From nobody Fri Apr 10 18:43:23 2026 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 55B69C00140 for ; Mon, 22 Aug 2022 02:16:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232334AbiHVCP7 (ORCPT ); Sun, 21 Aug 2022 22:15:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51850 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229948AbiHVCPu (ORCPT ); Sun, 21 Aug 2022 22:15:50 -0400 Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EAB562183E; Sun, 21 Aug 2022 19:15:48 -0700 (PDT) Received: by mail-pf1-x42d.google.com with SMTP id f17so2876063pfk.11; Sun, 21 Aug 2022 19:15:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc; bh=1iHPy2MJm6s7J5XdJO/siHoKhzaKKWD/EXtuZwe5/AE=; b=mKi9In1cguwoEOIvsqd6r243Uwmb97pem6sMmVbQ/lX7DKmHGQ4Cz8u7NaUAMolab3 HmdgTa5cqnb+GfgxLAPvRC2VcgnhWhU/izaXxri5eH+EgDoV+6M0er9uK9apm/9k6Wa+ O6vWMuPgbVirYyTOwBORRtmkCs2pdpI1E3AlnfMY1g6INcFNsiY5OxCc+eK21YnW41W/ 9gNulkHUPIkdHnMs5921OdcrPwHgoXozCfdiUiIdwYospQ2cvraEremg4xnjuFFKYkFu gDjp9ye/aSfYYNx/jRfdI/eCYmQuHZst3at0UYKdKX8Agaty19wI93E6qRscBDPMtYU4 QtCA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc; bh=1iHPy2MJm6s7J5XdJO/siHoKhzaKKWD/EXtuZwe5/AE=; b=gQurD7zt8PVEr+NP3mGn/+6k0tXJ5MoscnXNzSMiKmZmjLvPObX9wj+HlnsJ6trjLk OX41ToE2aDZVKgGEs3bys+Hg2aTOPMHl2zzs6mWB7gNN4q6AQwKhvS6RI90tJD9R0SeF ow9N0Ca1QaVm8epRdoPzpNIQWxKV8QHX7gTmFeENE/nZVTTLYI0cIp6zG6mCtBGVcEE8 dPhqmxExnHHPCP4976yoMkVwRqS+KP9/xMjAyqos5Z28PJk+KfND+aJGvNT5PQ5ih2oZ yPS+MDVl2R25+2orxw8XNxw3toaDZp6kCH1GJT5zRY49/bRq9T9F6A1Qmr9ReEzJt7iX X2tQ== X-Gm-Message-State: ACgBeo2kJuEgLbiLz49ddHiLK8xN8QT4y5GAbnitr65U0uOWBreuEewo mihkLZ80R09OCes07dQVcg== X-Google-Smtp-Source: AA6agR5RhOvnr+n8C+QckGvAPfLQPD+H4Z9Kyq6FS5FDBt09E1rsRMXpjGgfl8V7Hzvo18Hl1aKTcg== X-Received: by 2002:a63:ce06:0:b0:41d:dcc3:aa6e with SMTP id y6-20020a63ce06000000b0041ddcc3aa6emr15448270pgf.251.1661134548425; Sun, 21 Aug 2022 19:15:48 -0700 (PDT) Received: from piliu.users.ipa.redhat.com ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id k3-20020aa79723000000b005321340753fsm7312139pfg.103.2022.08.21.19.15.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 21 Aug 2022 19:15:47 -0700 (PDT) From: Pingfan Liu To: linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Pingfan Liu , Russell King , Catalin Marinas , Will Deacon , Paul Walmsley , Palmer Dabbelt , Albert Ou , Peter Zijlstra , "Eric W. Biederman" , Mark Rutland , Marco Elver , Masami Hiramatsu , Dan Li , Song Liu , Sami Tolvanen , Arnd Bergmann , Linus Walleij , Ard Biesheuvel , Tony Lindgren , Nick Hawkins , John Crispin , Geert Uytterhoeven , Andrew Morton , Bjorn Andersson , Anshuman Khandual , Thomas Gleixner , Steven Price Subject: [RFC 02/10] cpu/hotplug: Compile smp_shutdown_nonboot_cpus() conditioned on CONFIG_SHUTDOWN_NONBOOT_CPUS Date: Mon, 22 Aug 2022 10:15:12 +0800 Message-Id: <20220822021520.6996-3-kernelfans@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220822021520.6996-1-kernelfans@gmail.com> References: <20220822021520.6996-1-kernelfans@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Only arm/arm64/ia64/riscv share the smp_shutdown_nonboot_cpus(). So compiling this code conditioned on the macro CONFIG_SHUTDOWN_NONBOOT_CPUS. Later this macro will brace the quick kexec reboot code. Signed-off-by: Pingfan Liu Cc: Russell King Cc: Catalin Marinas Cc: Will Deacon Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Peter Zijlstra Cc: "Eric W. Biederman" Cc: Mark Rutland Cc: Marco Elver Cc: Masami Hiramatsu Cc: Dan Li Cc: Song Liu Cc: Sami Tolvanen Cc: Arnd Bergmann Cc: Linus Walleij Cc: Ard Biesheuvel Cc: Tony Lindgren Cc: Nick Hawkins Cc: John Crispin Cc: Geert Uytterhoeven Cc: Andrew Morton Cc: Bjorn Andersson Cc: Anshuman Khandual Cc: Thomas Gleixner Cc: Steven Price To: linux-arm-kernel@lists.infradead.org To: linux-ia64@vger.kernel.org To: linux-riscv@lists.infradead.org To: linux-kernel@vger.kernel.org --- arch/Kconfig | 4 ++++ arch/arm/Kconfig | 1 + arch/arm64/Kconfig | 1 + arch/ia64/Kconfig | 1 + arch/riscv/Kconfig | 1 + kernel/cpu.c | 3 +++ 6 files changed, 11 insertions(+) diff --git a/arch/Kconfig b/arch/Kconfig index f330410da63a..be447537d0f6 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -14,6 +14,10 @@ menu "General architecture-dependent options" config CRASH_CORE bool =20 +config SHUTDOWN_NONBOOT_CPUS + select KEXEC_CORE + bool + config KEXEC_CORE select CRASH_CORE bool diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 87badeae3181..711cfdb4f9f4 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -129,6 +129,7 @@ config ARM select PCI_SYSCALL if PCI select PERF_USE_VMALLOC select RTC_LIB + select SHUTDOWN_NONBOOT_CPUS select SYS_SUPPORTS_APM_EMULATION select THREAD_INFO_IN_TASK select HAVE_ARCH_VMAP_STACK if MMU && ARM_HAS_GROUP_RELOCS diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 571cc234d0b3..8c481a0b1829 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -223,6 +223,7 @@ config ARM64 select PCI_SYSCALL if PCI select POWER_RESET select POWER_SUPPLY + select SHUTDOWN_NONBOOT_CPUS select SPARSE_IRQ select SWIOTLB select SYSCTL_EXCEPTION_TRACE diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 26ac8ea15a9e..8a3ddea97d1b 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -52,6 +52,7 @@ config IA64 select ARCH_CLOCKSOURCE_DATA select GENERIC_TIME_VSYSCALL select LEGACY_TIMER_TICK + select SHUTDOWN_NONBOOT_CPUS select SWIOTLB select SYSCTL_ARCH_UNALIGN_NO_WARN select HAVE_MOD_ARCH_SPECIFIC diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index ed66c31e4655..02606a48c5ea 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -120,6 +120,7 @@ config RISCV select PCI_MSI if PCI select RISCV_INTC select RISCV_TIMER if RISCV_SBI + select SHUTDOWN_NONBOOT_CPUS select SPARSE_IRQ select SYSCTL_EXCEPTION_TRACE select THREAD_INFO_IN_TASK diff --git a/kernel/cpu.c b/kernel/cpu.c index 338e1d426c7e..2be6ba811a01 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -1258,6 +1258,8 @@ int remove_cpu(unsigned int cpu) } EXPORT_SYMBOL_GPL(remove_cpu); =20 +#ifdef CONFIG_SHUTDOWN_NONBOOT_CPUS + void smp_shutdown_nonboot_cpus(unsigned int primary_cpu) { unsigned int cpu; @@ -1299,6 +1301,7 @@ void smp_shutdown_nonboot_cpus(unsigned int primary_c= pu) =20 cpu_maps_update_done(); } +#endif =20 #else #define takedown_cpu NULL --=20 2.31.1