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Subject[PATCH 07/10] cpu: change cpu_sys_devices from array to per_cpu variable
Change cpu_sys_devices from array to per_cpu variable in
drivers/base/cpu.c.

Based on:
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86.git

(MAINTAINER unknown)
Signed-off-by: Mike Travis <travis@sgi.com>
---
drivers/base/cpu.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
--- linux.trees.git.orig/drivers/base/cpu.c
+++ linux.trees.git/drivers/base/cpu.c
@@ -18,7 +18,7 @@ struct sysdev_class cpu_sysdev_class = {
};
EXPORT_SYMBOL(cpu_sysdev_class);

-static struct sys_device *cpu_sys_devices[NR_CPUS];
+static DEFINE_PER_CPU(struct sys_device *, cpu_sys_devices);

#ifdef CONFIG_HOTPLUG_CPU
static ssize_t show_online(struct sys_device *dev, char *buf)
@@ -68,7 +68,7 @@ void unregister_cpu(struct cpu *cpu)
sysdev_remove_file(&cpu->sysdev, &attr_online);

sysdev_unregister(&cpu->sysdev);
- cpu_sys_devices[logical_cpu] = NULL;
+ per_cpu(cpu_sys_devices, logical_cpu) = NULL;
return;
}
#else /* ... !CONFIG_HOTPLUG_CPU */
@@ -122,7 +122,7 @@ int __cpuinit register_cpu(struct cpu *c
if (!error && cpu->hotpluggable)
register_cpu_control(cpu);
if (!error)
- cpu_sys_devices[num] = &cpu->sysdev;
+ per_cpu(cpu_sys_devices, num) = &cpu->sysdev;
if (!error)
register_cpu_under_node(num, cpu_to_node(num));

@@ -135,8 +135,8 @@ int __cpuinit register_cpu(struct cpu *c

struct sys_device *get_cpu_sysdev(unsigned cpu)
{
- if (cpu < NR_CPUS)
- return cpu_sys_devices[cpu];
+ if (cpu < nr_cpu_ids && cpu_possible(cpu))
+ return per_cpu(cpu_sys_devices, cpu);
else
return NULL;
}
--


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