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=-13.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,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 4084DC4727C for ; Tue, 29 Sep 2020 11:56:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 03732206DB for ; Tue, 29 Sep 2020 11:56:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601380617; bh=0D7uARIEhqAt+0BC7YtnuY3eNgTy+QSF5MECcVALQUI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ivinGON2YgtKOqTWj+MSf4nekf7fInBqUGaGE75tfjFcnvpzPd9HyRmUWoU2uIqTD Ii8N2cDLhAP8qrEITJrf4UIxB7KVEYl2N6X7XmWpNQC5ieiOz4WVTRP7nG6/DEueRk aYnGCoLTOOzHvzye9KoFn6PMGSwop65txjE5FH6w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731153AbgI2L4z (ORCPT ); Tue, 29 Sep 2020 07:56:55 -0400 Received: from mail.kernel.org ([198.145.29.99]:42156 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730800AbgI2Lnl (ORCPT ); Tue, 29 Sep 2020 07:43:41 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id ED34C2076A; Tue, 29 Sep 2020 11:43:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601379814; bh=0D7uARIEhqAt+0BC7YtnuY3eNgTy+QSF5MECcVALQUI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RmgZr2OOG2Z10nWiNBTtaag1FDYDQvecFarvavnQdDET9jvvXgYuXxxCrLqwTuiHQ ydgCKxaZKd1JosTNn/4h3fPblnxPN6mP7zcjiOTJtZSe3XfIJWwUi187ehOEpseXaX XKydAF5ITzbOH2ARdlw8kWH+rZR99+vW2ul4gpuM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Peter Zijlstra , Sven Schnelle , Vasily Gorbik , Sasha Levin Subject: [PATCH 5.4 330/388] lockdep: fix order in trace_hardirqs_off_caller() Date: Tue, 29 Sep 2020 13:01:01 +0200 Message-Id: <20200929110026.433752204@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200929110010.467764689@linuxfoundation.org> References: <20200929110010.467764689@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sven Schnelle [ Upstream commit 73ac74c7d489756d2313219a108809921dbfaea1 ] Switch order so that locking state is consistent even if the IRQ tracer calls into lockdep again. Acked-by: Peter Zijlstra Signed-off-by: Sven Schnelle Signed-off-by: Vasily Gorbik Signed-off-by: Sasha Levin --- kernel/trace/trace_preemptirq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c index 4d8e99fdbbbee..26b06b09c9f68 100644 --- a/kernel/trace/trace_preemptirq.c +++ b/kernel/trace/trace_preemptirq.c @@ -63,14 +63,14 @@ NOKPROBE_SYMBOL(trace_hardirqs_on_caller); __visible void trace_hardirqs_off_caller(unsigned long caller_addr) { + lockdep_hardirqs_off(CALLER_ADDR0); + if (!this_cpu_read(tracing_irq_cpu)) { this_cpu_write(tracing_irq_cpu, 1); tracer_hardirqs_off(CALLER_ADDR0, caller_addr); if (!in_nmi()) trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr); } - - lockdep_hardirqs_off(CALLER_ADDR0); } EXPORT_SYMBOL(trace_hardirqs_off_caller); NOKPROBE_SYMBOL(trace_hardirqs_off_caller); -- 2.25.1