The patch of "arm, kvm: Fix CPU hotplug callback registration"
in -next tree 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.
Cc: Paolo Bonzini <pbonz...@redhat.com>
Cc: Christoffer Dall <christoffer.d...@linaro.org>
Cc: Srivatsa S. Bhat <srivatsa.b...@linux.vnet.ibm.com>
Cc: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Ming Lei <tom.leim...@gmail.com>
---
virt/kvm/arm/arch_timer.c | 2 +-
virt/kvm/arm/vgic.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 5081e80..22fa819 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -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;
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 8ca405c..47b2983 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -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;
--
1.7.9.5
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