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| author | Ming Lei <tom.leiming@gmail.com> | 2014-04-07 01:36:08 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-04-08 13:15:54 +0200 |
| commit | 553f809e23f00976caea7a1ebdabaa58a6383e7d (patch) | |
| tree | 85cce570dee49945280cc4d5233616e1e1537961 | |
| parent | 467a9e1633043810259a7f5368fbcc1e84746137 (diff) | |
| download | linux-553f809e23f00976caea7a1ebdabaa58a6383e7d.tar.bz2 | |
arm, kvm: fix double lock on cpu_add_remove_lock
Commit 8146875de7d4 (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: 8146875de7d4 (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>
| -rw-r--r-- | virt/kvm/arm/arch_timer.c | 2 | ||||
| -rw-r--r-- | 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 5081e809821f..22fa819a9b6a 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 8ca405cd7c1a..47b29834a6b6 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; |