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From:   Rob Herring <robh@kernel.org>
Date:   Wed, 22 Nov 2023 15:12:33 -0700
Subject: [PATCH v2 2/4] kbuild: Allow arch/platform override of dtc warning
 level
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Message-Id: <20231122-dtc-warnings-v2-2-bd4087325392@kernel.org>
References: <20231122-dtc-warnings-v2-0-bd4087325392@kernel.org>
In-Reply-To: <20231122-dtc-warnings-v2-0-bd4087325392@kernel.org>
To:     Masahiro Yamada <masahiroy@kernel.org>,
        Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Nicolas Schier <nicolas@fjasle.eu>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Alim Akhtar <alim.akhtar@samsung.com>,
        Conor Dooley <conor@kernel.org>
Cc:     linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org, linux-riscv@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org,
        linux-samsung-soc@vger.kernel.org
Precedence: bulk

In order to allow enabling extra dtc warnings on a per arch or platform
basis, define a new variable, KBUILD_EXTRA_WARN_DTC, which contains the
warning level and can be set by an arch or platform independently of
KBUILD_EXTRA_WARN. The default value is KBUILD_EXTRA_WARN as before.

The platform setting and command line setting are merged. For example,
with a platform that defaults to W=1, one can run 'make W=2 dtbs' which
will enable both level 1 and 2 warnings.

Signed-off-by: Rob Herring <robh@kernel.org>
---
 scripts/Makefile.lib | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index a67f781ae8ee..53a74e53e0ca 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -341,8 +341,10 @@ quiet_cmd_gzip = GZIP    $@
 # ---------------------------------------------------------------------------
 DTC ?= $(objtree)/scripts/dtc/dtc
 
+KBUILD_EXTRA_WARN_DTC += $(KBUILD_EXTRA_WARN)
+
 # Disable noisy checks by default
-ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
+ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN_DTC)),)
 DTC_FLAGS += -Wno-unit_address_vs_reg \
 	-Wno-avoid_unnecessary_addr_size \
 	-Wno-alias_paths \
@@ -353,7 +355,7 @@ DTC_FLAGS += \
         -Wunique_unit_address_if_enabled
 endif
 
-ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)
+ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN_DTC)),)
 DTC_FLAGS += -Wnode_name_chars_strict \
 	-Wproperty_name_chars_strict
 else

-- 
2.42.0