From mboxrd@z Thu Jan 1 00:00:00 1970 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 3ED51CD128A for ; Wed, 3 Apr 2024 13:20:04 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F20B2112AF7; Wed, 3 Apr 2024 13:20:02 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="Z8xB1rQ/"; dkim-atps=neutral Received: from mail-pl1-f182.google.com (mail-pl1-f182.google.com [209.85.214.182]) by gabe.freedesktop.org (Postfix) with ESMTPS id B85DF112AF3 for ; Wed, 3 Apr 2024 13:20:01 +0000 (UTC) Received: by mail-pl1-f182.google.com with SMTP id d9443c01a7336-1e0411c0a52so54171605ad.0 for ; Wed, 03 Apr 2024 06:20:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1712150401; x=1712755201; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=klYg8xMT6MjrhYgIxkpLnDg0Lyaa6cQfR4UsA0LeN2U=; b=Z8xB1rQ/qHsWg1azgWHgE1GEryVZ1Uq13Fbt3zo0LJLjq63Wp/uqrnKqR8KGyAce1A UfgreA7svpBa+ynwX57RPF4j6ZraTfppW9H8s0xxjTmwYAPsMp88twE8kLjiPZ3+wGSl ua8ILn/McVXRNiXd6bN9rMbswn8ddQKYMoik8pf5em4yd1PLg19et9jj6KNZm80Ir2bG s9Sbs6JE5dE/XWuZ3uKJ0dmSObss48gthav4qOIc5RiFPA2x1rx7RiR9PVrSjd6p4/pm vs/iHDiddITNwxSRtbqbm8vsHdRtvHdnB6G6I2NRKb65GwT9YvNC38HuEFP8DRWyGFVU Opvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712150401; x=1712755201; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=klYg8xMT6MjrhYgIxkpLnDg0Lyaa6cQfR4UsA0LeN2U=; b=ZVwZACAXejUXDuOENpg3+Pnt9de+7lVFvvp21GFNNGR5LCozv5OAQRjbl+0VaYBPpk 2O4wX54l5iyXxXEXxFMRxadvPqAoQqnzo3gbGQtS7tEEEb4bpjHL/SOL7o3T4Sacz4xz piL3hPOWRR8jmZAdEO9JhWNizeDiUGojWUsyBVCvTFrZeyOx720nSm9ep8RMUtg9oboB gpO+fvZQ//Hxq3miykk7ZETv5H8nkbsI/QTA1zslWYiMCpX0CEVrej7nZ6cD7Gr/kesz M59aOqTeN70sOJWRGpZeiP63wNfR5XLbzAfFbfzkJUQVjCV6Ynmq2FzC6Tf4CAkcgIl8 hmzA== X-Forwarded-Encrypted: i=1; AJvYcCUYptsRGtKsERvaKDiqNocPMiBy3Gi/sJ9WNRDYu9l2FLMJPDc6X5gUlPUp7WrbWgGTGquhBw9221BE46ltKa2qBh2q09uMNrWiPZnKLcbg X-Gm-Message-State: AOJu0Yzm8wXf85l6iq3RbAneFr++x047pzFXm1ugPPMJl9+BlMugcvmU O9noZ/bCSTgK5ZuRXZCzGy+F4ViEYloNRZO43d7lgtx0E+wfMQdX X-Google-Smtp-Source: AGHT+IEMqe589WW9yt5k/lfzrxxoDYVpXeSOxtyZyHF9LDTCjhOnJNt1j89G1vs1iICWdJ7uWy226Q== X-Received: by 2002:a17:902:bb16:b0:1e0:b871:53f1 with SMTP id im22-20020a170902bb1600b001e0b87153f1mr12301982plb.31.1712150401114; Wed, 03 Apr 2024 06:20:01 -0700 (PDT) Received: from server.roeck-us.net ([2600:1700:e321:62f0:329c:23ff:fee3:9d7c]) by smtp.gmail.com with ESMTPSA id x3-20020a170902a38300b001e2461c52c6sm9309915pla.149.2024.04.03.06.20.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 06:20:00 -0700 (PDT) From: Guenter Roeck To: linux-kselftest@vger.kernel.org Cc: David Airlie , Arnd Bergmann , =?UTF-8?q?Ma=C3=ADra=20Canal?= , Dan Carpenter , Kees Cook , Daniel Diaz , David Gow , Arthur Grillo , Brendan Higgins , Naresh Kamboju , Maarten Lankhorst , Andrew Morton , Maxime Ripard , =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , Daniel Vetter , Thomas Zimmermann , dri-devel@lists.freedesktop.org, kunit-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, x86@kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Heiko Carstens , Vasily Gorbik , Alexander Gordeev Subject: [PATCH v3 11/15] s390: Add support for suppressing warning backtraces Date: Wed, 3 Apr 2024 06:19:32 -0700 Message-Id: <20240403131936.787234-12-linux@roeck-us.net> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240403131936.787234-1-linux@roeck-us.net> References: <20240403131936.787234-1-linux@roeck-us.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add name of functions triggering warning backtraces to the __bug_table object section to enable support for suppressing WARNING backtraces. To limit image size impact, the pointer to the function name is only added to the __bug_table section if both CONFIG_KUNIT_SUPPRESS_BACKTRACE and CONFIG_DEBUG_BUGVERBOSE are enabled. Otherwise, the __func__ assembly parameter is replaced with a (dummy) NULL parameter to avoid an image size increase due to unused __func__ entries (this is necessary because __func__ is not a define but a virtual variable). Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Alexander Gordeev Signed-off-by: Guenter Roeck --- v2: - Rebased to v6.9-rc1 (simplified assembler changes after upstream commit 3938490e78f4 ("s390/bug: remove entry size from __bug_table section") - Added Tested-by:, Acked-by:, and Reviewed-by: tags - Introduced KUNIT_SUPPRESS_BACKTRACE configuration option v3: - Rebased to v6.9-rc2 arch/s390/include/asm/bug.h | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-) diff --git a/arch/s390/include/asm/bug.h b/arch/s390/include/asm/bug.h index c500d45fb465..44d4e9f24ae0 100644 --- a/arch/s390/include/asm/bug.h +++ b/arch/s390/include/asm/bug.h @@ -8,6 +8,15 @@ #ifdef CONFIG_DEBUG_BUGVERBOSE +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR " .long %0-.\n" +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC_PTR +# define __BUG_FUNC NULL +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + #define __EMIT_BUG(x) do { \ asm_inline volatile( \ "0: mc 0,0\n" \ @@ -17,10 +26,12 @@ ".section __bug_table,\"aw\"\n" \ "2: .long 0b-.\n" \ " .long 1b-.\n" \ - " .short %0,%1\n" \ - " .org 2b+%2\n" \ + __BUG_FUNC_PTR \ + " .short %1,%2\n" \ + " .org 2b+%3\n" \ ".previous\n" \ - : : "i" (__LINE__), \ + : : "i" (__BUG_FUNC), \ + "i" (__LINE__), \ "i" (x), \ "i" (sizeof(struct bug_entry))); \ } while (0) -- 2.39.2