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 X-Spam-Level: X-Spam-Status: No, score=-2.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 972C9C43141 for ; Thu, 28 Jun 2018 18:22:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5576924A22 for ; Thu, 28 Jun 2018 18:22:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=joelfernandes.org header.i=@joelfernandes.org header.b="UYBeuadd" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5576924A22 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=joelfernandes.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030467AbeF1SWF (ORCPT ); Thu, 28 Jun 2018 14:22:05 -0400 Received: from mail-pg0-f68.google.com ([74.125.83.68]:43250 "EHLO mail-pg0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030424AbeF1SV6 (ORCPT ); Thu, 28 Jun 2018 14:21:58 -0400 Received: by mail-pg0-f68.google.com with SMTP id a14-v6so2822106pgw.10 for ; Thu, 28 Jun 2018 11:21:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=joelfernandes.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=0y0Y6HhK02jQ+sXqM8QUkLbOeY++kM/KqedsahzGKIA=; b=UYBeuaddyHOkDRXB3clMsI+fP0kxjCx1sKemDpV4VuA+IFBBZeTd8a39mcrnsa+MFF XO3KcZO86q9uF0FH6KQaP0IeUaUqPEVM6EVCVSahfByi58RP5jhUa0acRkWZCAdP4ikW 2Zh9c9ige893C0NYWLV93UjHdGS6tL2TcAniY= 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:in-reply-to :references; bh=0y0Y6HhK02jQ+sXqM8QUkLbOeY++kM/KqedsahzGKIA=; b=d5MjQ2ZeEyRNnUrdo5bnEDJATbPTBtyDcUL/2uHzc+IqhPHb/i8wJiNFWQvoBhQKqg CyYtyntJ70U17A+Ihk7keAAHP/+SdSM+b4EcUZnuMMwzOavy2vzk9PkgUmvdfQLavOTc xBO0WdN3TxAyyIAD8dKCqtEQM51E2J8kmqWoWD7OvivpMpMi03MmvQWFdx1WpD+GB+al C0cFyvzqTriXz9Xqf+osPF0gwbEQ3sS3kTI8ZxZbpGJLhl4aA9i6HQmX6HS08Pzz50ZH sjj2G+SgsTQWbKUtacT2v9cFgerzDufdVHoqBwaeYe4bTXvJg+W6kzwoyX2l3EaMoe0H m4dA== X-Gm-Message-State: APt69E2LmA4aDbhwuCgpKQxG+KyL+ZeM4XdRLlS5nxKMR4kWnVvNyCTb ywaVXesWtWHAtsu2Km9Jq9SG2UUvqrU= X-Google-Smtp-Source: ADUXVKImXd1pmagiPhv2WH6F2+oMeVadbleJN1koIaJGcCeT0g+OfNCPH1cXggsrVttDvSHamL+Zdg== X-Received: by 2002:a63:2f04:: with SMTP id v4-v6mr9540770pgv.33.1530210117657; Thu, 28 Jun 2018 11:21:57 -0700 (PDT) Received: from joelaf.mtv.corp.google.com ([2620:0:1000:1600:3122:ea9c:d178:eb]) by smtp.gmail.com with ESMTPSA id q10-v6sm13686027pfj.7.2018.06.28.11.21.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 28 Jun 2018 11:21:57 -0700 (PDT) From: Joel Fernandes To: linux-kernel@vger.kernel.org Cc: Paul McKenney , Joel Fernandes , Boqun Feng , Byungchul Park , Ingo Molnar , Julia Cartwright , linux-kselftest@vger.kernel.org, Masami Hiramatsu , Mathieu Desnoyers , Namhyung Kim , Peter Zijlstra , Steven Rostedt , Thomas Glexiner , Tom Zanussi Subject: [PATCH v9 1/7] srcu: Add notrace variants of srcu_read_{lock,unlock} Date: Thu, 28 Jun 2018 11:21:43 -0700 Message-Id: <20180628182149.226164-2-joel@joelfernandes.org> X-Mailer: git-send-email 2.18.0.rc2.346.g013aa6912e-goog In-Reply-To: <20180628182149.226164-1-joel@joelfernandes.org> References: <20180628182149.226164-1-joel@joelfernandes.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Paul McKenney This is needed for a future tracepoint patch that uses srcu, and to make sure it doesn't call into lockdep. tracepoint code already calls notrace variants for rcu_read_lock_sched so this patch does the same for srcu which will be used in a later patch. Keeps it consistent with rcu-sched. [Joel: Added commit message] Reviewed-by: Steven Rostedt (VMware) Signed-off-by: Paul McKenney Signed-off-by: Joel Fernandes (Google) --- include/linux/srcu.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/linux/srcu.h b/include/linux/srcu.h index 91494d7e8e41..3e72a291c401 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -195,6 +195,16 @@ static inline int srcu_read_lock(struct srcu_struct *sp) __acquires(sp) return retval; } +/* Used by tracing, cannot be traced and cannot invoke lockdep. */ +static inline notrace int +srcu_read_lock_notrace(struct srcu_struct *sp) __acquires(sp) +{ + int retval; + + retval = __srcu_read_lock(sp); + return retval; +} + /** * srcu_read_unlock - unregister a old reader from an SRCU-protected structure. * @sp: srcu_struct in which to unregister the old reader. @@ -209,6 +219,13 @@ static inline void srcu_read_unlock(struct srcu_struct *sp, int idx) __srcu_read_unlock(sp, idx); } +/* Used by tracing, cannot be traced and cannot call lockdep. */ +static inline notrace void +srcu_read_unlock_notrace(struct srcu_struct *sp, int idx) __releases(sp) +{ + __srcu_read_unlock(sp, idx); +} + /** * smp_mb__after_srcu_read_unlock - ensure full ordering after srcu_read_unlock * -- 2.18.0.rc2.346.g013aa6912e-goog From mboxrd@z Thu Jan 1 00:00:00 1970 From: joel at joelfernandes.org (Joel Fernandes) Date: Thu, 28 Jun 2018 11:21:43 -0700 Subject: [PATCH v9 1/7] srcu: Add notrace variants of srcu_read_{lock,unlock} In-Reply-To: <20180628182149.226164-1-joel@joelfernandes.org> References: <20180628182149.226164-1-joel@joelfernandes.org> Message-ID: <20180628182149.226164-2-joel@joelfernandes.org> From: Paul McKenney This is needed for a future tracepoint patch that uses srcu, and to make sure it doesn't call into lockdep. tracepoint code already calls notrace variants for rcu_read_lock_sched so this patch does the same for srcu which will be used in a later patch. Keeps it consistent with rcu-sched. [Joel: Added commit message] Reviewed-by: Steven Rostedt (VMware) Signed-off-by: Paul McKenney Signed-off-by: Joel Fernandes (Google) --- include/linux/srcu.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/linux/srcu.h b/include/linux/srcu.h index 91494d7e8e41..3e72a291c401 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -195,6 +195,16 @@ static inline int srcu_read_lock(struct srcu_struct *sp) __acquires(sp) return retval; } +/* Used by tracing, cannot be traced and cannot invoke lockdep. */ +static inline notrace int +srcu_read_lock_notrace(struct srcu_struct *sp) __acquires(sp) +{ + int retval; + + retval = __srcu_read_lock(sp); + return retval; +} + /** * srcu_read_unlock - unregister a old reader from an SRCU-protected structure. * @sp: srcu_struct in which to unregister the old reader. @@ -209,6 +219,13 @@ static inline void srcu_read_unlock(struct srcu_struct *sp, int idx) __srcu_read_unlock(sp, idx); } +/* Used by tracing, cannot be traced and cannot call lockdep. */ +static inline notrace void +srcu_read_unlock_notrace(struct srcu_struct *sp, int idx) __releases(sp) +{ + __srcu_read_unlock(sp, idx); +} + /** * smp_mb__after_srcu_read_unlock - ensure full ordering after srcu_read_unlock * -- 2.18.0.rc2.346.g013aa6912e-goog -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 From: joel@joelfernandes.org (Joel Fernandes) Date: Thu, 28 Jun 2018 11:21:43 -0700 Subject: [PATCH v9 1/7] srcu: Add notrace variants of srcu_read_{lock,unlock} In-Reply-To: <20180628182149.226164-1-joel@joelfernandes.org> References: <20180628182149.226164-1-joel@joelfernandes.org> Message-ID: <20180628182149.226164-2-joel@joelfernandes.org> Content-Type: text/plain; charset="UTF-8" Message-ID: <20180628182143.vQUxX2MyKI1htk_Ue9ceq0HtHcVgbpKOosfoqKau-0g@z> From: Paul McKenney This is needed for a future tracepoint patch that uses srcu, and to make sure it doesn't call into lockdep. tracepoint code already calls notrace variants for rcu_read_lock_sched so this patch does the same for srcu which will be used in a later patch. Keeps it consistent with rcu-sched. [Joel: Added commit message] Reviewed-by: Steven Rostedt (VMware) Signed-off-by: Paul McKenney Signed-off-by: Joel Fernandes (Google) --- include/linux/srcu.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/include/linux/srcu.h b/include/linux/srcu.h index 91494d7e8e41..3e72a291c401 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -195,6 +195,16 @@ static inline int srcu_read_lock(struct srcu_struct *sp) __acquires(sp) return retval; } +/* Used by tracing, cannot be traced and cannot invoke lockdep. */ +static inline notrace int +srcu_read_lock_notrace(struct srcu_struct *sp) __acquires(sp) +{ + int retval; + + retval = __srcu_read_lock(sp); + return retval; +} + /** * srcu_read_unlock - unregister a old reader from an SRCU-protected structure. * @sp: srcu_struct in which to unregister the old reader. @@ -209,6 +219,13 @@ static inline void srcu_read_unlock(struct srcu_struct *sp, int idx) __srcu_read_unlock(sp, idx); } +/* Used by tracing, cannot be traced and cannot call lockdep. */ +static inline notrace void +srcu_read_unlock_notrace(struct srcu_struct *sp, int idx) __releases(sp) +{ + __srcu_read_unlock(sp, idx); +} + /** * smp_mb__after_srcu_read_unlock - ensure full ordering after srcu_read_unlock * -- 2.18.0.rc2.346.g013aa6912e-goog -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html