| Subject: hotplug-use-migrate-disable.patch |
| From: Thomas Gleixner <tglx@linutronix.de> |
| Date: Sun, 17 Jul 2011 19:35:29 +0200 |
| |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| --- |
| kernel/cpu.c | 6 +++--- |
| 1 file changed, 3 insertions(+), 3 deletions(-) |
| |
| --- a/kernel/cpu.c |
| +++ b/kernel/cpu.c |
| @@ -403,14 +403,13 @@ static int __ref _cpu_down(unsigned int |
| cpumask_andnot(cpumask, cpu_online_mask, cpumask_of(cpu)); |
| set_cpus_allowed_ptr(current, cpumask); |
| free_cpumask_var(cpumask); |
| - preempt_disable(); |
| + migrate_disable(); |
| mycpu = smp_processor_id(); |
| if (mycpu == cpu) { |
| printk(KERN_ERR "Yuck! Still on unplug CPU\n!"); |
| - preempt_enable(); |
| + migrate_enable(); |
| return -EBUSY; |
| } |
| - preempt_enable(); |
| |
| err = __cpu_notify(CPU_DOWN_PREPARE | mod, hcpu, -1, &nr_calls); |
| if (err) { |
| @@ -461,6 +460,7 @@ static int __ref _cpu_down(unsigned int |
| out_release: |
| cpu_unplug_done(cpu); |
| out_cancel: |
| + migrate_enable(); |
| cpu_hotplug_done(); |
| if (!err) |
| cpu_notify_nofail(CPU_POST_DEAD | mod, hcpu); |
