From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757464AbXL3HPn (ORCPT ); Sun, 30 Dec 2007 02:15:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756313AbXL3HLB (ORCPT ); Sun, 30 Dec 2007 02:11:01 -0500 Received: from il.qumranet.com ([82.166.9.18]:59485 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753087AbXL3HKp (ORCPT ); Sun, 30 Dec 2007 02:10:45 -0500 From: Avi Kivity To: linux-kernel@vger.kernel.org, kvm-devel@lists.sourceforge.net Cc: Izik Eidus Subject: [PATCH 19/52] KVM: Simplify kvm_clear_guest_page() Date: Sun, 30 Dec 2007 09:10:05 +0200 Message-Id: <1198998638-22713-20-git-send-email-avi@qumranet.com> X-Mailer: git-send-email 1.5.3.7 In-Reply-To: <1198998638-22713-1-git-send-email-avi@qumranet.com> References: <1198998638-22713-1-git-send-email-avi@qumranet.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Izik Eidus Use kvm_write_guest_page() with empty_zero_page, instead of doing kmap and memset. Signed-off-by: Izik Eidus Signed-off-by: Avi Kivity --- drivers/kvm/kvm_main.c | 17 +---------------- 1 files changed, 1 insertions(+), 16 deletions(-) diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index f9fd865..469e6b4 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -633,22 +633,7 @@ int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) { - void *page_virt; - struct page *page; - - page = gfn_to_page(kvm, gfn); - if (is_error_page(page)) { - kvm_release_page(page); - return -EFAULT; - } - page_virt = kmap_atomic(page, KM_USER0); - - memset(page_virt + offset, 0, len); - - kunmap_atomic(page_virt, KM_USER0); - kvm_release_page(page); - mark_page_dirty(kvm, gfn); - return 0; + return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len); } EXPORT_SYMBOL_GPL(kvm_clear_guest_page); -- 1.5.3.7