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Merge git://git.kernel.org/pub/scm/virt/kvm/kvm 

Pull kvm fix from Gleb Natapov.

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: Enable pvspinlock after jump_label_init() to avoid VM hang
This commit is contained in:
Linus Torvalds 2013-10-15 16:22:51 -07:00
parent 36704263f1 3dbef3e3bf
commit b83aea88d3
1 changed files with 15 additions and 4 deletions
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19
arch/x86/kernel/kvm.c
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@ -775,11 +775,22 @@ void __init kvm_spinlock_init(void)
if (!kvm_para_has_feature(KVM_FEATURE_PV_UNHALT))
return;
printk(KERN_INFO "KVM setup paravirtual spinlock\n");
static_key_slow_inc(&paravirt_ticketlocks_enabled);
pv_lock_ops.lock_spinning = PV_CALLEE_SAVE(kvm_lock_spinning);
pv_lock_ops.unlock_kick = kvm_unlock_kick;
}
static __init int kvm_spinlock_init_jump(void)
{
if (!kvm_para_available())
return 0;
if (!kvm_para_has_feature(KVM_FEATURE_PV_UNHALT))
return 0;
static_key_slow_inc(&paravirt_ticketlocks_enabled);
printk(KERN_INFO "KVM setup paravirtual spinlock\n");
return 0;
}
early_initcall(kvm_spinlock_init_jump);
#endif /* CONFIG_PARAVIRT_SPINLOCKS */