From patchwork Tue Oct 24 15:18:07 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: 737912 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6546F31A89; Tue, 24 Oct 2023 15:18:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="KMVeJnaK" 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 A537910E3; Tue, 24 Oct 2023 08:18:13 -0700 (PDT) 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=X5Z3Nkf5E4AARS+LHoFvElPsf0E44YGYiNzXX8jAQTI=; b=KMVeJnaKKwNEXhfQUmDrES4Snp XVvjqbxfqo6dLoYwamROVwhdcf+ZovVQJI7nDYDGQtcNIXjfIT8e7KsFeto4CPCANkXvu4t9K4Y+g 8EGsTU5QpumHaaHipUSZyR13cFFVehwjO/0SFEc+a9oyQs8c2MGh5V3uwAXUPf7q0fXPquP3hLEJy Yzqs5yQ5uo1f5zI1l2MQZ9XL7/fXlSAGmRdqC0+pVYMp1Z9i9VoONTVYY/uld4OO+hy99c97jEcyL Hniy37vHKdoNG4BwZgaojb/AMgXRdKgZ2qQQjWXVjYQP8wKJN0AeDHybJXL9JPfGFMLw+qJ5Nr0tt HjcFxc7g==; Received: from e0022681537dd.dyn.armlinux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:57434 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 1qvJAU-0004SZ-0c; Tue, 24 Oct 2023 16:18:06 +0100 Received: from rmk by rmk-PC.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1qvJAV-00AqR4-LS; Tue, 24 Oct 2023 16:18:07 +0100 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" , Paul Walmsley , Palmer Dabbelt , Albert Ou Subject: [PATCH 23/39] drivers: base: Implement weak arch_unregister_cpu() Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Message-Id: Sender: Russell King Date: Tue, 24 Oct 2023 16:18:07 +0100 From: James Morse Add arch_unregister_cpu() to allow the ACPI machinery to call unregister_cpu(). This is enough for arm64, riscv and loongarch, but needs to be overridden by x86 and ia64 who need to do more work. CC: Jean-Philippe Brucker Signed-off-by: James Morse --- Changes since v1: * Added CONFIG_HOTPLUG_CPU ifdeffery around unregister_cpu Changes since RFC v2: * Move earlier in the series --- drivers/base/cpu.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 6c70a004c198..2b9cb2667654 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -531,7 +531,14 @@ int __weak arch_register_cpu(int cpu) { return register_cpu(&per_cpu(cpu_devices, cpu), cpu); } -#endif + +#ifdef CONFIG_HOTPLUG_CPU +void __weak arch_unregister_cpu(int num) +{ + unregister_cpu(&per_cpu(cpu_devices, num)); +} +#endif /* CONFIG_HOTPLUG_CPU */ +#endif /* CONFIG_GENERIC_CPU_DEVICES */ static void __init cpu_dev_register_generic(void) {