Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752961AbaK3PMI (ORCPT ); Sun, 30 Nov 2014 10:12:08 -0500 Received: from mx1.redhat.com ([209.132.183.28]:59735 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752921AbaK3PMB (ORCPT ); Sun, 30 Nov 2014 10:12:01 -0500 Date: Sun, 30 Nov 2014 17:11:44 +0200 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: David Miller , cornelia.huck@de.ibm.com, rusty@au1.ibm.com, nab@linux-iscsi.org, pbonzini@redhat.com, thuth@linux.vnet.ibm.com, dahi@linux.vnet.ibm.com, Jason Wang , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org Subject: [PATCH v7 30/46] vhost/net: force len for TX to host endian Message-ID: <1417359787-10138-31-git-send-email-mst@redhat.com> References: <1417359787-10138-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1417359787-10138-1-git-send-email-mst@redhat.com> X-Mutt-Fcc: =sent Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org vhost/net keeps a copy of some used ring but (ab)uses length field for internal house-keeping. This works because for tx used length is always 0. Suppress sparse errors: we use native endian-ness internally but never expose it to guest. Signed-off-by: Michael S. Tsirkin Reviewed-by: Jason Wang --- drivers/vhost/net.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 8dae2f7..dce5c58 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -48,15 +48,15 @@ MODULE_PARM_DESC(experimental_zcopytx, "Enable Zero Copy TX;" * status internally; used for zerocopy tx only. */ /* Lower device DMA failed */ -#define VHOST_DMA_FAILED_LEN 3 +#define VHOST_DMA_FAILED_LEN ((__force __virtio32)3) /* Lower device DMA done */ -#define VHOST_DMA_DONE_LEN 2 +#define VHOST_DMA_DONE_LEN ((__force __virtio32)2) /* Lower device DMA in progress */ -#define VHOST_DMA_IN_PROGRESS 1 +#define VHOST_DMA_IN_PROGRESS ((__force __virtio32)1) /* Buffer unused */ -#define VHOST_DMA_CLEAR_LEN 0 +#define VHOST_DMA_CLEAR_LEN ((__force __virtio32)0) -#define VHOST_DMA_IS_DONE(len) ((len) >= VHOST_DMA_DONE_LEN) +#define VHOST_DMA_IS_DONE(len) ((__force u32)(len) >= (__force u32)VHOST_DMA_DONE_LEN) enum { VHOST_NET_FEATURES = VHOST_FEATURES | -- MST -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/