From patchwork Thu Oct 22 23:20:43 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kani, Toshi" X-Patchwork-Id: 7468351 Return-Path: X-Original-To: patchwork-linux-nvdimm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D83EC9F302 for ; Thu, 22 Oct 2015 23:24:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0E784206DF for ; Thu, 22 Oct 2015 23:24:39 +0000 (UTC) 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.kernel.org (Postfix) with ESMTPS id 2BE862070F for ; Thu, 22 Oct 2015 23:24:37 +0000 (UTC) Received: from ml01.vlan14.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id BBEC96095C; Thu, 22 Oct 2015 16:24:36 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received: from g1t6220.austin.hp.com (g1t6220.austin.hp.com [15.73.96.84]) (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 9487660934 for ; Thu, 22 Oct 2015 16:24:35 -0700 (PDT) Received: from g2t4689.austin.hpicorp.net (g2t4689.austin.hpicorp.net [15.94.10.175]) by g1t6220.austin.hp.com (Postfix) with ESMTP id 96A33BD; Thu, 22 Oct 2015 23:24:34 +0000 (UTC) Received: from misato.fc.hp.com (misato.fc.hp.com [16.78.168.61]) by g2t4689.austin.hpicorp.net (Postfix) with ESMTP id E85D93B; Thu, 22 Oct 2015 23:24:33 +0000 (UTC) From: Toshi Kani To: akpm@linux-foundation.org, dan.j.williams@intel.com, rjw@rjwysocki.net Subject: [PATCH 2/3] resource: Add region_intersects_pmem() Date: Thu, 22 Oct 2015 17:20:43 -0600 Message-Id: <1445556044-30322-3-git-send-email-toshi.kani@hpe.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1445556044-30322-1-git-send-email-toshi.kani@hpe.com> References: <1445556044-30322-1-git-send-email-toshi.kani@hpe.com> Cc: linux-mm@kvack.org, Toshi Kani , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add region_intersects_pmem(), which checks if a specified address range is persistent memory registered as "Persistent Memory" in the iomem_resource list. Note, it does not support legacy persistent memory registered as "Persistent Memory (legacy)". It can be supported by extending this function or a separate function, if necessary. This interface is exported so that it can be called from modules, such as the EINJ driver. Signed-off-by: Toshi Kani --- include/linux/mm.h | 1 + kernel/resource.c | 12 ++++++++++++ 2 files changed, 13 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 699224e..ae1790f 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -361,6 +361,7 @@ enum { int region_intersects(resource_size_t offset, size_t size, const char *type, unsigned long flags); int region_intersects_ram(resource_size_t offset, size_t size); +int region_intersects_pmem(resource_size_t offset, size_t size); /* Support for virtually mapped pages */ struct page *vmalloc_to_page(const void *addr); diff --git a/kernel/resource.c b/kernel/resource.c index 8a77ed8..b6b61a1 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -547,6 +547,18 @@ int region_intersects_ram(resource_size_t start, size_t size) IORESOURCE_MEM | IORESOURCE_BUSY); } +/* + * region_intersects_pmem() checks if a specified address range is + * persistent memory, registered as "Persistent Memory", in the + * iomem_resource list. + */ +int region_intersects_pmem(resource_size_t start, size_t size) +{ + return region_intersects(start, size, "Persistent Memory", + IORESOURCE_MEM); +} +EXPORT_SYMBOL_GPL(region_intersects_pmem); + void __weak arch_remove_reservations(struct resource *avail) { }