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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 E217CC282DE for ; Thu, 13 Mar 2025 20:01:30 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4ZDJKh14npz3cVT; Fri, 14 Mar 2025 07:01:28 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1741866294; cv=none; b=NaFF63FktHJ365L67AgAW2Ft7/Q/xXgp72tTVbxV1cXWLzGn00scVmeNdFX9SMY/vfj0ygw/XXxA3H3iO13PZ6okTsAkKaEmbJXUTOQDaRhCgIYXV7BXpIq5nv0WprP4LbIlaSnet87bQj30Ot4hvB38WfNKTs+ibXNb5tWBOBfLRUQTxEwCMF+GKHDZkemB7KezIePcNQpyXzeMowiWUvbBeRlblMu+2uoSOT9ays9qvCenPi1z90D8DCRgjpx8029Y32N4HnPlb+t0yB0pYj5tPYidM6dc03WrAfkC2eiTvI+erX05fFB8bZ+9/j4GjEODv2NzQ47SOn14Wm7aEg== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1741866294; c=relaxed/relaxed; bh=PbqX7vwCNjEpHKJ2wPiix10XVQC29l2r3Yj9fEcNr2k=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-type; b=cew+SBB0eT3a7ENGVmD2V81EQXyif7odXLEBqIx482E1xDQHHq2vf8v9cwwC3gduM9Rc2ST3UB3Szs5Jym8SOqZOYnLt7stDLU7oxyaNR+cgNNJzwwlYajU93qQnxLjk0B2yglieMSdfr+eZXzgcS5NElvdeEw+9sSvSFn8jcfhgNN1uw9X4jG68ccf0wgBl8FGBZ/jOBaMurRiN+SSCx2C9Kntr78i2UaT6rcF9F8f5KhZE6KJBK8ZcKjiXt1s8QJyXJXJyoJrCpOIvNq1JPK2yacQVPa01Ui5m0rBYjD5e/LfeWrec5xNfC52brYR02pSI4qxUwkf03mjKNok3yw== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=bWZa8nBH; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=bWZa8nBH; dkim-atps=neutral; spf=pass (client-ip=170.10.133.124; helo=us-smtp-delivery-124.mimecast.com; envelope-from=acarmina@redhat.com; receiver=lists.ozlabs.org) smtp.mailfrom=redhat.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=bWZa8nBH; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=bWZa8nBH; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=redhat.com (client-ip=170.10.133.124; helo=us-smtp-delivery-124.mimecast.com; envelope-from=acarmina@redhat.com; receiver=lists.ozlabs.org) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4ZD5Jj6NCsz2ynL for ; Thu, 13 Mar 2025 22:44:53 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741866290; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PbqX7vwCNjEpHKJ2wPiix10XVQC29l2r3Yj9fEcNr2k=; b=bWZa8nBHoXG3GREn2Bx7JrXtcNxzSkst9p0mvZfAAUdEEhYpgyxd0+104qxKLRCjK7EdHp LvHyV4ao/PPHTDZEqaAWFJOVfMRXZpbWTY5fU8OKGcx44tW3N5db537HoF605uQ9p6PZ7Y 7rcbv0SistoNF1StwFbi9en/bsg7fyc= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1741866290; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PbqX7vwCNjEpHKJ2wPiix10XVQC29l2r3Yj9fEcNr2k=; b=bWZa8nBHoXG3GREn2Bx7JrXtcNxzSkst9p0mvZfAAUdEEhYpgyxd0+104qxKLRCjK7EdHp LvHyV4ao/PPHTDZEqaAWFJOVfMRXZpbWTY5fU8OKGcx44tW3N5db537HoF605uQ9p6PZ7Y 7rcbv0SistoNF1StwFbi9en/bsg7fyc= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-84-RW4xBvQRP6-b35M0FypgvQ-1; Thu, 13 Mar 2025 07:44:48 -0400 X-MC-Unique: RW4xBvQRP6-b35M0FypgvQ-1 X-Mimecast-MFC-AGG-ID: RW4xBvQRP6-b35M0FypgvQ_1741866287 Received: by mail-wm1-f72.google.com with SMTP id 5b1f17b1804b1-43d0830c3f7so6438085e9.2 for ; Thu, 13 Mar 2025 04:44:48 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741866287; x=1742471087; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=PbqX7vwCNjEpHKJ2wPiix10XVQC29l2r3Yj9fEcNr2k=; b=lwS1Lc96Qif7Myy4kq0YyyRN+Zj9zBlPdNnrq/AqaBBOSLQ9aR5MBCSuh1fq/83OS9 3j5usRzDVF7EaFMPUW9xOT+1K4vaFMxqsuM+E1c9i3t3Lu9BS4AtiUnXkEPaLLjPe9Q8 ooQ3D8bM7k+QbCruXjUsfROIq3GcnW2nLlwG2SLSGcql7hBK22quk0H+W1BBMgnSMxBj X38UdLtkNU9N/N63Y2maKsrihWEU1YpvRTpC4SZK+v0x6y+QHUdUO48MNQT92o5mSZEK DtJCDBVNXry8s0LnjzNa5E3J/U9uASUVzh6PrHkkveacDCBFCfD1XfaCzMOsWC93Wby4 6bZg== X-Forwarded-Encrypted: i=1; AJvYcCUsSUa+LlavH2sphJ8NFeqH/WJmAwxSdYhlhdOdN8yQt/63VhwJvZK25z/ko5/NrXTdNsI0Vn2seqTDhAU=@lists.ozlabs.org X-Gm-Message-State: AOJu0Yz80I1/TiJTJossGwWUPjx+j3Iv1CDx9wP82Uc2kmQqr8yC33ZR xby2j//Zwo7GBMVe24wsVJs05LrGR75FRkrAI7zD0xAbFFdo8szltaYZhOvmRm9F2afRvUgjIJ1 7xQjG1cb0bfqM2KyxKJCzeOJIT9KNJwALHXyfWeTfM2m1KYWex0RBKshDys9ExYI= X-Gm-Gg: ASbGncus1PPKtiDvVOWxr/37MsoffzlrmMCDQNH5+JBt7o1m04UT3M+Bk/md++me8ij 1BMIqWJttH+PtBiblU7mlYNZEoCZtFx3lKxjJKM1WYk0NlvRnD6/nELzj8ogH/aEtTfWU+0yyb+ +jFx1XICkfXtV6ZmcySXoeFc/mxd0FzEjMOnTF3dfaVc+Z6U9pK1J0N+CDhHNcZ89VF/IkYS3iR niuzk98iV+ctras0ig1y2TTXj3l/ru7c1gkQCSXpbooZD1SG11YAh1loBfqExBbX3yuIs8UhNTJ +ww5CHSPwU8XmgJ9JEwZ X-Received: by 2002:a05:600c:3512:b0:43c:fe15:41c9 with SMTP id 5b1f17b1804b1-43cfe154338mr111255375e9.9.1741866287306; Thu, 13 Mar 2025 04:44:47 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHDgHdaZ1G01z8VuKBQ3BfPMVXgqQ5rvdTXEZ7bpTSjr+Dr16GZrLUPpD2KPNpGCET/hDHX7g== X-Received: by 2002:a05:600c:3512:b0:43c:fe15:41c9 with SMTP id 5b1f17b1804b1-43cfe154338mr111254865e9.9.1741866286869; Thu, 13 Mar 2025 04:44:46 -0700 (PDT) Received: from lab.hqhome163.com ([81.57.75.210]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-43d188b754asm17844115e9.14.2025.03.13.04.44.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Mar 2025 04:44:45 -0700 (PDT) From: Alessandro Carminati 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 , Guenter Roeck , Alessandro Carminati , Jani Nikula , 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, x86@kernel.org, Linux Kernel Functional Testing , Huacai Chen , Alessandro Carminati Subject: [PATCH v4 08/14] loongarch: Add support for suppressing warning backtraces Date: Thu, 13 Mar 2025 11:43:23 +0000 Message-Id: <20250313114329.284104-9-acarmina@redhat.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250313114329.284104-1-acarmina@redhat.com> References: <20250313114329.284104-1-acarmina@redhat.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: skz2bnxvIR37s9kiRY7I7irJSn7-oHmQ-b366o2Py24_1741866287 X-Mimecast-Originator: redhat.com Content-type: text/plain Content-Transfer-Encoding: 8bit From: Guenter Roeck 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: Huacai Chen Signed-off-by: Guenter Roeck Signed-off-by: Alessandro Carminati --- arch/loongarch/include/asm/bug.h | 42 ++++++++++++++++++++++---------- 1 file changed, 29 insertions(+), 13 deletions(-) diff --git a/arch/loongarch/include/asm/bug.h b/arch/loongarch/include/asm/bug.h index f6f254f2c5db..b79ff6696ce6 100644 --- a/arch/loongarch/include/asm/bug.h +++ b/arch/loongarch/include/asm/bug.h @@ -3,49 +3,65 @@ #define __ASM_BUG_H #include +#include #include #include #ifndef CONFIG_DEBUG_BUGVERBOSE -#define _BUGVERBOSE_LOCATION(file, line) +#define _BUGVERBOSE_LOCATION(file, func, line) #else -#define __BUGVERBOSE_LOCATION(file, line) \ +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE +# define HAVE_BUG_FUNCTION +# define __BUG_FUNC_PTR(func) .long func - .; +#else +# define __BUG_FUNC_PTR(func) +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */ + +#define __BUGVERBOSE_LOCATION(file, func, line) \ .pushsection .rodata.str, "aMS", @progbits, 1; \ 10002: .string file; \ .popsection; \ \ .long 10002b - .; \ + __BUG_FUNC_PTR(func) \ .short line; -#define _BUGVERBOSE_LOCATION(file, line) __BUGVERBOSE_LOCATION(file, line) +#define _BUGVERBOSE_LOCATION(file, func, line) __BUGVERBOSE_LOCATION(file, func, line) #endif #ifndef CONFIG_GENERIC_BUG -#define __BUG_ENTRY(flags) +#define __BUG_ENTRY(flags, func) #else -#define __BUG_ENTRY(flags) \ +#define __BUG_ENTRY(flags, func) \ .pushsection __bug_table, "aw"; \ .align 2; \ 10000: .long 10001f - .; \ - _BUGVERBOSE_LOCATION(__FILE__, __LINE__) \ + _BUGVERBOSE_LOCATION(__FILE__, func, __LINE__) \ .short flags; \ .popsection; \ 10001: #endif -#define ASM_BUG_FLAGS(flags) \ - __BUG_ENTRY(flags) \ +#define ASM_BUG_FLAGS(flags, func) \ + __BUG_ENTRY(flags, func) \ break BRK_BUG; -#define ASM_BUG() ASM_BUG_FLAGS(0) +#define ASM_BUG() ASM_BUG_FLAGS(0, .) + +#ifdef HAVE_BUG_FUNCTION +# define __BUG_FUNC __func__ +#else +# define __BUG_FUNC NULL +#endif -#define __BUG_FLAGS(flags, extra) \ - asm_inline volatile (__stringify(ASM_BUG_FLAGS(flags)) \ - extra); +#define __BUG_FLAGS(flags, extra) \ + asm_inline volatile (__stringify(ASM_BUG_FLAGS(flags, %0)) \ + extra : : "i" (__BUG_FUNC) ); #define __WARN_FLAGS(flags) \ do { \ instrumentation_begin(); \ - __BUG_FLAGS(BUGFLAG_WARNING|(flags), ANNOTATE_REACHABLE(10001b));\ + if (!KUNIT_IS_SUPPRESSED_WARNING(__func__)) \ + __BUG_FLAGS(BUGFLAG_WARNING|(flags), ANNOTATE_REACHABLE(10001b));\ instrumentation_end(); \ } while (0) -- 2.34.1