From nobody Mon Apr 6 07:34:45 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0344DC433EF for ; Tue, 29 Mar 2022 16:40:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239728AbiC2Qlq (ORCPT ); Tue, 29 Mar 2022 12:41:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55470 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239713AbiC2Qlk (ORCPT ); Tue, 29 Mar 2022 12:41:40 -0400 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A4BE7D3AD2 for ; Tue, 29 Mar 2022 09:39:53 -0700 (PDT) Received: by mail-pf1-x434.google.com with SMTP id u22so16370849pfg.6 for ; Tue, 29 Mar 2022 09:39:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=P1ZWeHzJnJATMrQxuRDR3Jq6LHpaaLa4xZY7ozAuw8U=; b=kSkXfnnRRg5oFbaP7RN9L1XFHs2Sz/aWI0DBYfHoFqsV1utVvyfaL46AQPZLzpec1n FUQBezhhSO5O2ED/ZXYoiDdg4Ud6gK0Al8ZJZG4LPhV2W4mcfmx0Nro8e61W8AjQzKff P7TwDTJLCmVbu7xriviKFBa0iIS808Njr8uBuLoJRI0xNi9sjT0ozXAp8krrLAfxyzZw /I8ykbVYwHFWf8u2iaKPnfPew2fAlghM6GS2Oq/ez1n2XXEn7Sh2E9MVyp39f7qut5xD tXVHlE6O9/NfHC9cdXjsIkgPaYRCSj33IdJScQmkWuZGW1ADa8ElW1viopEDGGkw/Gcf /bTg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=P1ZWeHzJnJATMrQxuRDR3Jq6LHpaaLa4xZY7ozAuw8U=; b=wdEs49Wh1cqkxXAGwcjVxZfdprtP8fq6pd8VWEWzP0JJiZh1hLaSUPDNFg+iuUq7Od LvW+u1X335dq+yoiE1Yrp3Yxp+Ped4YlOT+yRQhh4D66NCWo/u1rAyBt537E+kdPFhIk KFCkRhFDU3AW6W6tQASDY09oeQRHgv6QmgpYH2XLkhYN4VDk8E7A1DEHDqjNSSUurPGN gn+YIbFYMCLTKSM28JJ9wkMBAmYEjIBKq/owT1YnaTTFYnb4EtIC1TTkCBmgBDohReKa Ws9lHErL2h9ULRY4cETjP+84t1bP8fKbxE0yNUKnec57THw/wfMOlCLtMH450ZzZvjIw +Z3g== X-Gm-Message-State: AOAM531PKgeTyUpj3tJYoa+Q2jbiiu16Na2WWEMjtLRW0jw42rvAHewI y3jV8rMCl60qs6X2pC1WvGZfMHjUoh0= X-Google-Smtp-Source: ABdhPJxgPG8ZULgHaXmLYMZIxDi6H3LNsd06CyRRjKkfsEvZI6FOkx6fCztbKC0rW2FINrHd0JS/xQ== X-Received: by 2002:a65:43c8:0:b0:378:7add:ec4c with SMTP id n8-20020a6543c8000000b003787addec4cmr2559099pgp.570.1648571993064; Tue, 29 Mar 2022 09:39:53 -0700 (PDT) Received: from localhost.localdomain (li567-56.members.linode.com. [192.155.81.56]) by smtp.gmail.com with ESMTPSA id q7-20020a17090a178700b001c97d3614e5sm3382093pja.33.2022.03.29.09.39.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Mar 2022 09:39:52 -0700 (PDT) From: Jeff Xie To: rostedt@goodmis.org Cc: mingo@redhat.com, mhiramat@kernel.org, zanussi@kernel.org, linux-kernel@vger.kernel.org, Jeff Xie Subject: [PATCH 1/3] tracing: make tracepoint_iter_lock public Date: Wed, 30 Mar 2022 00:39:29 +0800 Message-Id: <20220329163931.710555-2-xiehuan09@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220329163931.710555-1-xiehuan09@gmail.com> References: <20220329163931.710555-1-xiehuan09@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The syscall tracepoints need tracepoint_iter_lock for the tp_printk work. Signed-off-by: Jeff Xie --- kernel/trace/trace.c | 2 +- kernel/trace/trace.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index eaf7d30ca6f1..867f00473f9f 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2833,7 +2833,7 @@ trace_event_buffer_lock_reserve(struct trace_buffer *= *current_rb, } EXPORT_SYMBOL_GPL(trace_event_buffer_lock_reserve); =20 -static DEFINE_SPINLOCK(tracepoint_iter_lock); +DEFINE_SPINLOCK(tracepoint_iter_lock); static DEFINE_MUTEX(tracepoint_printk_mutex); =20 static void output_printk(struct trace_event_buffer *fbuffer) diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 0f5e22238cd2..7ce345699ac2 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1523,6 +1523,7 @@ static inline void *event_file_data(struct file *filp) =20 extern struct mutex event_mutex; extern struct list_head ftrace_events; +extern spinlock_t tracepoint_iter_lock; =20 extern const struct file_operations event_trigger_fops; extern const struct file_operations event_hist_fops; --=20 2.25.1