diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c index 558b83368559..254c507a608c 100644 --- a/arch/alpha/kernel/setup.c +++ b/arch/alpha/kernel/setup.c @@ -481,7 +481,7 @@ register_cpus(void) struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); if (!p) return -ENOMEM; - register_cpu(p, i, NULL); + register_cpu(p, i); } return 0; } diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 9fc9af88c60c..093ccba0503c 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -808,7 +808,7 @@ static int __init topology_init(void) int cpu; for_each_possible_cpu(cpu) - register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu, NULL); + register_cpu(&per_cpu(cpu_data, cpu).cpu, cpu); return 0; } diff --git a/arch/i386/kernel/topology.c b/arch/i386/kernel/topology.c index 1eecc2e1bd4b..e2e281d4bcc8 100644 --- a/arch/i386/kernel/topology.c +++ b/arch/i386/kernel/topology.c @@ -32,15 +32,8 @@ static struct i386_cpu cpu_devices[NR_CPUS]; -int arch_register_cpu(int num){ - struct node *parent = NULL; - -#ifdef CONFIG_NUMA - int node = cpu_to_node(num); - if (node_online(node)) - parent = &node_devices[parent_node(node)]; -#endif /* CONFIG_NUMA */ - +int arch_register_cpu(int num) +{ /* * CPU0 cannot be offlined due to several * restrictions and assumptions in kernel. This basically @@ -50,21 +43,13 @@ int arch_register_cpu(int num){ if (!num) cpu_devices[num].cpu.no_control = 1; - return register_cpu(&cpu_devices[num].cpu, num, parent); + return register_cpu(&cpu_devices[num].cpu, num); } #ifdef CONFIG_HOTPLUG_CPU void arch_unregister_cpu(int num) { - struct node *parent = NULL; - -#ifdef CONFIG_NUMA - int node = cpu_to_node(num); - if (node_online(node)) - parent = &node_devices[parent_node(node)]; -#endif /* CONFIG_NUMA */ - - return unregister_cpu(&cpu_devices[num].cpu, parent); + return unregister_cpu(&cpu_devices[num].cpu); } EXPORT_SYMBOL(arch_register_cpu); EXPORT_SYMBOL(arch_unregister_cpu); diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c index 42cb05bdc680..5737c9a061ef 100644 --- a/arch/ia64/kernel/topology.c +++ b/arch/ia64/kernel/topology.c @@ -30,12 +30,6 @@ static struct ia64_cpu *sysfs_cpus; int arch_register_cpu(int num) { - struct node *parent = NULL; - -#ifdef CONFIG_NUMA - parent = &node_devices[cpu_to_node(num)]; -#endif /* CONFIG_NUMA */ - #if defined (CONFIG_ACPI) && defined (CONFIG_HOTPLUG_CPU) /* * If CPEI cannot be re-targetted, and this is @@ -45,21 +39,14 @@ int arch_register_cpu(int num) sysfs_cpus[num].cpu.no_control = 1; #endif - return register_cpu(&sysfs_cpus[num].cpu, num, parent); + return register_cpu(&sysfs_cpus[num].cpu, num); } #ifdef CONFIG_HOTPLUG_CPU void arch_unregister_cpu(int num) { - struct node *parent = NULL; - -#ifdef CONFIG_NUMA - int node = cpu_to_node(num); - parent = &node_devices[node]; -#endif /* CONFIG_NUMA */ - - return unregister_cpu(&sysfs_cpus[num].cpu, parent); + return unregister_cpu(&sysfs_cpus[num].cpu); } EXPORT_SYMBOL(arch_register_cpu); EXPORT_SYMBOL(arch_unregister_cpu); diff --git a/arch/m32r/kernel/setup.c b/arch/m32r/kernel/setup.c index 3cd3c2988a48..1ff483c8a4c9 100644 --- a/arch/m32r/kernel/setup.c +++ b/arch/m32r/kernel/setup.c @@ -275,7 +275,7 @@ static int __init topology_init(void) int i; for_each_present_cpu(i) - register_cpu(&cpu_devices[i], i, NULL); + register_cpu(&cpu_devices[i], i); return 0; } diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index 298f82fe8440..9096a5ea4229 100644 --- a/arch/mips/kernel/smp.c +++ b/arch/mips/kernel/smp.c @@ -446,7 +446,7 @@ static int __init topology_init(void) int ret; for_each_present_cpu(cpu) { - ret = register_cpu(&per_cpu(cpu_devices, cpu), cpu, NULL); + ret = register_cpu(&per_cpu(cpu_devices, cpu), cpu); if (ret) printk(KERN_WARNING "topology_init: register_cpu %d " "failed (%d)\n", cpu, ret); diff --git a/arch/parisc/kernel/topology.c b/arch/parisc/kernel/topology.c index 3ba040050e4c..068b20d822e7 100644 --- a/arch/parisc/kernel/topology.c +++ b/arch/parisc/kernel/topology.c @@ -26,11 +26,10 @@ static struct cpu cpu_devices[NR_CPUS] __read_mostly; static int __init topology_init(void) { - struct node *parent = NULL; int num; for_each_present_cpu(num) { - register_cpu(&cpu_devices[num], num, parent); + register_cpu(&cpu_devices[num], num); } return 0; } diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index e5a44812441a..0932a62a1c96 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -215,7 +215,7 @@ int __init ppc_init(void) /* register CPU devices */ for_each_possible_cpu(i) - register_cpu(&cpu_devices[i], i, NULL); + register_cpu(&cpu_devices[i], i); /* call platform init */ if (ppc_md.init != NULL) { diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c index 338491d1604a..412ad00e222d 100644 --- a/arch/powerpc/kernel/sysfs.c +++ b/arch/powerpc/kernel/sysfs.c @@ -348,23 +348,13 @@ static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL); static int __init topology_init(void) { int cpu; - struct node *parent = NULL; register_nodes(); - register_cpu_notifier(&sysfs_cpu_nb); for_each_possible_cpu(cpu) { struct cpu *c = &per_cpu(cpu_devices, cpu); -#ifdef CONFIG_NUMA - /* The node to which a cpu belongs can't be known - * until the cpu is made present. - */ - parent = NULL; - if (cpu_present(cpu)) - parent = &node_devices[cpu_to_node(cpu)]; -#endif /* * For now, we just see if the system supports making * the RTAS calls for CPU hotplug. But, there may be a @@ -376,7 +366,7 @@ static int __init topology_init(void) c->no_control = 1; if (cpu_online(cpu) || (c->no_control == 0)) { - register_cpu(c, cpu, parent); + register_cpu(c, cpu); sysdev_create_file(&c->sysdev, &attr_physical_id); } diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c index 1f79e84ab464..4b4607d89bfa 100644 --- a/arch/ppc/kernel/setup.c +++ b/arch/ppc/kernel/setup.c @@ -475,7 +475,7 @@ int __init ppc_init(void) /* register CPU devices */ for_each_possible_cpu(i) - register_cpu(&cpu_devices[i], i, NULL); + register_cpu(&cpu_devices[i], i); /* call platform init */ if (ppc_md.init != NULL) { diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 343120c9223d..8e03219eea76 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -869,7 +869,7 @@ static int __init topology_init(void) int ret; for_each_possible_cpu(cpu) { - ret = register_cpu(&per_cpu(cpu_devices, cpu), cpu, NULL); + ret = register_cpu(&per_cpu(cpu_devices, cpu), cpu); if (ret) printk(KERN_WARNING "topology_init: register_cpu %d " "failed (%d)\n", cpu, ret); diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index bb229ef030f3..9af22116c9a2 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -402,7 +402,7 @@ static int __init topology_init(void) int cpu_id; for_each_possible_cpu(cpu_id) - register_cpu(&cpu[cpu_id], cpu_id, NULL); + register_cpu(&cpu[cpu_id], cpu_id); return 0; } diff --git a/arch/sh64/kernel/setup.c b/arch/sh64/kernel/setup.c index d2711c9c9d13..da98d8dbcf95 100644 --- a/arch/sh64/kernel/setup.c +++ b/arch/sh64/kernel/setup.c @@ -309,7 +309,7 @@ static struct cpu cpu[1]; static int __init topology_init(void) { - return register_cpu(cpu, 0, NULL); + return register_cpu(cpu, 0); } subsys_initcall(topology_init); diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c index a6a7d8168346..116d9632002d 100644 --- a/arch/sparc64/kernel/setup.c +++ b/arch/sparc64/kernel/setup.c @@ -537,7 +537,7 @@ static int __init topology_init(void) for_each_possible_cpu(i) { struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); if (p) { - register_cpu(p, i, NULL); + register_cpu(p, i); err = 0; } } diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index dd712b24ec91..3972d8ac9786 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -8,6 +8,7 @@ #include #include #include +#include #include "base.h" @@ -57,13 +58,12 @@ static void __devinit register_cpu_control(struct cpu *cpu) { sysdev_create_file(&cpu->sysdev, &attr_online); } -void unregister_cpu(struct cpu *cpu, struct node *root) +void unregister_cpu(struct cpu *cpu) { int logical_cpu = cpu->sysdev.id; - if (root) - sysfs_remove_link(&root->sysdev.kobj, - kobject_name(&cpu->sysdev.kobj)); + unregister_cpu_under_node(logical_cpu, cpu_to_node(logical_cpu)); + sysdev_remove_file(&cpu->sysdev, &attr_online); sysdev_unregister(&cpu->sysdev); @@ -109,23 +109,21 @@ static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL); * * Initialize and register the CPU device. */ -int __devinit register_cpu(struct cpu *cpu, int num, struct node *root) +int __devinit register_cpu(struct cpu *cpu, int num) { int error; - cpu->node_id = cpu_to_node(num); cpu->sysdev.id = num; cpu->sysdev.cls = &cpu_sysdev_class; error = sysdev_register(&cpu->sysdev); - if (!error && root) - error = sysfs_create_link(&root->sysdev.kobj, - &cpu->sysdev.kobj, - kobject_name(&cpu->sysdev.kobj)); + if (!error && !cpu->no_control) register_cpu_control(cpu); if (!error) cpu_sys_devices[num] = &cpu->sysdev; + if (!error) + register_cpu_under_node(num, cpu_to_node(num)); #ifdef CONFIG_KEXEC if (!error) diff --git a/drivers/base/node.c b/drivers/base/node.c index cbd0f62b4870..eae2bdc183bb 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -11,6 +11,7 @@ #include #include #include +#include static struct sysdev_class node_class = { set_kset_name("node"), @@ -192,9 +193,38 @@ void unregister_node(struct node *node) struct node node_devices[MAX_NUMNODES]; +/* + * register cpu under node + */ +int register_cpu_under_node(unsigned int cpu, unsigned int nid) +{ + if (node_online(nid)) { + struct sys_device *obj = get_cpu_sysdev(cpu); + if (!obj) + return 0; + return sysfs_create_link(&node_devices[nid].sysdev.kobj, + &obj->kobj, + kobject_name(&obj->kobj)); + } + + return 0; +} + +int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) +{ + if (node_online(nid)) { + struct sys_device *obj = get_cpu_sysdev(cpu); + if (obj) + sysfs_remove_link(&node_devices[nid].sysdev.kobj, + kobject_name(&obj->kobj)); + } + return 0; +} + int register_one_node(int nid) { int error = 0; + int cpu; if (node_online(nid)) { int p_node = parent_node(nid); @@ -204,6 +234,12 @@ int register_one_node(int nid) parent = &node_devices[p_node]; error = register_node(&node_devices[nid], nid, parent); + + /* link cpu under this node */ + for_each_present_cpu(cpu) { + if (cpu_to_node(cpu) == nid) + register_cpu_under_node(cpu, nid); + } } return error; diff --git a/include/linux/cpu.h b/include/linux/cpu.h index 08d50c53aab4..b23bf1c8addc 100644 --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -31,10 +31,10 @@ struct cpu { struct sys_device sysdev; }; -extern int register_cpu(struct cpu *, int, struct node *); +extern int register_cpu(struct cpu *cpu, int num); extern struct sys_device *get_cpu_sysdev(unsigned cpu); #ifdef CONFIG_HOTPLUG_CPU -extern void unregister_cpu(struct cpu *, struct node *); +extern void unregister_cpu(struct cpu *cpu); #endif struct notifier_block; diff --git a/include/linux/node.h b/include/linux/node.h index 1e5347527fa8..81dcec84cd8f 100644 --- a/include/linux/node.h +++ b/include/linux/node.h @@ -32,6 +32,19 @@ extern int register_node(struct node *, int, struct node *); extern void unregister_node(struct node *node); extern int register_one_node(int nid); extern void unregister_one_node(int nid); +#ifdef CONFIG_NUMA +extern int register_cpu_under_node(unsigned int cpu, unsigned int nid); +extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid); +#else +static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) +{ + return 0; +} +static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) +{ + return 0; +} +#endif #define to_node(sys_device) container_of(sys_device, struct node, sysdev)