linux-kernel - [PATCH 1/3] kbuild: Add -Wshadow to sparse

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Date:   Wed, 17 Oct 2018 19:05:52 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     tglx@...utronix.de, linux-kbuild@...r.kernel.org,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        linux-sparse@...r.kernel.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: [PATCH 1/3] kbuild: Add -Wshadow to sparse

I remember that `sparse' used to warn about shadowed variables but it
seems not to do it by default anymore. It was useful.

Enable `-Wshadow' while invoking sparse.

Cc: linux-sparse@...r.kernel.org
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: Michal Marek <michal.lkml@...kovi.net>
Cc: linux-kbuild@...r.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index bf3786e4ffece..0160c6b5dd45d 100644
--- a/Makefile
+++ b/Makefile
@@ -390,7 +390,7 @@ PYTHON3		= python3
 CHECK		= sparse
 
 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
-		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
+		  -Wbitwise -Wno-return-void -Wno-unknown-attribute -Wshadow $(CF)
 NOSTDINC_FLAGS  =
 CFLAGS_MODULE   =
 AFLAGS_MODULE   =
-- 
2.19.1