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[98.128.228.147]) by smtp.gmail.com with ESMTPSA id q1sm205026lfp.42.2020.07.08.12.08.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Jul 2020 12:08:09 -0700 (PDT) From: Rikard Falkeborn To: torvalds@linux-foundation.org Cc: akpm@linux-foundation.org, andy.shevchenko@gmail.com, arnd@arndb.de, emil.l.velikov@gmail.com, geert@linux-m68k.org, keescook@chromium.org, linus.walleij@linaro.org, linux-kernel@vger.kernel.org, lkp@intel.com, mm-commits@vger.kernel.org, rikard.falkeborn@gmail.com, syednwaris@gmail.com, vilhelm.gray@gmail.com, yamada.masahiro@socionext.com, michal.lkml@markovi.net, linux-kbuild@vger.kernel.org Subject: [PATCH] kbuild: Move -Wtype-limits to W=2 Date: Wed, 8 Jul 2020 21:07:56 +0200 Message-Id: <20200708190756.16810-1-rikard.falkeborn@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org -Wtype-limits is included in -Wextra which is added at W=1. It warns (among other things) that 'comparison of an unsigned variable `< 0` is always false. This causes noisy warnings, especially when used in macros, hence it is more suitable for W=2. Signed-off-by: Rikard Falkeborn --- See also discussion at https://lore.kernel.org/lkml/CAHk-=wiKCXEWKJ9dWUimGbrVRo_N2RosESUw8E7m9AEtyZcu=w@mail.gmail.com/ scripts/Makefile.extrawarn | 2 ++ 1 file changed, 2 insertions(+) diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index 4aea7cf71d11..62c275685b75 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -35,6 +35,7 @@ KBUILD_CFLAGS += $(call cc-option, -Wstringop-truncation) # The following turn off the warnings enabled by -Wextra KBUILD_CFLAGS += -Wno-missing-field-initializers KBUILD_CFLAGS += -Wno-sign-compare +KBUILD_CFLAGS += -Wno-type-limits KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN1 @@ -66,6 +67,7 @@ KBUILD_CFLAGS += -Wshadow KBUILD_CFLAGS += $(call cc-option, -Wlogical-op) KBUILD_CFLAGS += -Wmissing-field-initializers KBUILD_CFLAGS += -Wsign-compare +KBUILD_CFLAGS += -Wtype-limits KBUILD_CFLAGS += $(call cc-option, -Wmaybe-uninitialized) KBUILD_CFLAGS += $(call cc-option, -Wunused-macros)