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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A75D0C433EF for ; Tue, 3 May 2022 10:01:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233988AbiECKE5 (ORCPT ); Tue, 3 May 2022 06:04:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50624 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233950AbiECKEo (ORCPT ); Tue, 3 May 2022 06:04:44 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 496A029837 for ; Tue, 3 May 2022 03:01:13 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id F0EFFB81A67 for ; Tue, 3 May 2022 10:01:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5AA8C385B2; Tue, 3 May 2022 10:01:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1651572070; bh=gtCi5UK8fkkNrz2ICXApjgkShDwXqyXoI/epZZ4dS8M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=B9YAV/C1zFgTdoJef/Yq8rIG5SW8UVwR83kS16qY/trXv7o6WYNYeZs2udfYe2XRp 8Wgo/7SHG4NnP58UZD75ueEXKJOrJeu/up/u2JvM6P8lqBaM64BFpPWoX28H56YqE8 rQB4XARxDg5Rb1GBS6zrwtNPP6bAx8BKPn8Hpk7wY4KfgNYr6FCZ8AMztJ58C1am/L tPH4S8viwJMHn7RwqPMkyqKP8r91eVd5JE+Eoz7uYz/G2PqrNrIJjM+tyo5GS4TS/H g6QpJtcAu5YWQL2J+W09A3dlYkRhgpUt6nFNV6Mhz8k1GSCopxGVFCxMctBgx5EDGR rEUWdxKOgOtaQ== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Peter Zijlstra , Phil Auld , Alex Belits , Nicolas Saenz Julienne , Xiongfeng Wang , Neeraj Upadhyay , Thomas Gleixner , Yu Liao , Boqun Feng , "Paul E . McKenney" , Marcelo Tosatti , Paul Gortmaker , Uladzislau Rezki , Joel Fernandes Subject: [PATCH 02/21] rcu: Set rcu_idle_enter() as noinstr Date: Tue, 3 May 2022 12:00:32 +0200 Message-Id: <20220503100051.2799723-3-frederic@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220503100051.2799723-1-frederic@kernel.org> References: <20220503100051.2799723-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This function enters into RCU idle mode, make sure that illegal uses of RCU are spotted there by objtools. Reported-by: Peter Zijlstra Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Neeraj Upadhyay Cc: Uladzislau Rezki Cc: Joel Fernandes Cc: Boqun Feng Cc: Nicolas Saenz Julienne Cc: Marcelo Tosatti Cc: Xiongfeng Wang Cc: Yu Liao Cc: Phil Auld Cc: Paul Gortmaker Cc: Alex Belits Signed-off-by: Frederic Weisbecker --- kernel/rcu/tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 5c587e00811c..a5da4b87afde 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -659,7 +659,7 @@ static noinstr void rcu_eqs_enter(bool user) * If you add or remove a call to rcu_idle_enter(), be sure to test with * CONFIG_RCU_EQS_DEBUG=y. */ -void rcu_idle_enter(void) +noinstr void rcu_idle_enter(void) { lockdep_assert_irqs_disabled(); rcu_eqs_enter(false); -- 2.25.1