linux-kernel - [PATCH v1] kbuild: enforce -Werror=return-type

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Message-Id: <20201005101026.21951-1-olaf@aepfle.de>
Date:   Mon,  5 Oct 2020 12:10:26 +0200
From:   Olaf Hering <olaf@...fle.de>
To:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Olaf Hering <olaf@...fle.de>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: [PATCH v1] kbuild: enforce -Werror=return-type

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>
---
 Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Makefile b/Makefile
index f84d7e4ca0be..7b2e63e7be18 100644
--- a/Makefile
+++ b/Makefile
@@ -942,6 +942,9 @@ KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
 # enforce correct pointer usage
 KBUILD_CFLAGS   += $(call cc-option,-Werror=incompatible-pointer-types)
 
+# enforce correct return type
+KBUILD_CFLAGS   += $(call cc-option,-Werror=return-type)
+
 # Require designated initializers for all marked structures
 KBUILD_CFLAGS   += $(call cc-option,-Werror=designated-init)