From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with SMTP id DCB446B008C for ; Fri, 10 Dec 2010 04:01:19 -0500 (EST) Message-Id: <20101210073242.565520411@intel.com> References: <20101210073119.156388875@intel.com> Date: Fri, 10 Dec 2010 15:31:23 +0800 From: shaohui.zheng@intel.com Subject: [4/7, v9] NUMA Hotplug Emulator: Abstract cpu register functions Content-Disposition: inline; filename=004-hotplug-emulator-x86-abstract-cpu-register-functions.patch Sender: owner-linux-mm@kvack.org To: akpm@linux-foundation.org, linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, haicheng.li@linux.intel.com, lethal@linux-sh.org, ak@linux.intel.com, shaohui.zheng@linux.intel.com, rientjes@google.com, dave@linux.vnet.ibm.com, gregkh@suse.de, Shaohui Zheng List-ID: From: Shaohui Zheng Abstract cpu register functions, provide a more flexible interface register_cpu_node, the new interface provides convenience to add cpu to a specified node, we can use it to add a cpu to a fake node. Signed-off-by: Paul Mundt Signed-off-by: Shaohui Zheng --- Index: linux-hpe4/arch/x86/include/asm/cpu.h =================================================================== --- linux-hpe4.orig/arch/x86/include/asm/cpu.h 2010-11-17 09:00:59.742608402 +0800 +++ linux-hpe4/arch/x86/include/asm/cpu.h 2010-11-17 09:01:10.192838977 +0800 @@ -27,6 +27,7 @@ #ifdef CONFIG_HOTPLUG_CPU extern int arch_register_cpu(int num); +extern int arch_register_cpu_node(int num, int nid); extern void arch_unregister_cpu(int); #endif Index: linux-hpe4/arch/x86/kernel/topology.c =================================================================== --- linux-hpe4.orig/arch/x86/kernel/topology.c 2010-11-17 09:01:01.053461766 +0800 +++ linux-hpe4/arch/x86/kernel/topology.c 2010-11-17 10:05:32.934085248 +0800 @@ -52,6 +52,15 @@ } EXPORT_SYMBOL(arch_register_cpu); +int __ref arch_register_cpu_node(int num, int nid) +{ + if (num) + per_cpu(cpu_devices, num).cpu.hotpluggable = 1; + + return register_cpu_node(&per_cpu(cpu_devices, num).cpu, num, nid); +} +EXPORT_SYMBOL(arch_register_cpu_node); + void arch_unregister_cpu(int num) { unregister_cpu(&per_cpu(cpu_devices, num).cpu); Index: linux-hpe4/drivers/base/cpu.c =================================================================== --- linux-hpe4.orig/drivers/base/cpu.c 2010-11-17 09:01:01.053461766 +0800 +++ linux-hpe4/drivers/base/cpu.c 2010-11-17 10:05:32.943465010 +0800 @@ -208,17 +208,18 @@ static SYSDEV_CLASS_ATTR(offline, 0444, print_cpus_offline, NULL); /* - * register_cpu - Setup a sysfs device for a CPU. + * register_cpu_node - Setup a sysfs device for a CPU. * @cpu - cpu->hotpluggable field set to 1 will generate a control file in * sysfs for this CPU. * @num - CPU number to use when creating the device. + * @nid - Node ID to use, if any. * * Initialize and register the CPU device. */ -int __cpuinit register_cpu(struct cpu *cpu, int num) +int __cpuinit register_cpu_node(struct cpu *cpu, int num, int nid) { int error; - cpu->node_id = cpu_to_node(num); + cpu->node_id = nid; cpu->sysdev.id = num; cpu->sysdev.cls = &cpu_sysdev_class; @@ -229,7 +230,7 @@ if (!error) per_cpu(cpu_sys_devices, num) = &cpu->sysdev; if (!error) - register_cpu_under_node(num, cpu_to_node(num)); + register_cpu_under_node(num, nid); #ifdef CONFIG_KEXEC if (!error) Index: linux-hpe4/include/linux/cpu.h =================================================================== --- linux-hpe4.orig/include/linux/cpu.h 2010-11-17 09:00:59.772898926 +0800 +++ linux-hpe4/include/linux/cpu.h 2010-11-17 10:05:32.954085309 +0800 @@ -30,7 +30,13 @@ struct sys_device sysdev; }; -extern int register_cpu(struct cpu *cpu, int num); +extern int register_cpu_node(struct cpu *cpu, int num, int nid); + +static inline int register_cpu(struct cpu *cpu, int num) +{ + return register_cpu_node(cpu, num, cpu_to_node(num)); +} + extern struct sys_device *get_cpu_sysdev(unsigned cpu); extern int cpu_add_sysdev_attr(struct sysdev_attribute *attr); -- Thanks & Regards, Shaohui -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org