From patchwork Thu Apr 6 14:45:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Ellerman X-Patchwork-Id: 13203586 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 3C84CC77B6F for ; Thu, 6 Apr 2023 14:47:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238530AbjDFOrv (ORCPT ); Thu, 6 Apr 2023 10:47:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52698 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238145AbjDFOrd (ORCPT ); Thu, 6 Apr 2023 10:47:33 -0400 Received: from gandalf.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BB3CB9748 for ; Thu, 6 Apr 2023 07:45:57 -0700 (PDT) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4Psknr5wJ0z4xFf; Fri, 7 Apr 2023 00:45:52 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ellerman.id.au; s=201909; t=1680792352; bh=qodY2Q6CbcE/PBC3R4o7HdbOAge0infBVNAA92K2ITM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kaqSS7OIeEjpjtZkELzMk9V5UHap9SFDVhQEU8UA/HqCTcI7sas9JLN8XNzH/LJOm iziSdk9lq8QXDYKBnbxOKVLBgZwI/8bXMT6THnPtst17zYR8sBjkaEZ9hEoYsTZ4c2 IJdFCX686rb1UHn06jWbPbZhOIgAAiEpoOtnhUuD2M/inJn2SXkDkfudQC0UnbsOez RnK5r1DKlo1QAqkt2GmF4tSDT43o3TEZHkD+QRSIpcLvd4hR0JdM6SpDVI4FL1uJwN lKY8t6Q+20u7CrZlm+0RXkn/BselT3D+fumGMIRaaFB/EmKnUQvD0uAKUFdXN8r2xd tT4lpP6G/ygfQ== From: Michael Ellerman To: Cc: , , linux-pm@vger.kernel.org Subject: [PATCH 2/4] powerpc/64: Don't call trace_hardirqs_on() in prep_irq_for_idle() Date: Fri, 7 Apr 2023 00:45:33 +1000 Message-Id: <20230406144535.3786008-2-mpe@ellerman.id.au> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230406144535.3786008-1-mpe@ellerman.id.au> References: <20230406144535.3786008-1-mpe@ellerman.id.au> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Since commit a01353cf1896 ("cpuidle: Fix ct_idle_*() usage"), the cpuidle entry code calls trace_hardirqs_on() (actually trace_hardirqs_on_prepare()) in ct_cpuidle_enter() before calling into the cpuidle driver. Suggested-by: Peter Zijlstra Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/irq_64.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/kernel/irq_64.c b/arch/powerpc/kernel/irq_64.c index 2ab0e8d84c1d..938e66829eae 100644 --- a/arch/powerpc/kernel/irq_64.c +++ b/arch/powerpc/kernel/irq_64.c @@ -348,9 +348,8 @@ EXPORT_SYMBOL(arch_local_irq_restore); * already the case when ppc_md.power_save is called). The function * will return whether to enter power save or just return. * - * In the former case, it will have notified lockdep of interrupts - * being re-enabled and generally sanitized the lazy irq state, - * and in the latter case it will leave with interrupts hard + * In the former case, it will have generally sanitized the lazy irq + * state, and in the latter case it will leave with interrupts hard * disabled and marked as such, so the local_irq_enable() call * in arch_cpu_idle() will properly re-enable everything. */ @@ -370,9 +369,6 @@ __cpuidle bool prep_irq_for_idle(void) if (lazy_irq_pending()) return false; - /* Tell lockdep we are about to re-enable */ - trace_hardirqs_on(); - /* * Mark interrupts as soft-enabled and clear the * PACA_IRQ_HARD_DIS from the pending mask since we