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arm, kvm: fix double lock on cpu_add_remove_lock 

Commit 8146875de7 (arm, kvm: Fix CPU hotplug callback registration)
holds the lock before calling the two functions:

	kvm_vgic_hyp_init()
	kvm_timer_hyp_init()

and both the two functions are calling register_cpu_notifier()
to register cpu notifier, so cause double lock on cpu_add_remove_lock.

Considered that both two functions are only called inside
kvm_arch_init() with holding cpu_add_remove_lock, so simply use
__register_cpu_notifier() to fix the problem.

Fixes: 8146875de7 (arm, kvm: Fix CPU hotplug callback registration)
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ming Lei 2014-04-07 01:36:08 +08:00 committed by Rafael J. Wysocki
parent 467a9e1633
commit 553f809e23
2 changed files with 2 additions and 2 deletions
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2
virt/kvm/arm/arch_timer.c
View File

@ -277,7 +277,7 @@ int kvm_timer_hyp_init(void)
host_vtimer_irq = ppi;
err = register_cpu_notifier(&kvm_timer_cpu_nb);
err = __register_cpu_notifier(&kvm_timer_cpu_nb);
if (err) {
kvm_err("Cannot register timer CPU notifier\n");
goto out_free;

2
virt/kvm/arm/vgic.c
View File

@ -1496,7 +1496,7 @@ int kvm_vgic_hyp_init(void)
goto out;
}
ret = register_cpu_notifier(&vgic_cpu_nb);
ret = __register_cpu_notifier(&vgic_cpu_nb);
if (ret) {
kvm_err("Cannot register vgic CPU notifier\n");
goto out_free_irq;