From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D435736CC6A for ; Thu, 21 Aug 2025 20:08:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755806894; cv=none; b=omYt/1FNZWSsudbMUqmyPu0K04YPjvO3hgdDrXPp92h+AeJ86PJQwsXGiFn3cDNTYo3qPFxHwiLHufWZ2ZWnBQ9dvYBufH1aY+uj+SuqkpKxHUlcWHDtV+Ws3iiRfbhSiaQWdHGBr+CXtQrYBpg89sMWN/X9Frzu54GLFvalJ7s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755806894; c=relaxed/simple; bh=35i5s1BcLEONuxohRPeqiFHOreLIpfTF289+ZIXZu/s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=q0Tw0eKOwZ4vcEw7/bapGVEhxMboptOV4mS+jGGUK2uZWzwRRREE9xj5DLd9BHB+YhvRLoqvOIs3hBdhmLef7ogPDFHimbOmJm6Hysp8TGXIz4I2JVJPbKMDTmgUJn9Xm3e04ItH349ZCJrQL50+8Jcfp0+gLzeqXpKbVX+UfIg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=iy3wgKBi; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="iy3wgKBi" 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-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Pq6EMCEhMXNA7HGNe/O1qYHWHhWZrBzRdRZ7YmKumJw=; b=iy3wgKBi03EyZ3sRdRWSgr84psZuJtpBypQHP7law3eYFY+FVr08x31c3sGqpwjxqAGmTX xqBGUqiu8RyAPg93w1dvnEzol1HjwjQI/m6o382BgrH/D7lRFhyqnnqDsexkYq33pFBhbr yj7lMaG4r48RcxYaH/qGbQzbdKtKz3w= Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-530-oJgCGMqQP_K9ZruOdbr38g-1; Thu, 21 Aug 2025 16:08:10 -0400 X-MC-Unique: oJgCGMqQP_K9ZruOdbr38g-1 X-Mimecast-MFC-AGG-ID: oJgCGMqQP_K9ZruOdbr38g_1755806889 Received: by mail-wr1-f69.google.com with SMTP id ffacd0b85a97d-3b9e4f039ecso759576f8f.2 for ; Thu, 21 Aug 2025 13:08:09 -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=UgFd9xppJItIUrpQQbPYmul6E8zSlPGLL9M9RMhcWO7nMwLbhiy1Z9XhR5rq6PgbGJ NW2Q6oJjF+xY3xxY9JmVwgX9onko0z6nGTc+VvmZM+IzEkj21z3BsKynOqSALRna3bHL OGAVrE2iAqRGjgAlagkmjSrEw/vo42zHwZp/HYONHIVOlKCbgCCFsmrJSJlj4tLBRF/Z bAbVGwfgB2nVXNnXdRDpKKPF20LV11cJuFzW44e4n7qbRquzoyfwtVMxyXX1njrf9xIc JZjSW5UaUw2IBDZFojcK2Vu/1m7pGpmHJ4Ll5TcbiSYi8fBlRMLOEDn84dktNnq63EyW xWTw== X-Forwarded-Encrypted: i=1; AJvYcCWHSBlh2d1YZAb9dPT+DqO8l6+v+spCrBnf8UC9FgmDwEooqzhksa1QPNm10Eucj25s9JmGmq0=@vger.kernel.org X-Gm-Message-State: AOJu0YydJEezEOtNqKR4kX8Qd9nNOkSUcYtUJ1RegLZX5bO+roPp9xco 23oasiEoDRcvd75bzfNoDjYHQZ2/8uTU45Dm3ZfXAmirYeCa1VWJHRBdH7bWt5tmpcs+bTDdone lql2fMNm6xEbbLrnHqdRLzp6zWhrGGwI762w2XG4x4JbE0zRNh07bWIoBZw== X-Gm-Gg: ASbGnculz0h43dOsekk7lg0RnPWi6dMRodgnreKXT3252bJr7ZPR9JGxAvPpuNh2xI1 RMs6YN4PDNbVE0nkqva43NEF+XOa1Bl/qTxk1SHDQsAA5bcF4nDJdF3TkELer2nBMa4LlYu7E1+ aCyoWnebTKERC8uJfAbQflzbmAi96b4rVoGR+9pG4RFinixY2keIgxCSUoS3QJBn+9HkGkp/Pl2 UzNHNslu42LESfLV2fzJvif947yx0MM9UPKEbc8UNXC3gvb49ahe9u/uOx82AWEnCtdV935GdK0 ziWW1mF2I43qENEZEzqb1KKWBGlinHzEIVZFo2qG1AmY+ex6ncjV9PpsZ00V8vEci5wSfzTVsmf Iz4JzChw7J6ZJ+LaD7M5IVg== X-Received: by 2002:a05:6000:40c9:b0:3b7:911c:83f with SMTP id ffacd0b85a97d-3c5da83bf5bmr151945f8f.9.1755806888889; 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> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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