From patchwork Thu May 23 05:34:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Liu X-Patchwork-Id: 1103830 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: incoming-bpf@patchwork.ozlabs.org Delivered-To: patchwork-incoming-bpf@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=bpf-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=fb.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=fb.com header.i=@fb.com header.b="Vw6rlYbl"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 458dVN2hfYz9sBK for ; Thu, 23 May 2019 15:34:36 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726070AbfEWFef (ORCPT ); Thu, 23 May 2019 01:34:35 -0400 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:56248 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725786AbfEWFef (ORCPT ); Thu, 23 May 2019 01:34:35 -0400 Received: from pps.filterd (m0044008.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x4N5T0Hm015623 for ; Wed, 22 May 2019 22:34:34 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=facebook; bh=a0uF7x09L2/WjWeppBCueqrZ16Oc1jezGkJgcOEFv98=; b=Vw6rlYblhLg7w2L4eqUFjvG9YJrMiFg9xSflmW2R1zbMvq75wAQeKilI5+1qaKNOqkWg I3kPpUshbsKzVHBBCrwhbBlzEJON7z/qYtO+IAIAnVFMcYq7iGTjZMFzapPItYaD++xB iAIRyw0W6AvPSwjjoiF69rjXnAfURCA+niA= Received: from mail.thefacebook.com (mailout.thefacebook.com [199.201.64.23]) by mx0a-00082601.pphosted.com with ESMTP id 2sn8b0trbw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT) for ; Wed, 22 May 2019 22:34:34 -0700 Received: from mx-out.facebook.com (2620:10d:c081:10::13) by mail.thefacebook.com (2620:10d:c081:35::127) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA) id 15.1.1713.5; Wed, 22 May 2019 22:34:33 -0700 Received: by devbig006.ftw2.facebook.com (Postfix, from userid 4523) id 69A9F62E2CA2; Wed, 22 May 2019 22:34:31 -0700 (PDT) Smtp-Origin-Hostprefix: devbig From: Song Liu Smtp-Origin-Hostname: devbig006.ftw2.facebook.com To: , CC: , Song Liu , Kairui Song , Peter Zijlstra Smtp-Origin-Cluster: ftw2c04 Subject: [PATCH v2] perf/x86: always include regs->ip in callchain Date: Wed, 22 May 2019 22:34:29 -0700 Message-ID: <20190523053429.3567376-1-songliubraving@fb.com> X-Mailer: git-send-email 2.17.1 X-FB-Internal: Safe MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-05-23_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=760 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1905230039 X-FB-Internal: deliver Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Commit d15d356887e7 removes regs->ip for !perf_hw_regs(regs) case. This patch adds regs->ip back. Fixes: d15d356887e7 ("perf/x86: Make perf callchains work without CONFIG_FRAME_POINTER") Cc: Kairui Song Cc: Peter Zijlstra (Intel) Signed-off-by: Song Liu --- arch/x86/events/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index f315425d8468..7b8a9eb4d5fd 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -2402,9 +2402,9 @@ perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *re return; } + if (perf_callchain_store(entry, regs->ip)) + return; if (perf_hw_regs(regs)) { - if (perf_callchain_store(entry, regs->ip)) - return; unwind_start(&state, current, regs, NULL); } else { unwind_start(&state, current, NULL, (void *)regs->sp);