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oprofile/x86: notify cpus only when daemon is running

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This patch moves the cpu notifier registration from nmi_init() to
nmi_setup(). The corresponding unregistration function is now in
nmi_shutdown(). Thus, the hotplug code is only active, if the oprofile
daemon is running.

Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Robert Richter <robert.richter@amd.com>
This commit is contained in:
Robert Richter 2010-05-03 15:00:25 +02:00
parent d30d64c6da
commit 3de668ee8d
1 changed files with 3 additions and 13 deletions
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16
arch/x86/oprofile/nmi_int.c
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@ -504,6 +504,7 @@ static int nmi_setup(void)
goto fail;
get_online_cpus();
register_cpu_notifier(&oprofile_cpu_nb);
on_each_cpu(nmi_cpu_setup, NULL, 1);
nmi_enabled = 1;
put_online_cpus();
@ -519,6 +520,7 @@ static void nmi_shutdown(void)
struct op_msrs *msrs;
get_online_cpus();
unregister_cpu_notifier(&oprofile_cpu_nb);
on_each_cpu(nmi_cpu_shutdown, NULL, 1);
nmi_enabled = 0;
ctr_running = 0;
@ -739,12 +741,6 @@ int __init op_nmi_init(struct oprofile_operations *ops)
return -ENODEV;
}
get_online_cpus();
register_cpu_notifier(&oprofile_cpu_nb);
nmi_enabled = 0;
ctr_running = 0;
put_online_cpus();
/* default values, can be overwritten by model */
ops->create_files = nmi_create_files;
ops->setup = nmi_setup;
@ -771,14 +767,8 @@ int __init op_nmi_init(struct oprofile_operations *ops)
void op_nmi_exit(void)
{
if (using_nmi) {
if (using_nmi)
exit_sysfs();
get_online_cpus();
unregister_cpu_notifier(&oprofile_cpu_nb);
nmi_enabled = 0;
ctr_running = 0;
put_online_cpus();
}
if (model->exit)
model->exit();
}