0
to -fno-allow-store-data-races.

The flag change happened at https://gcc.gnu.org/PR92046.

Signed-off-by: Sergei Trofimovich <slyfox@...too.org>
Acked-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile b/Makefile
index 68fa15edd662c..3008cf448649c 100644
--- a/Makefile
+++ b/Makefile
@@ -671,6 +671,7 @@ KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
 
 # Tell gcc to never replace conditional load with a non-conditional one
 KBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
+KBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
 
 include scripts/Makefile.kcov
 include scripts/Makefile.gcc-plugins
-- 
2.20.1