linux-kernel - [PATCH 5.4 01/76] kbuild: enforce -Werror=return-type

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Message-Id: <20210118113341.059255538@linuxfoundation.org>
Date:   Mon, 18 Jan 2021 12:34:01 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Olaf Hering <olaf@...fle.de>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH 5.4 01/76] kbuild: enforce -Werror=return-type

From: Olaf Hering <olaf@...fle.de>

commit 172aad81a882443eefe1bd860c4eddc81b14dd5b upstream.

Catch errors which at least gcc tolerates by default:
 warning: 'return' with no value, in function returning non-void [-Wreturn-type]

Signed-off-by: Olaf Hering <olaf@...fle.de>
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
Cc: Nathan Chancellor <natechancellor@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/Makefile
+++ b/Makefile
@@ -480,7 +480,7 @@ KBUILD_AFLAGS   := -D__ASSEMBLY__ -fno-P
 KBUILD_CFLAGS   := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
 		   -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
 		   -Werror=implicit-function-declaration -Werror=implicit-int \
-		   -Wno-format-security \
+		   -Werror=return-type -Wno-format-security \
 		   -std=gnu89
 KBUILD_CPPFLAGS := -D__KERNEL__
 KBUILD_AFLAGS_KERNEL :=