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authorMarcelo Tosatti <mtosatti@redhat.com>2009-12-23 19:35:25 +0300
committerMarcelo Tosatti <mtosatti@redhat.com>2010-03-01 18:35:45 +0300
commitf656ce0185cabbbb0cf96877306879661297c7ad (patch)
treee2c8e61642ae4849c901922552a1acf0112461b4 /arch/ia64
parente93f8a0f821e290ac5149830110a5f704db7a1fc (diff)
downloadlinux-f656ce0185cabbbb0cf96877306879661297c7ad.tar.xz
KVM: switch vcpu context to use SRCU
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/ia64')
-rw-r--r--arch/ia64/kvm/kvm-ia64.c15
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;
}