From patchwork Thu Oct 24 17:14:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eugenio Perez Martin X-Patchwork-Id: 11210563 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A76D2112C for ; Thu, 24 Oct 2019 17:35:11 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7D7DF20650 for ; Thu, 24 Oct 2019 17:35:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="OVkBbmp9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7D7DF20650 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:48888 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iNh0w-0001JQ-3G for patchwork-qemu-devel@patchwork.kernel.org; Thu, 24 Oct 2019 13:35:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38134) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iNghV-0002cd-O8 for qemu-devel@nongnu.org; Thu, 24 Oct 2019 13:15:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iNghU-00023Y-OM for qemu-devel@nongnu.org; Thu, 24 Oct 2019 13:15:05 -0400 Received: from us-smtp-1.mimecast.com ([207.211.31.81]:42493 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iNghU-00023O-LQ for qemu-devel@nongnu.org; Thu, 24 Oct 2019 13:15:04 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1571937304; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QHi/ZcZkuogsRdwJr7LU741XrjKiy2gJElKC2Qe6S0E=; b=OVkBbmp9bdPHTi8VUfOHOGnKYXT928/IptIFmlUqyVKFP9qQbqFUDRLXrKK0N4tsC4OvmB ItTYU5qXIUthAwXJG3Sn8L+j/7fJvQ2UVwq16sKcUAI8n0h46441doXWeTYxf8CRiQ2q2n GG08GP3vLQFSZntGCR7xAcLwrCpNTFI= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-143-YEA7LjBPM6G2_I9af-Bt7A-1; Thu, 24 Oct 2019 13:15:00 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C9B54107AD31; Thu, 24 Oct 2019 17:14:59 +0000 (UTC) Received: from eperezma.remote.csb (ovpn-116-206.ams2.redhat.com [10.36.116.206]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5CB9E61F21; Thu, 24 Oct 2019 17:14:50 +0000 (UTC) From: =?utf-8?q?Eugenio_P=C3=A9rez?= To: qemu-devel@nongnu.org Subject: [PATCH v6 8/9] virtio: add some rcu comments Date: Thu, 24 Oct 2019 19:14:05 +0200 Message-Id: <20191024171406.12504-9-eperezma@redhat.com> In-Reply-To: <20191024171406.12504-1-eperezma@redhat.com> References: <20191024171406.12504-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-MC-Unique: YEA7LjBPM6G2_I9af-Bt7A-1 X-Mimecast-Spam-Score: 0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Laurent Vivier , qemu-block@nongnu.org, Amit Shah , Jason Wang , "Michael S. Tsirkin" , Max Reitz , Stefan Hajnoczi , Paolo Bonzini , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Fam Zheng Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Eugenio Pérez --- hw/virtio/virtio.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 3cf12a62c0..9195b08da8 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -278,6 +278,7 @@ static void vring_packed_flags_write(VirtIODevice *vdev, address_space_cache_invalidate(cache, off, sizeof(flags)); } +/* Called within rcu_read_lock(). */ static VRingMemoryRegionCaches *vring_get_region_caches(struct VirtQueue *vq) { VRingMemoryRegionCaches *caches = atomic_rcu_read(&vq->vring.caches); @@ -721,7 +722,6 @@ bool virtqueue_rewind(VirtQueue *vq, unsigned int num) return true; } -/* Called within rcu_read_lock(). */ static void virtqueue_split_fill(VirtQueue *vq, const VirtQueueElement *elem, unsigned int len, unsigned int idx) { @@ -780,6 +780,7 @@ static void virtqueue_packed_fill_desc(VirtQueue *vq, vring_packed_desc_write(vq->vdev, &desc, &caches->desc, head, strict_order); } +/* Called within rcu_read_lock(). */ void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem, unsigned int len, unsigned int idx) {