From patchwork Fri Mar 22 16:58:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Dan Williams X-Patchwork-Id: 10866299 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 611BE922 for ; Fri, 22 Mar 2019 17:10:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 468C22A88F for ; Fri, 22 Mar 2019 17:10:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3AB332A8B6; Fri, 22 Mar 2019 17:10:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A37EF2A8C2 for ; Fri, 22 Mar 2019 17:10:46 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 8F965211E8308; Fri, 22 Mar 2019 10:10:46 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=192.55.52.151; helo=mga17.intel.com; envelope-from=dan.j.williams@intel.com; receiver=linux-nvdimm@lists.01.org Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id C7FDC211E82F7 for ; Fri, 22 Mar 2019 10:10:44 -0700 (PDT) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 22 Mar 2019 10:10:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,256,1549958400"; d="scan'208";a="216629502" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.16]) by orsmga001.jf.intel.com with ESMTP; 22 Mar 2019 10:10:43 -0700 Subject: [PATCH v5 02/10] mm/sparsemem: Introduce common definitions for the size and mask of a section From: Dan Williams To: akpm@linux-foundation.org Date: Fri, 22 Mar 2019 09:58:05 -0700 Message-ID: <155327388517.225273.8517440825117584932.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <155327387405.225273.9325594075351253804.stgit@dwillia2-desk3.amr.corp.intel.com> References: <155327387405.225273.9325594075351253804.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.18-2-gc94f MIME-Version: 1.0 X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michal Hocko , linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, =?utf-8?b?SsOpcsO0bWU=?= Glisse , Vlastimil Babka Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP Up-level the local section size and mask from kernel/memremap.c to global definitions. These will be used by the new sub-section hotplug support. Cc: Michal Hocko Cc: Vlastimil Babka Cc: Jérôme Glisse Cc: Logan Gunthorpe Signed-off-by: Dan Williams --- include/linux/mmzone.h | 2 ++ kernel/memremap.c | 10 ++++------ mm/hmm.c | 2 -- 3 files changed, 6 insertions(+), 8 deletions(-) diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 151dd7327e0b..69b9cb9cb2ed 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -1081,6 +1081,8 @@ static inline unsigned long early_pfn_to_nid(unsigned long pfn) * PFN_SECTION_SHIFT pfn to/from section number */ #define PA_SECTION_SHIFT (SECTION_SIZE_BITS) +#define PA_SECTION_SIZE (1UL << PA_SECTION_SHIFT) +#define PA_SECTION_MASK (~(PA_SECTION_SIZE-1)) #define PFN_SECTION_SHIFT (SECTION_SIZE_BITS - PAGE_SHIFT) #define NR_MEM_SECTIONS (1UL << SECTIONS_SHIFT) diff --git a/kernel/memremap.c b/kernel/memremap.c index a856cb5ff192..dda1367b385d 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -14,8 +14,6 @@ #include static DEFINE_XARRAY(pgmap_array); -#define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1) -#define SECTION_SIZE (1UL << PA_SECTION_SHIFT) #if IS_ENABLED(CONFIG_DEVICE_PRIVATE) vm_fault_t device_private_entry_fault(struct vm_area_struct *vma, @@ -98,8 +96,8 @@ static void devm_memremap_pages_release(void *data) put_page(pfn_to_page(pfn)); /* pages are dead and unused, undo the arch mapping */ - align_start = res->start & ~(SECTION_SIZE - 1); - align_size = ALIGN(res->start + resource_size(res), SECTION_SIZE) + align_start = res->start & ~(PA_SECTION_SIZE - 1); + align_size = ALIGN(res->start + resource_size(res), PA_SECTION_SIZE) - align_start; nid = page_to_nid(pfn_to_page(align_start >> PAGE_SHIFT)); @@ -154,8 +152,8 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap) if (!pgmap->ref || !pgmap->kill) return ERR_PTR(-EINVAL); - align_start = res->start & ~(SECTION_SIZE - 1); - align_size = ALIGN(res->start + resource_size(res), SECTION_SIZE) + align_start = res->start & ~(PA_SECTION_SIZE - 1); + align_size = ALIGN(res->start + resource_size(res), PA_SECTION_SIZE) - align_start; align_end = align_start + align_size - 1; diff --git a/mm/hmm.c b/mm/hmm.c index fe1cd87e49ac..ef9e4e6c9f92 100644 --- a/mm/hmm.c +++ b/mm/hmm.c @@ -33,8 +33,6 @@ #include #include -#define PA_SECTION_SIZE (1UL << PA_SECTION_SHIFT) - #if IS_ENABLED(CONFIG_HMM_MIRROR) static const struct mmu_notifier_ops hmm_mmu_notifier_ops;