KVM: switch vcpu context to use SRCU

[karo-tx-linux.git] / arch / ia64 / kvm / kvm-ia64.c

diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index d0ad538f0083256185c969b48c03d7ed637184c2..d5e3846412752480cda33850d6f55d5f42f5befd 100644 (file)
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -636,12 +636,9 @@ static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 {
        union context *host_ctx, *guest_ctx;
-       int r;
+       int r, idx;
 
-       /*
-        * down_read() may sleep and return with interrupts enabled
-        */
-       down_read(&vcpu->kvm->slots_lock);
+       idx = srcu_read_lock(&vcpu->kvm->srcu);
 
 again:
        if (signal_pending(current)) {
@@ -663,7 +660,7 @@ again:
        if (r < 0)
                goto vcpu_run_fail;
 
-       up_read(&vcpu->kvm->slots_lock);
+       srcu_read_unlock(&vcpu->kvm->srcu, idx);
        kvm_guest_enter();
 
        /*
@@ -687,7 +684,7 @@ again:
        kvm_guest_exit();
        preempt_enable();
 
-       down_read(&vcpu->kvm->slots_lock);
+       idx = srcu_read_lock(&vcpu->kvm->srcu);
 
        r = kvm_handle_exit(kvm_run, vcpu);
 
@@ -697,10 +694,10 @@ again:
        }
 
 out:
-       up_read(&vcpu->kvm->slots_lock);
+       srcu_read_unlock(&vcpu->kvm->srcu, idx);
        if (r > 0) {
                kvm_resched(vcpu);
-               down_read(&vcpu->kvm->slots_lock);
+               idx = srcu_read_lock(&vcpu->kvm->srcu);
                goto again;
        }