From patchwork Wed Nov 7 01:00:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 994027 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 42qSsg3mTWz9sMM for ; Wed, 7 Nov 2018 12:06:15 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.b="W7j4p7n6"; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 42qSsg27BRzDrqW for ; Wed, 7 Nov 2018 12:06:15 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.b="W7j4p7n6"; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=chromium.org (client-ip=2607:f8b0:4864:20::641; helo=mail-pl1-x641.google.com; envelope-from=dianders@chromium.org; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.b="W7j4p7n6"; dkim-atps=neutral Received: from mail-pl1-x641.google.com (mail-pl1-x641.google.com [IPv6:2607:f8b0:4864:20::641]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 42qSqL0ttrzF2Dy for ; Wed, 7 Nov 2018 12:04:13 +1100 (AEDT) Received: by mail-pl1-x641.google.com with SMTP id p6-v6so7045705pll.4 for ; Tue, 06 Nov 2018 17:04:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=AdAdeS4sZQ8YU1vAJNV5eR8xeGN1ehQuodDt1kCsI6A=; b=W7j4p7n6cVnICxU3fNbrsRLIna/24le2c2DHgzKLMFf5CQnUYOE2mZUtt2Rw7cFgi6 K1v0NjXfenWwuPfGX4TL/6/Henxpcn35IpbF7yXLn6/NLFzfnwdGwXNL7gL4KSJTVfu4 3gwDRe5HZSKr3bULeqf4DdS9aSwrikmCeHVEY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=AdAdeS4sZQ8YU1vAJNV5eR8xeGN1ehQuodDt1kCsI6A=; b=nPRSgP3LhFifETCQ5PDMAvQ4C70dxeORKjZ+O6QjG0KGJ2Z04lQPnzxqHZkO9WDjrx zFZKa22DSzan0sl170KWy1rtyZr81HTdoJ9+9F733sXQLhTHFwk+dHLWEgpPeIVCuaUJ Hn5sEoxrkS4eFFy1zBcPc9javqVAPx4lWbGsJfUJPw7NFzxBKJbKt8igHB712KlwaSux EpUgTVqQIh1LGJP3QL6/Kxpxeac0+l2Y9b8NUdDiVGAOrtRPpFG5VltliEk/5Ehf2OE9 1qxduVX9emSzfzT2kDm4WEDn5iYgzldekxff3Y7artUJe0vdPbDbkwYtO2DEamgMV9+z xcVw== X-Gm-Message-State: AGRZ1gLWRs2+lIhRBntJDHrtEaCiUVlolYdvgXLhmZ113OIHNz3APm3C kOCihLZWybkN1UB4uO8bjRUsFA== X-Google-Smtp-Source: AJdET5fgJULXvtUFPnFq52slokQNN7z81I0D9HZsdKxVHZdxgHrZEi4Cy7djJVVncN5rD1H9qJsdhA== X-Received: by 2002:a17:902:2:: with SMTP id 2-v6mr29324872pla.178.1541552652131; Tue, 06 Nov 2018 17:04:12 -0800 (PST) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:c8e0:70d7:4be7:a36]) by smtp.gmail.com with ESMTPSA id v37sm30134695pgn.5.2018.11.06.17.04.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Nov 2018 17:04:11 -0800 (PST) From: Douglas Anderson To: Jason Wessel , Daniel Thompson Subject: [PATCH v3 0/4] kgdb: Fix kgdb_roundup_cpus() Date: Tue, 6 Nov 2018 17:00:24 -0800 Message-Id: <20181107010028.184543-1-dianders@chromium.org> X-Mailer: git-send-email 2.19.1.930.g4563a0d9d0-goog MIME-Version: 1.0 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mips@linux-mips.org, Michal Hocko , Catalin Marinas , linux-sh@vger.kernel.org, Peter Zijlstra , kgdb-bugreport@lists.sourceforge.net, Will Deacon , linux-kernel@vger.kernel.org, Rich Felker , Paul Mackerras , "H. Peter Anvin" , sparclinux@vger.kernel.org, Yoshinori Sato , linux-hexagon@vger.kernel.org, x86@kernel.org, Russell King , Ingo Molnar , James Hogan , linux-snps-arc@lists.infradead.org, Huang Ying , Mike Rapoport , Borislav Petkov , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Vineet Gupta , Douglas Anderson , Ralf Baechle , Richard Kuo , Paul Burton , Andrew Morton , linuxppc-dev@lists.ozlabs.org, "David S. Miller" Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This series was originally part of the series ("serial: Finish kgdb on qcom_geni; fix many lockdep splats w/ kgdb") but it made sense to split it up. It's believed that dropping into kgdb should be more robust once these patches are applied. Changes in v3: - No separate init call. - Don't round up the CPU that is doing the rounding up. - Add "#ifdef CONFIG_SMP" to match the rest of the file. - Updated desc saying we don't solve the "failed to roundup" case. - Document the ignored parameter. - Patch #3 and #4 are new. Changes in v2: - Removing irq flags separated from fixing lockdep splat. - Removing irq flags separated from fixing lockdep splat. - Don't use smp_call_function (Daniel). Douglas Anderson (4): kgdb: Remove irq flags from roundup kgdb: Fix kgdb_roundup_cpus() for arches who used smp_call_function() kgdb: Don't round up a CPU that failed rounding up before kdb: Don't back trace on a cpu that didn't round up arch/arc/kernel/kgdb.c | 10 ++----- arch/arm/kernel/kgdb.c | 12 --------- arch/arm64/kernel/kgdb.c | 12 --------- arch/hexagon/kernel/kgdb.c | 32 ---------------------- arch/mips/kernel/kgdb.c | 9 +------ arch/powerpc/kernel/kgdb.c | 6 ++--- arch/sh/kernel/kgdb.c | 12 --------- arch/sparc/kernel/smp_64.c | 2 +- arch/x86/kernel/kgdb.c | 9 ++----- include/linux/kgdb.h | 22 +++++++++------ kernel/debug/debug_core.c | 55 +++++++++++++++++++++++++++++++++++++- kernel/debug/debug_core.h | 1 + kernel/debug/kdb/kdb_bt.c | 11 +++++++- 13 files changed, 88 insertions(+), 105 deletions(-)