From mboxrd@z Thu Jan 1 00:00:00 1970 From: Davidlohr Bueso Subject: [PATCH 2/7] kvm,async_pf: Use swq_has_sleepers() Date: Wed, 13 Sep 2017 13:08:19 -0700 Message-ID: <20170913200824.28067-3-dave@stgolabs.net> References: <20170913200824.28067-1-dave@stgolabs.net> Cc: npiggin@gmail.com, paulmck@linux.vnet.ibm.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, dave@stgolabs.net, Davidlohr Bueso To: mingo@kernel.org, peterz@infradead.org, pbonzini@redhat.com Return-path: In-Reply-To: <20170913200824.28067-1-dave@stgolabs.net> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org ... as we've got the new helper now. This caller already does the right thing, hence no changes in semantics. Signed-off-by: Davidlohr Bueso --- virt/kvm/async_pf.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c index bb298a200cd3..57bcb27dcf30 100644 --- a/virt/kvm/async_pf.c +++ b/virt/kvm/async_pf.c @@ -106,11 +106,7 @@ static void async_pf_execute(struct work_struct *work) trace_kvm_async_pf_completed(addr, gva); - /* - * This memory barrier pairs with prepare_to_wait's set_current_state() - */ - smp_mb(); - if (swait_active(&vcpu->wq)) + if (swq_has_sleeper(&vcpu->wq)) swake_up(&vcpu->wq); mmput(mm); -- 2.12.0