From patchwork Tue Mar 5 09:07:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jani Nikula X-Patchwork-Id: 13581895 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 61A0DC54E41 for ; Tue, 5 Mar 2024 09:08:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9F9B8112965; Tue, 5 Mar 2024 09:08:14 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="fSq7sZoy"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) by gabe.freedesktop.org (Postfix) with ESMTPS id A9FEA112961; Tue, 5 Mar 2024 09:08:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709629694; x=1741165694; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=wzYFNtx7zLeQY6iBKd0/CpOTEBO8l6cBYy3paFEeuXM=; b=fSq7sZoys3PsdArtUnKnhyy7FTWEmIS0oICYGEkhYZ6T96FSlKwkk/l/ vX7PoLHAzjK6pw/s5z9NgLSSjoOx3/GBIKBSwYqzwVNfO9cERcFtCYc9c A86ny45VlxaCv05GFUjH/HS9/Mx0GDSnyd8GioD/bs8UyP5OFNvtH6M2/ TkVpZxwg5hi3mXuAV5j6EYTa2WD4BX4Igk0cIlUjaz8+fAITSG3GKK0gt dHMjm0lGKUR7rwJ+DBjW/4IqTSY3RciVAgRuvGDKWdP34/rKJKaccLqoa iqoBghTfht7oKr/3x6JKDLHZLZmmCxCOtxLyPryTcN+KfdP+eP6wIYgo3 Q==; X-IronPort-AV: E=McAfee;i="6600,9927,11003"; a="4027070" X-IronPort-AV: E=Sophos;i="6.06,205,1705392000"; d="scan'208";a="4027070" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2024 01:08:12 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,205,1705392000"; d="scan'208";a="9427404" Received: from omakhlou-mobl4.amr.corp.intel.com (HELO localhost) ([10.252.51.143]) by fmviesa008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 05 Mar 2024 01:07:50 -0800 From: Jani Nikula To: dri-devel@lists.freedesktop.org Cc: Jani Nikula , intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, David Airlie , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , "Pan, Xinhui" , Karol Herbst , Lyude Paul , Danilo Krummrich , Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , Marijn Suijten , Hamza Mahfooz , Javier Martinez Canillas , Sui Jingfeng , Pan@freedesktop.org Subject: [RESEND v3 1/2] drm: enable (most) W=1 warnings by default across the subsystem Date: Tue, 5 Mar 2024 11:07:35 +0200 Message-Id: X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" At least the i915 and amd drivers enable a bunch more compiler warnings than the kernel defaults. Extend most of the W=1 warnings to the entire drm subsystem by default. Use the copy-pasted warnings from scripts/Makefile.extrawarn with s/KBUILD_CFLAGS/subdir-ccflags-y/ to make it easier to compare and keep up with them in the future. This is similar to the approach currently used in i915. Some of the -Wextra warnings do need to be disabled, just like in Makefile.extrawarn, but take care to not disable them for W=2 or W=3 builds, depending on the warning. There are too many -Wformat-truncation warnings to cleanly fix up front; leave that warning disabled for now. v3: - Drop -Wmissing-declarations (already enabled by default) - Drop -Wmissing-prototypes (already enabled by default) v2: - Drop -Wformat-truncation (too many warnings) - Drop -Wstringop-overflow (already enabled by default) Cc: David Airlie Cc: Daniel Vetter Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: Alex Deucher Cc: Christian König Cc: Pan, Xinhui Cc: Karol Herbst Cc: Lyude Paul Cc: Rob Clark Cc: Abhinav Kumar Cc: Dmitry Baryshkov Cc: Sean Paul Cc: Marijn Suijten Cc: Hamza Mahfooz Acked-by: Javier Martinez Canillas Acked-by: Thomas Zimmermann Acked-by: Sui Jingfeng Acked-by: Danilo Krummrich Signed-off-by: Jani Nikula --- drivers/gpu/drm/Makefile | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 6eb2b553a163..ea456f057e8a 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -5,6 +5,31 @@ CFLAGS-$(CONFIG_DRM_USE_DYNAMIC_DEBUG) += -DDYNAMIC_DEBUG_MODULE +# Unconditionally enable W=1 warnings locally +# --- begin copy-paste W=1 warnings from scripts/Makefile.extrawarn +subdir-ccflags-y += -Wextra -Wunused -Wno-unused-parameter +subdir-ccflags-y += $(call cc-option, -Wrestrict) +subdir-ccflags-y += -Wmissing-format-attribute +subdir-ccflags-y += -Wold-style-definition +subdir-ccflags-y += -Wmissing-include-dirs +subdir-ccflags-y += $(call cc-option, -Wunused-but-set-variable) +subdir-ccflags-y += $(call cc-option, -Wunused-const-variable) +subdir-ccflags-y += $(call cc-option, -Wpacked-not-aligned) +subdir-ccflags-y += $(call cc-option, -Wformat-overflow) +# FIXME: fix -Wformat-truncation warnings and uncomment +#subdir-ccflags-y += $(call cc-option, -Wformat-truncation) +subdir-ccflags-y += $(call cc-option, -Wstringop-truncation) +# The following turn off the warnings enabled by -Wextra +ifeq ($(findstring 2, $(KBUILD_EXTRA_WARN)),) +subdir-ccflags-y += -Wno-missing-field-initializers +subdir-ccflags-y += -Wno-type-limits +subdir-ccflags-y += -Wno-shift-negative-value +endif +ifeq ($(findstring 3, $(KBUILD_EXTRA_WARN)),) +subdir-ccflags-y += -Wno-sign-compare +endif +# --- end copy-paste + drm-y := \ drm_aperture.o \ drm_atomic.o \ From patchwork Tue Mar 5 09:07:36 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jani Nikula X-Patchwork-Id: 13581896 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 39F4FC54E41 for ; Tue, 5 Mar 2024 09:08:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5E505112968; Tue, 5 Mar 2024 09:08:15 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="bPDpcUJQ"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) by gabe.freedesktop.org (Postfix) with ESMTPS id E4265112963; Tue, 5 Mar 2024 09:08:13 +0000 (UTC) DKIM-Signature: v=1; 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05 Mar 2024 01:08:04 -0800 From: Jani Nikula To: dri-devel@lists.freedesktop.org Cc: Jani Nikula , intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, David Airlie , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , "Pan, Xinhui" , Karol Herbst , Lyude Paul , Danilo Krummrich , Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , Marijn Suijten , Hamza Mahfooz , Javier Martinez Canillas , Sui Jingfeng Subject: [RESEND v3 2/2] drm: Add CONFIG_DRM_WERROR Date: Tue, 5 Mar 2024 11:07:36 +0200 Message-Id: X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add kconfig to enable -Werror subsystem wide. This is useful for development and CI to keep the subsystem warning free, while avoiding issues outside of the subsystem that kernel wide CONFIG_WERROR=y might hit. v2: Don't depend on COMPILE_TEST Reviewed-by: Hamza Mahfooz # v1 Signed-off-by: Jani Nikula Reviewed-by: Javier Martinez Canillas --- drivers/gpu/drm/Kconfig | 13 +++++++++++++ drivers/gpu/drm/Makefile | 3 +++ 2 files changed, 16 insertions(+) diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index 6e853acf15da..c08e18108c2a 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -416,3 +416,16 @@ config DRM_LIB_RANDOM config DRM_PRIVACY_SCREEN bool default n + +config DRM_WERROR + bool "Compile the drm subsystem with warnings as errors" + depends on EXPERT + default n + help + A kernel build should not cause any compiler warnings, and this + enables the '-Werror' flag to enforce that rule in the drm subsystem. + + The drm subsystem enables more warnings than the kernel default, so + this config option is disabled by default. + + If in doubt, say N. diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index ea456f057e8a..a73c04d2d7a3 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -30,6 +30,9 @@ subdir-ccflags-y += -Wno-sign-compare endif # --- end copy-paste +# Enable -Werror in CI and development +subdir-ccflags-$(CONFIG_DRM_WERROR) += -Werror + drm-y := \ drm_aperture.o \ drm_atomic.o \