KVM: switch vcpu context to use SRCU

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 6 insertions, 9 deletions

diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index d0ad538f0083..d5e384641275 100644
--- 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;
         }