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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CB133CA0EFC for ; Fri, 22 Aug 2025 00:43:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=V0VpZa3wyz806HjrDXxWUg4wqKW4gmgEyCsYsVYfaFU=; b=gb3jmL13ZxVE3K ZD0n/+igdbIT7DimtubI2wWMb76iwF//48Jpzfs/ffjNXxmguZ5MjYMpkqLrDNo5cNu/myipXA1+c qJKq838gO8s2Rdxfx6n6bI1qw8EGYmF5LfEvFG3q+txLNuJGJaQy/EvzfM/Lna637XPi/Ajez2Cml st5zIZggMx12kGOi4xVfT0zOJ3OD6V27jXMr5Rk8sqAaTapRGOHPCi0Pi2Zu0PLF0i5nzR9V6WB59 TiT/W7O4wxHYNhBKX6fklAoCG+Ds0c+eZkd4endacTCntipFmIn8QXNlAtv/5gCtrOjf+5SWtDgYp cMIl748l3RtCdKEnEQjg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1upFs6-000000013tD-3SF5; Fri, 22 Aug 2025 00:43:10 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1upBa5-00000000NvT-3Qbw for linux-riscv@bombadil.infradead.org; Thu, 21 Aug 2025 20:08:17 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=content-type:Content-Transfer-Encoding :MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Sender:Reply-To:Content-ID:Content-Description; bh=Pq6EMCEhMXNA7HGNe/O1qYHWHhWZrBzRdRZ7YmKumJw=; b=MchWWv+zJfBR6BH2/v+pt6kip3 2YdWVIM9WkWGpSBb3/53zyx8mjL/lWWTDP1ddxM3Ew2DfXCLKDVH0UBY4kVCJvQYo+QYLqA/KjZfC yuOa+x6NimpE1sL5IRdLXt6aQ6K5T7ioJlwhdUYD3Yb4IsH5MOKbScWmS/3WnNcV2jbt2OZPvz2Mi RKn1PIwCAn0yaxgxPNYuF03LE2h2Tfkg1X3WuNTGlw3njS5CNoLlfC/FJolpC/oYypzySKgOJgW/h mSYOgI/o9AOCnOUUU6AfNAfdw+u9kPW0/bX8XAK3Od04WZOYCdt8lsKPWXBjw+TVFTpA9F7igBdGw cIlddI/Q==; Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by desiato.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1upBa2-00000000eyd-0pSx for linux-riscv@lists.infradead.org; Thu, 21 Aug 2025 20:08:16 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1755806891; 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=Pq6EMCEhMXNA7HGNe/O1qYHWHhWZrBzRdRZ7YmKumJw=; b=LAuI4ObQ8SK/1nK29SQ4IEJeO17n4p53HUvNerNItBLRh4TlQsyAA9PyGpyeoH4NcTxHAC K9wlfm/6fKZWSTr5BDOHiWmzKPrxGtCJGsVIzgrSK99KJpkRgbq1zSw17F/AJhaUnXB3gq wsmylcATFHCNgNF9PJ5A09LoNOxU+2g= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1755806892; 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=Pq6EMCEhMXNA7HGNe/O1qYHWHhWZrBzRdRZ7YmKumJw=; b=NBJmhThnt6QbKPOfznR1lvSLbOABO9jQHu5pR/CiWkhRPjNrz/CfBRjALP8g7oooiOhYK8 og9L4oRrCMh59Mh67ndkn6Kt2oc61vVKZToL51BCIrP4zkrOly24SPJS43itQJEvJBc06L XmGGH5nOZn7fTX2lW6la78mA9iWXpFo= Received: from mail-wr1-f70.google.com (mail-wr1-f70.google.com [209.85.221.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-532-PK2xyYzdOD6eO-7vmEQg5Q-1; Thu, 21 Aug 2025 16:08:10 -0400 X-MC-Unique: PK2xyYzdOD6eO-7vmEQg5Q-1 X-Mimecast-MFC-AGG-ID: PK2xyYzdOD6eO-7vmEQg5Q_1755806889 Received: by mail-wr1-f70.google.com with SMTP id ffacd0b85a97d-3b9d41b88ffso838248f8f.0 for ; Thu, 21 Aug 2025 13:08:10 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755806889; x=1756411689; 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=Pq6EMCEhMXNA7HGNe/O1qYHWHhWZrBzRdRZ7YmKumJw=; b=uvmKPzFXf9YloAgYigXrE3kpX0NNWfkq/QNUpi6b/cNy6eur7jTn6tiRr+jXHAN4+2 uPpraHJXdxRptZ6VfmnBs/NYwEx6u8wxBIXbYcWRShSy3CIP548xm7OM2O8UfdsLg+sA g1vRKavocvurweQ3RIDWK1B/2AVd1DL32hdIBZAkGCpL1hbiTDaD2Z6XLm9cagP7v+RS +Tow5hhj6dALlPOe8B7syb37jQdQokFj6OJC38jye3GFKSLzdK03AzTKEERjA8O57JAC 9Fgt0PWZBrXy5q0Z2dalsGuDEX6vz9e+hnWkQVd5IcClo1fPCyxaPxdQMWyj/tlzhRB5 6K6A== X-Forwarded-Encrypted: i=1; AJvYcCUIzFMcJIkNKiV9xl4s6/jzIFMXr+vSSSPm+Xz9dUjhJTHZxIZJd+maQYhknsLcbECT2jmXsVWrSVH/nw==@lists.infradead.org X-Gm-Message-State: AOJu0YxgkGzygHNnus3iIIzgatiUxC+MI/H8a1uxNmGJ8e+ClZFQFXcv RbrTR/TDssjnXe0RXivF4sMfC1R0g0XUszFZBdFN6Zpvad6Zqgq4aeWRT8IB8xhBzDpx5rzCmo7 hIA2u/w8A+An1UyxwzXnoFv2SJygNNfaj4oECPJAUY52A1YAur1IIehtSVAn/CVi4ZG3lfQ== X-Gm-Gg: ASbGncsF9fadRO17SD8exg8ieoOqHenaWGNqqzvsc9HW0OqTJg6W+xwQowtNqzforXQ JUA8sSPnrj49poo2TY+ov2AqnJIszOXzxP9zWl6gC62xDTB9E7Q+c/K21JCmRADxFmDl3a5QA+1 xv2NvirxxtO/rOrG/OeXeh5NuV5qeAYlRQNXgmYJ2uUthR5oU5L3uePFxgRJmq3RvkeJKVhk8fr w//DS27VFkbWvhAC6qbwXfzpwLvOdRTQpP5iN7PrXIaKuHgmMu+VIySBwQV78FZQbNik6teu3gu WEw+EhansrUhgcnrD+Q+I25EdeTwLo6xFmAAsGA8ojWUKWWINboJ+/WIyXVJ4EdbRkgI4CFNsEZ jmHlGpFHwSgAdRM+rhq45hQ== X-Received: by 2002:a05:6000:40c9:b0:3b7:911c:83f with SMTP id ffacd0b85a97d-3c5da83bf5bmr151960f8f.9.1755806888899; Thu, 21 Aug 2025 13:08:08 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGeHEkncn914iQLB6IDJFbFllUgyuseH1VcCPvg+Bdgchh7CcvmYDhAXktPsYS0hqHcr6hQuQ== X-Received: by 2002:a05:6000:40c9:b0:3b7:911c:83f with SMTP id ffacd0b85a97d-3c5da83bf5bmr151916f8f.9.1755806888456; Thu, 21 Aug 2025 13:08:08 -0700 (PDT) Received: from localhost (p200300d82f26ba0008036ec5991806fd.dip0.t-ipconnect.de. [2003:d8:2f26:ba00:803:6ec5:9918:6fd]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-45b4e2790a8sm21120815e9.1.2025.08.21.13.08.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 21 Aug 2025 13:08:07 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: David Hildenbrand , Marek Szyprowski , Robin Murphy , Alexander Potapenko , Andrew Morton , Brendan Jackman , Christoph Lameter , Dennis Zhou , Dmitry Vyukov , dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, iommu@lists.linux.dev, io-uring@vger.kernel.org, Jason Gunthorpe , Jens Axboe , Johannes Weiner , John Hubbard , kasan-dev@googlegroups.com, kvm@vger.kernel.org, "Liam R. Howlett" , Linus Torvalds , linux-arm-kernel@axis.com, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ide@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mips@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, Lorenzo Stoakes , Marco Elver , Michal Hocko , Mike Rapoport , Muchun Song , netdev@vger.kernel.org, Oscar Salvador , Peter Xu , Suren Baghdasaryan , Tejun Heo , virtualization@lists.linux.dev, Vlastimil Babka , wireguard@lists.zx2c4.com, x86@kernel.org, Zi Yan Subject: [PATCH RFC 22/35] dma-remap: drop nth_page() in dma_common_contiguous_remap() Date: Thu, 21 Aug 2025 22:06:48 +0200 Message-ID: <20250821200701.1329277-23-david@redhat.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250821200701.1329277-1-david@redhat.com> References: <20250821200701.1329277-1-david@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: oM8i5BiiJWuETSW2_DXNTGBK-2aEprRnu2943FMXQ4A_1755806889 X-Mimecast-Originator: redhat.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250821_210814_644320_3C16BB41 X-CRM114-Status: GOOD ( 12.54 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org dma_common_contiguous_remap() is used to remap an "allocated contiguous region". Within a single allocation, there is no need to use nth_page() anymore. Neither the buddy, nor hugetlb, nor CMA will hand out problematic page ranges. Cc: Marek Szyprowski Cc: Robin Murphy Signed-off-by: David Hildenbrand --- kernel/dma/remap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/dma/remap.c b/kernel/dma/remap.c index 9e2afad1c6152..b7c1c0c92d0c8 100644 --- a/kernel/dma/remap.c +++ b/kernel/dma/remap.c @@ -49,7 +49,7 @@ void *dma_common_contiguous_remap(struct page *page, size_t size, if (!pages) return NULL; for (i = 0; i < count; i++) - pages[i] = nth_page(page, i); + pages[i] = page++; vaddr = vmap(pages, count, VM_DMA_COHERENT, prot); kvfree(pages); -- 2.50.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv