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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 F0FC8C43381 for ; Fri, 29 Mar 2019 15:40:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BF4512075E for ; Fri, 29 Mar 2019 15:40:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729684AbfC2PkQ (ORCPT ); Fri, 29 Mar 2019 11:40:16 -0400 Received: from mga12.intel.com ([192.55.52.136]:55983 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728956AbfC2PkO (ORCPT ); Fri, 29 Mar 2019 11:40:14 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Mar 2019 08:40:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,284,1549958400"; d="scan'208";a="287036931" Received: from dwillia2-desk3.jf.intel.com (HELO dwillia2-desk3.amr.corp.intel.com) ([10.54.39.16]) by orsmga004.jf.intel.com with ESMTP; 29 Mar 2019 08:40:13 -0700 Subject: [PATCH 2/6] mm/devm_memremap_pages: Introduce devm_memunmap_pages From: Dan Williams To: akpm@linux-foundation.org Cc: Logan Gunthorpe , Ira Weiny , Bjorn Helgaas , Christoph Hellwig , linux-mm@kvack.org, linux-pci@vger.kernel.org, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org Date: Fri, 29 Mar 2019 08:27:34 -0700 Message-ID: <155387325416.2443841.6074930471073650165.stgit@dwillia2-desk3.amr.corp.intel.com> In-Reply-To: <155387324370.2443841.574715745262628837.stgit@dwillia2-desk3.amr.corp.intel.com> References: <155387324370.2443841.574715745262628837.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: StGit/0.18-2-gc94f MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use the new devm_relase_action() facility to allow devm_memremap_pages_release() to be manually triggered. Cc: Logan Gunthorpe Cc: Ira Weiny Cc: Bjorn Helgaas Cc: Christoph Hellwig Signed-off-by: Dan Williams --- include/linux/memremap.h | 6 ++++++ kernel/memremap.c | 6 ++++++ 2 files changed, 12 insertions(+) diff --git a/include/linux/memremap.h b/include/linux/memremap.h index f0628660d541..7601ee314c4a 100644 --- a/include/linux/memremap.h +++ b/include/linux/memremap.h @@ -100,6 +100,7 @@ struct dev_pagemap { #ifdef CONFIG_ZONE_DEVICE void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap); +void devm_memunmap_pages(struct device *dev, struct dev_pagemap *pgmap); struct dev_pagemap *get_dev_pagemap(unsigned long pfn, struct dev_pagemap *pgmap); @@ -118,6 +119,11 @@ static inline void *devm_memremap_pages(struct device *dev, return ERR_PTR(-ENXIO); } +static inline void devm_memunmap_pages(struct device *dev, + struct dev_pagemap *pgmap) +{ +} + static inline struct dev_pagemap *get_dev_pagemap(unsigned long pfn, struct dev_pagemap *pgmap) { diff --git a/kernel/memremap.c b/kernel/memremap.c index a856cb5ff192..65afbacab44e 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -266,6 +266,12 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap) } EXPORT_SYMBOL_GPL(devm_memremap_pages); +void devm_memunmap_pages(struct device *dev, struct dev_pagemap *pgmap) +{ + devm_release_action(dev, devm_memremap_pages_release, pgmap); +} +EXPORT_SYMBOL_GPL(devm_memunmap_pages); + unsigned long vmem_altmap_offset(struct vmem_altmap *altmap) { /* number of pfns from base where pfn_to_page() is valid */