From patchwork Tue Nov 7 10:30:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King (Oracle)" X-Patchwork-Id: 13448361 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 DD566C001B2 for ; Tue, 7 Nov 2023 10:30:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233962AbjKGKa0 (ORCPT ); Tue, 7 Nov 2023 05:30:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40716 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233975AbjKGKaS (ORCPT ); Tue, 7 Nov 2023 05:30:18 -0500 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D733610C1; Tue, 7 Nov 2023 02:30:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Date:Sender:Message-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References: In-Reply-To:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=L39JlpOE9/9CplZsg27RCjms0dZNEQGXOpabTHId0/o=; b=aROF6+R2XtK3lBysJONjCeHJu/ U0NNYX04FcX0h+nxoECSlL4SEsjkNfvaaw4xMTtERNmuCQcpXy3lBZ/p1C2gXp2DLEUA3AGPzAike GCMpQ66isY1S/EnSFhbj1irjZ5gi9Xhf3leVSG/I+988BPorw6vc2a/CHcZ7T08ZLnczR+jG805aN jqer8K6Kevg8fYCGX6w8iTSJwDDXUf308eYJXMQ5ExiLUAwfJ4Un0bsKtRNXKblwQgzQj7MO8zdLW jm21TPrOpkGvDW8oDhwIfnl7LetnsISGkqxbTU5KYqBO/J9vHp40UnF0UVjYTs8giDbilGTvza3Y1 6sknCDGg==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:54884 helo=rmk-PC.armlinux.org.uk) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1r0JLQ-0000FU-0r; Tue, 07 Nov 2023 10:30:04 +0000 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1r0JLQ-00CTxK-Ln; Tue, 07 Nov 2023 10:30:04 +0000 In-Reply-To: References: From: "Russell King (Oracle)" To: linux-pm@vger.kernel.org, loongarch@lists.linux.dev, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, kvmarm@lists.linux.dev, x86@kernel.org, linux-csky@vger.kernel.org, linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org Cc: Salil Mehta , Jean-Philippe Brucker , jianyong.wu@arm.com, justin.he@arm.com, James Morse , Greg Kroah-Hartman , "Rafael J. Wysocki" , Thomas Gleixner , Peter Zijlstra Subject: [PATCH RFC 09/22] drivers: base: add arch_cpu_is_hotpluggable() MIME-Version: 1.0 Content-Disposition: inline Message-Id: Sender: Russell King Date: Tue, 07 Nov 2023 10:30:04 +0000 Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org The differences between architecture specific implementations of arch_register_cpu() are down to whether the CPU is hotpluggable or not. Rather than overriding the weak version of arch_register_cpu(), provide a function that can be used to provide this detail instead. Signed-off-by: Russell King (Oracle) Reviewed-by: Shaoqin Huang Reviewed-by: Gavin Shan Reviewed-by: Jonathan Cameron --- drivers/base/cpu.c | 11 ++++++++++- include/linux/cpu.h | 1 + 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 58bb86091b34..221ffbeb1c9b 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -527,9 +527,18 @@ EXPORT_SYMBOL_GPL(cpu_is_hotpluggable); #ifdef CONFIG_GENERIC_CPU_DEVICES DEFINE_PER_CPU(struct cpu, cpu_devices); +bool __weak arch_cpu_is_hotpluggable(int cpu) +{ + return false; +} + int __weak arch_register_cpu(int cpu) { - return register_cpu(&per_cpu(cpu_devices, cpu), cpu); + struct cpu *c = &per_cpu(cpu_devices, cpu); + + c->hotpluggable = arch_cpu_is_hotpluggable(cpu); + + return register_cpu(c, cpu); } #ifdef CONFIG_HOTPLUG_CPU diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 1e982d63eae8..dcb89c987164 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -80,6 +80,7 @@ extern __printf(4, 5) struct device *cpu_device_create(struct device *parent, void *drvdata, const struct attribute_group **groups, const char *fmt, ...); +extern bool arch_cpu_is_hotpluggable(int cpu); extern int arch_register_cpu(int cpu); extern void arch_unregister_cpu(int cpu); #ifdef CONFIG_HOTPLUG_CPU