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WSL2-Linux-Kernel
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i386: do cpuid_device_create() in CPU_UP_PREPARE instead of CPU_ONLINE. 

Do cpuid_device_create() in CPU_UP_PREPARE instead of CPU_ONLINE.

[ tglx: arch/x86 adaptation ]

Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Akinobu Mita 2007-10-19 20:35:03 +02:00 коммит произвёл Thomas Gleixner
Родитель 66d16ed45d
Коммит 1f503e7743
1 изменённых файлов: 19 добавлений и 13 удалений
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32
arch/x86/kernel/cpuid.c
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@ -134,15 +134,18 @@ static const struct file_operations cpuid_fops = {
.open = cpuid_open, .open = cpuid_open,
}; };
static int __cpuinit cpuid_device_create(int i) static __cpuinit int cpuid_device_create(int cpu)
{ {
int err = 0;
struct device *dev; struct device *dev;
dev = device_create(cpuid_class, NULL, MKDEV(CPUID_MAJOR, i), "cpu%d",i); dev = device_create(cpuid_class, NULL, MKDEV(CPUID_MAJOR, cpu),
if (IS_ERR(dev)) "cpu%d", cpu);
err = PTR_ERR(dev); return IS_ERR(dev) ? PTR_ERR(dev) : 0;
return err; }
static void cpuid_device_destroy(int cpu)
{
device_destroy(cpuid_class, MKDEV(CPUID_MAJOR, cpu));
} }
static int __cpuinit cpuid_class_cpu_callback(struct notifier_block *nfb, static int __cpuinit cpuid_class_cpu_callback(struct notifier_block *nfb,
@ -150,18 +153,21 @@ static int __cpuinit cpuid_class_cpu_callback(struct notifier_block *nfb,
void *hcpu) void *hcpu)
{ {
unsigned int cpu = (unsigned long)hcpu; unsigned int cpu = (unsigned long)hcpu;
int err = 0;
switch (action) { switch (action) {
case CPU_ONLINE: case CPU_UP_PREPARE:
case CPU_ONLINE_FROZEN: case CPU_UP_PREPARE_FROZEN:
cpuid_device_create(cpu); err = cpuid_device_create(cpu);
break; break;
case CPU_UP_CANCELED:
case CPU_UP_CANCELED_FROZEN:
case CPU_DEAD: case CPU_DEAD:
case CPU_DEAD_FROZEN: case CPU_DEAD_FROZEN:
device_destroy(cpuid_class, MKDEV(CPUID_MAJOR, cpu)); cpuid_device_destroy(cpu);
break; break;
} }
return NOTIFY_OK; return err ? NOTIFY_BAD : NOTIFY_OK;
} }
static struct notifier_block __cpuinitdata cpuid_class_cpu_notifier = static struct notifier_block __cpuinitdata cpuid_class_cpu_notifier =
@ -198,7 +204,7 @@ static int __init cpuid_init(void)
out_class: out_class:
i = 0; i = 0;
for_each_online_cpu(i) { for_each_online_cpu(i) {
device_destroy(cpuid_class, MKDEV(CPUID_MAJOR, i)); cpuid_device_destroy(i);
} }
class_destroy(cpuid_class); class_destroy(cpuid_class);
out_chrdev: out_chrdev:
@ -212,7 +218,7 @@ static void __exit cpuid_exit(void)
int cpu = 0; int cpu = 0;
for_each_online_cpu(cpu) for_each_online_cpu(cpu)
device_destroy(cpuid_class, MKDEV(CPUID_MAJOR, cpu)); cpuid_device_destroy(cpu);
class_destroy(cpuid_class); class_destroy(cpuid_class);
unregister_chrdev(CPUID_MAJOR, "cpu/cpuid"); unregister_chrdev(CPUID_MAJOR, "cpu/cpuid");
unregister_hotcpu_notifier(&cpuid_class_cpu_notifier); unregister_hotcpu_notifier(&cpuid_class_cpu_notifier);