From patchwork Mon Nov 16 12:19:23 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Avi Kivity X-Patchwork-Id: 60342 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id nAGCTktW020988 for ; Mon, 16 Nov 2009 12:29:50 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752825AbZKPM1Y (ORCPT ); Mon, 16 Nov 2009 07:27:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753234AbZKPMUA (ORCPT ); Mon, 16 Nov 2009 07:20:00 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37767 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752911AbZKPMTm (ORCPT ); Mon, 16 Nov 2009 07:19:42 -0500 Received: from int-mx04.intmail.prod.int.phx2.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.17]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id nAGCJlnp014250 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 16 Nov 2009 07:19:48 -0500 Received: from cleopatra.tlv.redhat.com (cleopatra.tlv.redhat.com [10.35.255.11]) by int-mx04.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id nAGCJjLc025307; Mon, 16 Nov 2009 07:19:47 -0500 Received: from localhost.localdomain (file.tlv.redhat.com [10.35.255.8]) by cleopatra.tlv.redhat.com (Postfix) with ESMTP id 21032A0179; Mon, 16 Nov 2009 14:19:44 +0200 (IST) From: Avi Kivity To: linux-kernel@vger.kernel.org Cc: kvm@vger.kernel.org Subject: [PATCH 22/42] KVM: SVM: remove needless mmap_sem acquision from nested_svm_map Date: Mon, 16 Nov 2009 14:19:23 +0200 Message-Id: <1258373983-8693-23-git-send-email-avi@redhat.com> In-Reply-To: <1258373983-8693-1-git-send-email-avi@redhat.com> References: <1258373983-8693-1-git-send-email-avi@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.17 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 92048a6..f54c4f9 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1396,10 +1396,7 @@ static void *nested_svm_map(struct vcpu_svm *svm, u64 gpa, enum km_type idx) { struct page *page; - down_read(¤t->mm->mmap_sem); page = gfn_to_page(svm->vcpu.kvm, gpa >> PAGE_SHIFT); - up_read(¤t->mm->mmap_sem); - if (is_error_page(page)) goto error;