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 9E979CDB479 for ; Thu, 25 Jun 2026 15:26:17 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4gmN1g12Xmz2yVd; Fri, 26 Jun 2026 01:26:15 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2a11:7980:1::2:0" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1782401174; cv=none; b=hiP5/VxW4v5UYcp4LyzKgT6S4mEU7mvLBzZkxOR/Qjt/Cwe1iQL+3O3geAIQe2F5CiSLjtbTT2IXUmlKFI5zO8AG8UZQ5JAI1XEorpZHAXlOINsB8wu23NPmEBwNxVWN3A2LlhfnCOBJ3IDIHuCgtXq6h1UjdEyKmL2pqXx8R9C5R44ajZgek1NmHxqjkNThUR0WQc4zAVzgyhmRmxnLsHhhc58LJwF8tkQAzLfjmX1QYXmV+y5nTX+LDGClHTyjaiY0YoQFtrveuMES4kST1VgZC0+IwB7nsh0YvSIGnMo/iXul4lFlPTj1pj4bpicTaTX6iZctoqov49YKUPdjzQ== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1782401174; c=relaxed/relaxed; bh=5CnqIZrXbOvj5YTogFA5mNwwB12cmB+wEc2uMYZ9VoI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=hYDdU22zDVoP70B+CI1F1+0ASZvzYV9r+d0q1ZQy7fw0JQ8wGZSU4X90IpmJFOdVD5AOAWspsWq4G3HG64oEMsKFgBkTlH2bWGVRo6BIth/iTTxoBKlhviXGwDHDnfaMAFU3r/37s4rjZXDbz95+ll8XFboGUseQi5ZQc5baeaSyt24ldvEf0vqOksxv6i3isbTMwauGIBL475sGobCWqtwJ2hi/CYpT7Pwe4L93ddaCcLOb9EwmljSPG3wSzsmRHn/B0bJFrZba3n0bYUr3WcV+2XzwDGtO8DPjpFAT0wXB9BKbPlOUzSxFwBllI2vUhjYrcrwJ8rT9BEIadCUKzw== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=reject dis=none) header.from=grrlz.net; dkim=pass (1024-bit key; secure) header.d=grrlz.net header.i=@grrlz.net header.a=rsa-sha256 header.s=stigmate header.b=e07tngQX; dkim-atps=neutral; spf=pass (client-ip=2a11:7980:1::2:0; helo=confino.investici.org; envelope-from=include@grrlz.net; receiver=lists.ozlabs.org) smtp.mailfrom=grrlz.net Authentication-Results: lists.ozlabs.org; dmarc=pass (p=reject dis=none) header.from=grrlz.net Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; secure) header.d=grrlz.net header.i=@grrlz.net header.a=rsa-sha256 header.s=stigmate header.b=e07tngQX; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=grrlz.net (client-ip=2a11:7980:1::2:0; helo=confino.investici.org; envelope-from=include@grrlz.net; receiver=lists.ozlabs.org) Received: from confino.investici.org (confino.investici.org [IPv6:2a11:7980:1::2:0]) (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 4gmN1d3zymz2xM7 for ; Fri, 26 Jun 2026 01:26:13 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=grrlz.net; s=stigmate; t=1782401169; bh=5CnqIZrXbOvj5YTogFA5mNwwB12cmB+wEc2uMYZ9VoI=; h=From:To:Cc:Subject:Date:From; b=e07tngQXAOEZscw7ItyoLzxMsp7Ue3bldidYfHVIzLCq6lk4TxQcueMgQ9+yxl3dz 3xNtlINvBBG2n81B7hmWnqomB805PfqiomxKlInI5v4VW66KJAMOqJW6Q3z4tMAQH6 yD4iwzTxJJ6gJBE8x4H+AFLjVPljCZbA1sYBgB6s= Received: from mx1.investici.org (unknown [127.0.0.1]) by confino.investici.org (Postfix) with ESMTP id 4gmN1Y5KFRz10hn; Thu, 25 Jun 2026 15:26:09 +0000 (UTC) Received: by mx1.investici.org (Postfix) id 4gmN1Y0NDvz10j8; Thu, 25 Jun 2026 15:26:09 +0000 (UTC) From: Bradley Morgan To: Andrew Morton Cc: Petr Mladek , Feng Tang , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Madhavan Srinivasan , Douglas Anderson , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, stable@vger.kernel.org, Bradley Morgan Subject: [PATCH v3 0/4] sys_info: prevent duplicate backtraces Date: Thu, 25 Jun 2026 15:25:54 +0000 Message-ID: <20260625152558.7450-1-include@grrlz.net> X-Mailer: git-send-email 2.53.0 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Some callers handle SYS_INFO_ALL_BT themselves before calling sys_info(). When they strip that bit, an all_bt-only mask becomes zero and sys_info(0) falls back to kernel_si_mask, potentially duplicating output. This series adds sys_info_with_filter() to filter specific bits without triggering the kernel_si_mask fallback. Changes since v2: - Use sys_info_with_filter() instead of sys_info_without_all_bt() per Petr's suggestion - Filter applied at __sys_info() level to handle kernel_si_mask correctly - Added panic.c conversion Bradley Morgan (4): sys_info: add helper for callers that print some sys_info on their own watchdog: use sys_info_with_filter() to avoid duplicate backtraces powerpc/watchdog: use sys_info_with_filter() to avoid duplicate backtraces panic: use sys_info_with_filter() to avoid duplicate backtraces arch/powerpc/kernel/watchdog.c | 12 ++++++++---- include/linux/sys_info.h | 1 + kernel/panic.c | 2 +- kernel/watchdog.c | 12 ++++++++---- lib/sys_info.c | 20 ++++++++++++++++++-- 5 files changed, 36 insertions(+), 11 deletions(-) -- 2.53.0