On Sat, 2022-12-24 at 03:53 -0500, Paolo Bonzini wrote: > @@ -2005,19 +2009,23 @@ static bool kvm_xen_hcall_evtchn_send(struct > kvm_vcpu *vcpu, u64 param, u64 *r) > gpa_t gpa; > int idx; > > + /* > + * evtchnfd is protected by kvm->srcu; the idr lookup instead > + * is protected by RCU. > + */ > idx = srcu_read_lock(&vcpu->kvm->srcu); > gpa = kvm_mmu_gva_to_gpa_system(vcpu, param, NULL); > - srcu_read_unlock(&vcpu->kvm->srcu, idx); > I removed that srcu_read_lock() in https://lore.kernel.org/kvm/d52040a8d46e68efd86273be66808fe4a8c70e1d.camel@xxxxxxxxxxxxx/ on the basis that this is a hypercall handler, called from the handle_exit function, with the lock already taken.
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