On Wed, Jun 6, 2012 at 1:33 PM, richard -rw- weinberger
<richard.weinber...@gmail.com> wrote:
> Okay, I have an idea what's going on.
> I'll send a patch ASAP.
>
Does the attached patch solve the problem?
--
Thanks,
//richard
diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common
index a923483..b37ae70 100644
--- a/arch/um/Kconfig.common
+++ b/arch/um/Kconfig.common
@@ -8,6 +8,7 @@ config UML
default y
select HAVE_GENERIC_HARDIRQS
select GENERIC_IRQ_SHOW
+ select GENERIC_CPU_DEVICES
config MMU
bool
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index d57e8d0..70f3fe9 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -168,4 +168,8 @@ config SYS_HYPERVISOR
bool
default n
+config GENERIC_CPU_DEVICES
+ bool
+ default n
+
endmenu
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 251acea..389089a 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -11,6 +11,7 @@
#include <linux/device.h>
#include <linux/node.h>
#include <linux/gfp.h>
+#include <linux/percpu.h>
#include "base.h"
@@ -247,6 +248,22 @@ struct sys_device *get_cpu_sysdev(unsigned cpu)
}
EXPORT_SYMBOL_GPL(get_cpu_sysdev);
+#ifdef CONFIG_GENERIC_CPU_DEVICES
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+#endif
+
+static void __init cpu_dev_register_generic(void)
+{
+#ifdef CONFIG_GENERIC_CPU_DEVICES
+ int i;
+
+ for_each_possible_cpu(i) {
+ if (register_cpu(&per_cpu(cpu_devices, i), i))
+ panic("Failed to register CPU device");
+ }
+#endif
+}
+
int __init cpu_dev_init(void)
{
int err;
@@ -257,6 +274,8 @@ int __init cpu_dev_init(void)
err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class);
#endif
+ cpu_dev_register_generic();
+
return err;
}
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