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 29FF2C4727D for ; Tue, 29 Sep 2020 13:57:33 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 74B25206B7 for ; Tue, 29 Sep 2020 13:57:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Sv2KBzFK" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 74B25206B7 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:References:In-Reply-To:Message-Id:Date:Subject:To: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=1MUlZcw8RTEdDTLI5rEkVK7TovnGf9uDYfvTypb/ehA=; b=Sv2KBzFKLYdhIIoRM6ExQdMq0e rTAaWfNKhxMFlZD66Mb7n14Ym6tT+aHkYnI2Og8pYJsZ+4sP0xVuLtSQsx/WQejHXHX0CiBRiYr5f vo08ZI2lgNBRvTciNryhghQnHuCRY6LyH+IAKr8D6+zszSsJL5LklqfMRQrO7u0iXP+gAoeMHSf4v XtleMd/m5CjAWfI6+fXL09VJmf7nUjGkGAiTFTqE+ueTrhDha0K5r30OYoxAWUKeCRUzxQUXZlhEU cgODAQWSzD9CzCl6xC4HTe4m/Ug2PjDXwhA8VTTW8NL8/IUDzjPrphDWtEODEgeminkat/uFKj9Kk 8SxcsvLQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kNG6j-0000XA-Ta; Tue, 29 Sep 2020 13:55:54 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kNG6T-0000S2-4i for linux-arm-kernel@lists.infradead.org; Tue, 29 Sep 2020 13:55:38 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7E8CF31B; Tue, 29 Sep 2020 06:55:36 -0700 (PDT) Received: from p8cg001049571a15.blr.arm.com (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id E87303F6CF; Tue, 29 Sep 2020 06:55:32 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org Subject: [PATCH V4 1/3] arm64/mm/hotplug: Register boot memory hot remove notifier earlier Date: Tue, 29 Sep 2020 19:24:45 +0530 Message-Id: <1601387687-6077-2-git-send-email-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1601387687-6077-1-git-send-email-anshuman.khandual@arm.com> References: <1601387687-6077-1-git-send-email-anshuman.khandual@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200929_095537_257399_D09C648A X-CRM114-Status: GOOD ( 15.76 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , gshan@redhat.com, Anshuman Khandual , catalin.marinas@arm.com, Steve Capper , linux-kernel@vger.kernel.org, Mark Brown , Marc Zyngier , will@kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This moves memory notifier registration earlier in the boot process from device_initcall() to early_initcall() which will help in guarding against potential early boot memory offline requests. Even though there should not be any actual offlinig requests till memory block devices are initialized with memory_dev_init() but then generic init sequence might just change in future. Hence an early registration for the memory event notifier would be helpful. While here, just skip the registration if CONFIG_MEMORY_HOTREMOVE is not enabled and also call out when memory notifier registration fails. Cc: Catalin Marinas Cc: Will Deacon Cc: Mark Rutland Cc: Marc Zyngier Cc: Steve Capper Cc: Mark Brown Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Gavin Shan Signed-off-by: Anshuman Khandual --- arch/arm64/mm/mmu.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 75df62fea1b6..4e70f4fea06c 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1499,7 +1499,16 @@ static struct notifier_block prevent_bootmem_remove_nb = { static int __init prevent_bootmem_remove_init(void) { - return register_memory_notifier(&prevent_bootmem_remove_nb); + int ret = 0; + + if (!IS_ENABLED(CONFIG_MEMORY_HOTREMOVE)) + return ret; + + ret = register_memory_notifier(&prevent_bootmem_remove_nb); + if (ret) + pr_err("%s: Notifier registration failed %d\n", __func__, ret); + + return ret; } -device_initcall(prevent_bootmem_remove_init); +early_initcall(prevent_bootmem_remove_init); #endif -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel