From patchwork Fri Jun 9 07:50:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Shuai X-Patchwork-Id: 13273347 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1A97DC7EE29 for ; Fri, 9 Jun 2023 07:55:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=neDsHFm+JQ/5m/weXyHSrynGvI/AllbM9pcZcrD2cUU=; b=tsFiutvxItTcYm Xy0WXh97ZrtFiAOFsB/3ZaSjRwFOr6CErFzbkwHNRjih6s0MiWBnHsDFMDtBR9Azbele1upIfaXHM aiWukjm3vUFqm+C3UWAYj9olkR4t6VOesTuSu/pJ/YjZGDKEv9pgGmBZatF3XMnh6hpbCWFQUYQQp 1jWjnK1cuEGZsKaVE1QGWTd3CPEMZRtTEuE2GLZ7Sygmwj1GXY1uTHSvZG5gHVDmpjqJxYMSMlHMz xjTr2XfnzSIkkhlYFlczlPRlfLE9gtgQtnswnZiKFecxX8RLN4kKIv+JYVlL5NHIdcLUqSJVSXW6u Is0P7FHfRYZCGB9unsGg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q7Wxt-00C851-1B; Fri, 09 Jun 2023 07:55:21 +0000 Received: from bg4.exmail.qq.com ([43.155.67.158]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q7Wxq-00C82J-17 for linux-riscv@lists.infradead.org; Fri, 09 Jun 2023 07:55:19 +0000 X-QQ-mid: bizesmtp75t1686297188t6m0bx24 Received: from localhost.localdomain ( [58.240.82.166]) by bizesmtp.qq.com (ESMTP) with id ; Fri, 09 Jun 2023 15:53:05 +0800 (CST) X-QQ-SSF: 01200000000000908000000A0000000 X-QQ-FEAT: UMQM+3VOEYsTPC6jMH0yzyXH1849klDsTAUlAptToZKS6J3/4lSimAAJC/4Gj WEUddFwIUU/2iF8bNZxbaQuHxqLUg5SxFyhEmhcPQC534imMFNhOcwHDyehWwvHQii490Zr cnCZorPfAhuqS4hv4C3m/udby3n0mIAvc5zXEG/oeEmxLYGywlgqwxeD0xRGvWfw77lbRKV Vu1L/Fe5f+BRDZPeTPFPWK33uLeuc9WQHaUcuJn8VUUGtDiWWO/JbsTAnVsRta3kqtiGwqe jA1gbcit/YVp+S79o12TSH6qmlBAnmXWtCrNSplYOBBWlUdNVfYES64zkcDROxPzNplA+zD d7eptdHA752wVCXgT2bSBhpDPTXeAiPDt448w1sOQRbijVWdOpLDcg/G0wjKQ== X-QQ-GoodBg: 0 X-BIZMAIL-ID: 18318848536038158331 From: Song Shuai To: catalin.marinas@arm.com, will@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, chris@zankel.net, jcmvbkbc@gmail.com, songshuaishuai@tinylab.org, steven.price@arm.com, vincenzo.frascino@arm.com, leyfoon.tan@starfivetech.com, mason.huo@starfivetech.com, jeeheng.sia@starfivetech.com, conor.dooley@microchip.com, ajones@ventanamicro.com Cc: linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH V2 2/4] arm64: hibernate: remove WARN_ON in save_processor_state Date: Fri, 9 Jun 2023 15:50:47 +0800 Message-Id: <20230609075049.2651723-3-songshuaishuai@tinylab.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230609075049.2651723-1-songshuaishuai@tinylab.org> References: <20230609075049.2651723-1-songshuaishuai@tinylab.org> MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:tinylab.org:qybglogicsvrgz:qybglogicsvrgz5a-3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230609_005518_705291_A5F9BAD6 X-CRM114-Status: UNSURE ( 7.45 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org During hibernation or restoration, freeze_secondary_cpus checks num_online_cpus via BUG_ON, and the subsequent save_processor_state also does the checking with WARN_ON. In the case of CONFIG_PM_SLEEP_SMP=n, freeze_secondary_cpus is not defined, but the sole possible condition to disable CONFIG_PM_SLEEP_SMP is !SMP where num_online_cpus is always 1. We also don't have to check it in save_processor_state. So remove the unnecessary checking in save_processor_state. Signed-off-by: Song Shuai Acked-by: Will Deacon --- arch/arm64/kernel/hibernate.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c index 788597a6b6a2..02870beb271e 100644 --- a/arch/arm64/kernel/hibernate.c +++ b/arch/arm64/kernel/hibernate.c @@ -99,7 +99,6 @@ int pfn_is_nosave(unsigned long pfn) void notrace save_processor_state(void) { - WARN_ON(num_online_cpus() != 1); } void notrace restore_processor_state(void)