From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB86AC433B4 for ; Mon, 17 May 2021 09:14:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8C7D4611BF for ; Mon, 17 May 2021 09:14:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236092AbhEQJP7 (ORCPT ); Mon, 17 May 2021 05:15:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52746 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235926AbhEQJLI (ORCPT ); Mon, 17 May 2021 05:11:08 -0400 Received: from mail-pg1-x52f.google.com (mail-pg1-x52f.google.com [IPv6:2607:f8b0:4864:20::52f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8FAA9C061763 for ; Mon, 17 May 2021 02:09:52 -0700 (PDT) Received: by mail-pg1-x52f.google.com with SMTP id m190so4221603pga.2 for ; Mon, 17 May 2021 02:09:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=h+Aa0Uk9nuGsTzdkqGHjK7puGuRuX9seCaxiKLJa2BE=; b=AcJrpzueKOT0u4amPtwtBwzuCp6VDlYyVRIEdJTAIWammU3W6pAAc4rRONhlsNG9Gv 1/V/Ak5U7yQ7rLnYBCq8yh5B25VWyDimUbrIW+rpDvEgMJrvzLPxDptLf/AFkeOz7q0g D/zu5a3GrmWcyxl6pvrPIr8fYzu1PB/do/s0mxhZnQfMBbdSNVMRsSWGel3y4Ql7qlo5 A0YTct6Jg6cMzwzVf68QThM9pSxCiYmG/TtyotBP6dMrq8vvpCvITtwIhl1aL2e+uRlX D0HtRW7YZXatSuCSDQr/ppOGN5XA2QcBKM3q8UvCJaKNqRGmAAgP7hOfl/V+3MZ8g062 IG8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=h+Aa0Uk9nuGsTzdkqGHjK7puGuRuX9seCaxiKLJa2BE=; b=HCvhwRezsqF+t5RCBg3zO1lg0MfCUSSRAkgTblgkVpowY7NvzTig0TQgpBqElSFubf 5lXrsUaUDGFBkhnRdautgmzmeBKJUwFuRPSBDajpCzwIXZAHuSLBipdw7EagVNBE9woc eYu6CmJodfKcBX05zzLjI36ADbWDPg1dAz6UmVmG+opvX1TbNTZ4jQ7+4s9fB/O9C8Sd Jo4iC2W/1p4z4wUAk8FWa5u3P5VAfAOa6CsDb2t92xfRK7Qma+su9sujdpznoYBjKPHW s2U/FgJLIpkvKkX5j2Dl4LvrBjxoA9NO/tuEzaQDl+yEAa1szDdXZ5D2tN5Es2AuciGA Yx/g== X-Gm-Message-State: AOAM530LlNg8Gl0fnOoyVPBkgVnitMWMCcbliQW4MHtUyVVchtx+h1AT KBTVA8Nl6mKDlzmKj2XuqKMv X-Google-Smtp-Source: ABdhPJzLj/C5eD+IjImaTtRsjiwSPwk3SXj9BKf1WqEHfyKILvXQtZ3VKqyniZTOLr3hOa5/rzbI6Q== X-Received: by 2002:a63:9c7:: with SMTP id 190mr10210076pgj.149.1621242592174; Mon, 17 May 2021 02:09:52 -0700 (PDT) Received: from localhost ([139.177.225.253]) by smtp.gmail.com with ESMTPSA id 6sm9661465pjm.21.2021.05.17.02.09.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 May 2021 02:09:51 -0700 (PDT) From: Xie Yongji To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com Cc: amit@kernel.org, arei.gonglei@huawei.com, airlied@linux.ie, kraxel@redhat.com, dan.j.williams@intel.com, johannes@sipsolutions.net, ohad@wizery.com, bjorn.andersson@linaro.org, david@redhat.com, vgoyal@redhat.com, miklos@szeredi.hu, sgarzare@redhat.com, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 14/17] virtio_mem: Remove unused used length Date: Mon, 17 May 2021 17:08:33 +0800 Message-Id: <20210517090836.533-15-xieyongji@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210517090836.533-1-xieyongji@bytedance.com> References: <20210517090836.533-1-xieyongji@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The used length is not used. Let's drop it and pass NULL to virtqueue_get_buf() instead. Signed-off-by: Xie Yongji --- drivers/virtio/virtio_mem.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c index 10ec60d81e84..32a8e359a5c3 100644 --- a/drivers/virtio/virtio_mem.c +++ b/drivers/virtio/virtio_mem.c @@ -1256,7 +1256,6 @@ static uint64_t virtio_mem_send_request(struct virtio_mem *vm, const struct virtio_mem_req *req) { struct scatterlist *sgs[2], sg_req, sg_resp; - unsigned int len; int rc; /* don't use the request residing on the stack (vaddr) */ @@ -1277,7 +1276,7 @@ static uint64_t virtio_mem_send_request(struct virtio_mem *vm, virtqueue_kick(vm->vq); /* wait for a response */ - wait_event(vm->host_resp, virtqueue_get_buf(vm->vq, &len)); + wait_event(vm->host_resp, virtqueue_get_buf(vm->vq, NULL)); return virtio16_to_cpu(vm->vdev, vm->resp.type); } -- 2.11.0