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KVM: x86: don't take kvm->irq_lock when creating IRQCHIP 

I don't see any reason any more for this lock, seemed to be used to protect
removal of kvm->arch.vpic / kvm->arch.vioapic when already partially
inititalized, now access is properly protected using kvm->arch.irqchip_mode
and this shouldn't be necessary anymore.

Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
This commit is contained in:
David Hildenbrand 2017-04-07 10:50:28 +02:00 committed by Radim Krčmář
parent 33392b4911
commit ba7454e17f
1 changed files with 0 additions and 2 deletions
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2
arch/x86/kvm/x86.c
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@ -4028,10 +4028,8 @@ long kvm_arch_vm_ioctl(struct file *filp,
/* Pairs with smp_rmb() when reading irqchip_mode */
smp_wmb();
mutex_lock(&kvm->slots_lock);
mutex_lock(&kvm->irq_lock);
kvm_ioapic_destroy(kvm);
kvm_pic_destroy(kvm);
mutex_unlock(&kvm->irq_lock);
mutex_unlock(&kvm->slots_lock);
goto create_irqchip_unlock;
}