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=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 7D191C433E3 for ; Wed, 29 Jul 2020 03:35:32 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5B08E2075F for ; Wed, 29 Jul 2020 03:35:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5B08E2075F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 334C111460B21; Tue, 28 Jul 2020 20:35:32 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=justin.he@arm.com; receiver= Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by ml01.01.org (Postfix) with ESMTP id 060AF11001AB9 for ; Tue, 28 Jul 2020 20:35:28 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 22CD631B; Tue, 28 Jul 2020 20:35:28 -0700 (PDT) Received: from localhost.localdomain (entos-thunderx2-02.shanghai.arm.com [10.169.212.213]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id A76983F66E; Tue, 28 Jul 2020 20:35:20 -0700 (PDT) From: Jia He To: Dan Williams , Vishal Verma , Mike Rapoport , David Hildenbrand Subject: [RFC PATCH 2/6] resource: export find_next_iomem_res() helper Date: Wed, 29 Jul 2020 11:34:20 +0800 Message-Id: <20200729033424.2629-3-justin.he@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200729033424.2629-1-justin.he@arm.com> References: <20200729033424.2629-1-justin.he@arm.com> Message-ID-Hash: 7RP4CSUI4DOCLVXRJ7SS3YX6AR55NS3Q X-Message-ID-Hash: 7RP4CSUI4DOCLVXRJ7SS3YX6AR55NS3Q X-MailFrom: justin.he@arm.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Catalin Marinas , Will Deacon , Greg Kroah-Hartman , "Rafael J. Wysocki" , Andrew Morton , Steve Capper , Mark Rutland , Anshuman Khandual , Hsin-Yi Wang , Jason Gunthorpe , Dave Hansen , Kees Cook , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-mm@kvack.org, Pankaj Gupta , Kaly Xin , Jia He X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit The helper is to find the lowest iomem resource that covers part of [@start..@end] It is useful when relaxing the alignment check for dax pmem kmem. Signed-off-by: Jia He --- include/linux/ioport.h | 3 +++ kernel/resource.c | 3 ++- 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/ioport.h b/include/linux/ioport.h index 6c2b06fe8beb..203fd16c9f45 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -247,6 +247,9 @@ extern struct resource * __request_region(struct resource *, extern void __release_region(struct resource *, resource_size_t, resource_size_t); +extern int find_next_iomem_res(resource_size_t start, resource_size_t end, + unsigned long flags, unsigned long desc, + bool first_lvl, struct resource *res); #ifdef CONFIG_MEMORY_HOTREMOVE extern int release_mem_region_adjustable(struct resource *, resource_size_t, resource_size_t); diff --git a/kernel/resource.c b/kernel/resource.c index 841737bbda9e..57e6a6802a3d 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -338,7 +338,7 @@ EXPORT_SYMBOL(release_resource); * @first_lvl: walk only the first level children, if set * @res: return ptr, if resource found */ -static int find_next_iomem_res(resource_size_t start, resource_size_t end, +int find_next_iomem_res(resource_size_t start, resource_size_t end, unsigned long flags, unsigned long desc, bool first_lvl, struct resource *res) { @@ -391,6 +391,7 @@ static int find_next_iomem_res(resource_size_t start, resource_size_t end, read_unlock(&resource_lock); return p ? 0 : -ENODEV; } +EXPORT_SYMBOL(find_next_iomem_res); static int __walk_iomem_res_desc(resource_size_t start, resource_size_t end, unsigned long flags, unsigned long desc, -- 2.17.1 _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org