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=-3.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=no 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 CCF79C43331 for ; Thu, 2 Apr 2020 04:09:06 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 80508206E9 for ; Thu, 2 Apr 2020 04:09:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="iKLdsB6Q" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 80508206E9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 28FCE8E0066; Thu, 2 Apr 2020 00:09:06 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 21D878E000D; Thu, 2 Apr 2020 00:09:06 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 10C278E0066; Thu, 2 Apr 2020 00:09:06 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0198.hostedemail.com [216.40.44.198]) by kanga.kvack.org (Postfix) with ESMTP id E951B8E000D for ; Thu, 2 Apr 2020 00:09:05 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id B16634DA1 for ; Thu, 2 Apr 2020 04:09:05 +0000 (UTC) X-FDA: 76661584650.21.kiss43_4f60cc9359d0a X-HE-Tag: kiss43_4f60cc9359d0a X-Filterd-Recvd-Size: 2469 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf22.hostedemail.com (Postfix) with ESMTP for ; Thu, 2 Apr 2020 04:09:05 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7B5562074D; Thu, 2 Apr 2020 04:09:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585800544; bh=rWDcPqVCEzLZuDfI9SnthcNkV9sK1ZKmAG/B8c7vO/w=; h=Date:From:To:Subject:In-Reply-To:From; b=iKLdsB6QXFW0TjLlVUqUj1fSf7dYMb45oLMo6xSixiC0FcZWOatn4vP33X+O2vsI+ lpErAQ6R6mxcitye1stKN2a0gKVN1e4xZwsp9F2orOKhKvuDjIS6m/A7pJzQKMMo// k1LevRlAnK9+lWeChE9kAsO3UgmqQZ8xljjIFIF8= Date: Wed, 01 Apr 2020 21:09:03 -0700 From: Andrew Morton To: akpm@linux-foundation.org, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, wenhu.wang@vivo.com Subject: [patch 102/155] mm: clarify a confusing comment for remap_pfn_range() Message-ID: <20200402040903.y3mjI6PGf%akpm@linux-foundation.org> In-Reply-To: <20200401210155.09e3b9742e1c6e732f5a7250@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: WANG Wenhu Subject: mm: clarify a confusing comment for remap_pfn_range() It really made me scratch my head. Replace the comment with an accurate and consistent description. The parameter pfn actually refers to the page frame number which is right-shifted by PAGE_SHIFT from the physical address. Link: http://lkml.kernel.org/r/20200310073955.43415-1-wenhu.wang@vivo.com Signed-off-by: WANG Wenhu Reviewed-by: Andrew Morton Signed-off-by: Andrew Morton --- mm/memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/memory.c~mm-clarify-a-confusing-comment-of-remap_pfn_range +++ a/mm/memory.c @@ -1939,7 +1939,7 @@ static inline int remap_p4d_range(struct * remap_pfn_range - remap kernel memory to userspace * @vma: user vma to map to * @addr: target user address to start at - * @pfn: physical address of kernel memory + * @pfn: page frame number of kernel physical memory address * @size: size of map area * @prot: page protection flags for this mapping * _