From patchwork Tue Mar 28 21:58:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Axboe X-Patchwork-Id: 13191598 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6CF77C761A6 for ; Tue, 28 Mar 2023 21:58:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230072AbjC1V6j (ORCPT ); Tue, 28 Mar 2023 17:58:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55550 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230058AbjC1V60 (ORCPT ); Tue, 28 Mar 2023 17:58:26 -0400 Received: from mail-pl1-x631.google.com (mail-pl1-x631.google.com [IPv6:2607:f8b0:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0F2A210CC for ; Tue, 28 Mar 2023 14:58:25 -0700 (PDT) Received: by mail-pl1-x631.google.com with SMTP id iw3so13057077plb.6 for ; Tue, 28 Mar 2023 14:58:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20210112.gappssmtp.com; s=20210112; t=1680040704; x=1682632704; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=oNiZElylqd4oRsTQgc5WV3Ag1/Bvc2tTEOYDdozkUio=; b=iEgLbG9r6XFXfGtaFXYy7mZRK4UqzdhYqC84CtABUu5KKp3+efJcbGIAJ1/LAf0hob tkYdnCYJrC5UcutiQ3Km4pyRNp/llUDC53N0dc4/jsCC/Tpq+tTaaRqTvOWb2d5gTaLS 4h4cCxuvtVnNRV7ezypeBWbXyZgVkw+YFDb+bPgMGrbUovySXMoNbqVAmPkPyu+iwyRg 8SP6JoLCEOPdTFKWUzOUXK3EXY1SgYayGpfptiz4jhQ7yhh4i6ciDS0lfGEhbVvWfgQv 8FpAAwJPrdqgaJ4ZR8fM7r8sBCKviktOcUGFHpbQoPn8EDCCCLeZKiQU33RkhyWsha0O 6NIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680040704; x=1682632704; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=oNiZElylqd4oRsTQgc5WV3Ag1/Bvc2tTEOYDdozkUio=; b=wudn5dypM4SlADKco1ifJMiBvBG6AeBaaGMYbqE4QsTHQ0ZfY/vH0dFvZwTV1a2w8L a8wQL69BtVqVCBilD88VDVdxAVjDDL25xEMUtWFVtF6dwyBK3VDYlaTu3QvsnUwe6K5N tBdYbxsxtdznZnertRzfDpACkAcwDSrNbr2PzYMwYMMCPhgi3MBC2yq5wslOG3YjVhmN bEsPbHW+EqBb20rhKuLB9IOX/aXm8bjNnIjDlzBuUOqsmtFTAO9PT1kaBfHjbmVqB2R1 OAzlnifvjBiHVD2Z7n7ljyudrsHcr1iUfa455gaE2oW5ewQAnlGco/vKDGDfONXnBiWa R11w== X-Gm-Message-State: AAQBX9fTkjAXKaJr2onoJZ0D+LK/mG3xste4daRW9qOAhdXY7ibc7jcF OU9Zo5JTKuiXwiytY6DUTtLSL3kLxx9VL5O4FG+R6Q== X-Google-Smtp-Source: AKy350aBZmSxVCYzTJ87/4lMPgOjJSn67tUb/ixJ/7DpMtLCk4TXH9KmIYAMrrF9JHYn/MfDrF0xwg== X-Received: by 2002:a17:902:f943:b0:19a:839d:b67a with SMTP id kx3-20020a170902f94300b0019a839db67amr14620207plb.5.1680040704275; Tue, 28 Mar 2023 14:58:24 -0700 (PDT) Received: from localhost.localdomain ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id t20-20020a1709028c9400b001a04b92ddffsm21560171plo.140.2023.03.28.14.58.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Mar 2023 14:58:23 -0700 (PDT) From: Jens Axboe To: linux-fsdevel@vger.kernel.org Cc: torvalds@linux-foundation.org, brauner@kernel.org, viro@zeniv.linux.org.uk, Jens Axboe Subject: [PATCH 8/9] iov_iter: convert import_single_range() to ITER_UBUF Date: Tue, 28 Mar 2023 15:58:10 -0600 Message-Id: <20230328215811.903557-9-axboe@kernel.dk> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230328215811.903557-1-axboe@kernel.dk> References: <20230328215811.903557-1-axboe@kernel.dk> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Since we're just importing a single vector, we don't have to turn it into an ITER_IOVEC. Instead turn it into an ITER_UBUF, which is cheaper to iterate. Signed-off-by: Jens Axboe --- lib/iov_iter.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 274014e4eafe..fc82cc42ffe6 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -1866,9 +1866,7 @@ int import_single_range(int rw, void __user *buf, size_t len, if (unlikely(!access_ok(buf, len))) return -EFAULT; - iov->iov_base = buf; - iov->iov_len = len; - iov_iter_init(i, rw, iov, 1, len); + iov_iter_ubuf(i, rw, buf, len); return 0; } EXPORT_SYMBOL(import_single_range);