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=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 8E550C46466 for ; Sat, 3 Oct 2020 02:55:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5177A206FA for ; Sat, 3 Oct 2020 02:55:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="ned4PYyH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725880AbgJCCzn (ORCPT ); Fri, 2 Oct 2020 22:55:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57036 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725869AbgJCCzl (ORCPT ); Fri, 2 Oct 2020 22:55:41 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 20EE2C0613E6 for ; Fri, 2 Oct 2020 19:55:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=r+DrRNf/YvIlg8iiF7HHU8Cai8iu71aY/7FqVYN0BRM=; b=ned4PYyHjgF+26+mwwxw1aHiuq QDuuCsBJl3rUyaIrWB/NWyRy9JxWSnCxc95D917cqlwNWEcsvhC9sWtaP8c9PAxAHRDUbHzvQMSAN aVfrBSI5sWYi35Yfb6C0T0C7zDplNQ2RidvUoKz/f/4Cs2XU1aJHvlsb4+pv614lK8CI+pQvE129G 61lHaGVcGQwc2Bm/Sb/ImapC1VZhN/uJB5aAlhgmlM+4Bre9gwCksmnPPxNmJ5/xEpNQTXd5hV5YV UW3BhRiO7Ru6JEminQrcQniJaRe4iHyNmjTiJvQDSi3cGGc0JFxVHQkW5LIZ8O2/KuEcvLHjLMCyi Kdj35ZNg==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kOXhx-0005VZ-SO; Sat, 03 Oct 2020 02:55:37 +0000 From: "Matthew Wilcox (Oracle)" To: Al Viro Cc: "Matthew Wilcox (Oracle)" , Christoph Hellwig , linux-fsdevel@vger.kernel.org Subject: [PATCH 09/13] bpfilter: Pass a NULL pointer to kernel_read and kernel_write Date: Sat, 3 Oct 2020 03:55:30 +0100 Message-Id: <20201003025534.21045-10-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20201003025534.21045-1-willy@infradead.org> References: <20201003025534.21045-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org We want to start at 0 and do not care about the updated value. Signed-off-by: Matthew Wilcox (Oracle) --- net/bpfilter/bpfilter_kern.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/net/bpfilter/bpfilter_kern.c b/net/bpfilter/bpfilter_kern.c index 51a941b56ec3..bca294c9253f 100644 --- a/net/bpfilter/bpfilter_kern.c +++ b/net/bpfilter/bpfilter_kern.c @@ -34,21 +34,18 @@ static void __stop_umh(void) static int bpfilter_send_req(struct mbox_request *req) { struct mbox_reply reply; - loff_t pos = 0; ssize_t n; if (!bpfilter_ops.info.tgid) return -EFAULT; - pos = 0; n = kernel_write(bpfilter_ops.info.pipe_to_umh, req, sizeof(*req), - &pos); + NULL); if (n != sizeof(*req)) { pr_err("write fail %zd\n", n); goto stop; } - pos = 0; n = kernel_read(bpfilter_ops.info.pipe_from_umh, &reply, sizeof(reply), - &pos); + NULL); if (n != sizeof(reply)) { pr_err("read fail %zd\n", n); goto stop; -- 2.28.0