From patchwork Sun Aug 18 09:05:54 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11099463 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 A7E7513A0 for ; Sun, 18 Aug 2019 09:10:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 930FA285D5 for ; Sun, 18 Aug 2019 09:10:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 847D828879; Sun, 18 Aug 2019 09:10:29 +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=-2.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 21EFA285D5 for ; Sun, 18 Aug 2019 09:10:29 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id B960F20260CC7; Sun, 18 Aug 2019 02:12:04 -0700 (PDT) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: None (no SPF record) identity=mailfrom; client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=batv+0e271e77d026f8461fef+5838+infradead.org+hch@bombadil.srs.infradead.org; receiver=linux-nvdimm@lists.01.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (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 3DF3B2021EBCB for ; Sun, 18 Aug 2019 02:12:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=MphDKR16rmuINKbbfuGgsPxlH9912jWufK/S5NE9ukw=; b=nRfc65NdyjJ1PhbhTIl5UZYUBS bKySSGUBNKUyeCZ+kSieoTIMoHgmtFzIivwwhRbjS7AEvuqOvqYeARuAJkQfaq0tgNXjf9cMFkhvU hiVaW5xM2yUQ5g1uNDc5nxwBXbZ42jm0wRBJMHZ18GfbV9WP+TbOkL51BFswG9d4+YIEq63b+zjLr WRyhNPgFSD3K9Nq32PfU1ETICEsWZ9soG7OXenoXTo7RPH1hKIXsvDoeg8zFSQCwlpw2vWKJEraCS k2vYnnKsSk4wrCBBsJctRW2SHUJt8Q2R++jZ1agOOFAIdJMSc/I+IITn90/cEsLvudxE0EgtQaGEn FQkpDrZw==; Received: from 213-225-6-198.nat.highway.a1.net ([213.225.6.198] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hzHCg-0007Yk-L8; Sun, 18 Aug 2019 09:10:23 +0000 From: Christoph Hellwig To: Dan Williams , Jason Gunthorpe Subject: [PATCH 1/4] resource: add a not device managed request_free_mem_region variant Date: Sun, 18 Aug 2019 11:05:54 +0200 Message-Id: <20190818090557.17853-2-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190818090557.17853-1-hch@lst.de> References: <20190818090557.17853-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html 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: linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, Bharata B Rao , linux-mm@kvack.org, Andrew Morton Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP Factor out the guts of devm_request_free_mem_region so that we can implement both a device managed and a manually release version as tiny wrappers around it. Signed-off-by: Christoph Hellwig Reviewed-by: Ira Weiny Reviewed-by: Dan Williams --- include/linux/ioport.h | 2 ++ kernel/resource.c | 45 +++++++++++++++++++++++++++++------------- 2 files changed, 33 insertions(+), 14 deletions(-) diff --git a/include/linux/ioport.h b/include/linux/ioport.h index 5b6a7121c9f0..7bddddfc76d6 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -297,6 +297,8 @@ static inline bool resource_overlaps(struct resource *r1, struct resource *r2) struct resource *devm_request_free_mem_region(struct device *dev, struct resource *base, unsigned long size); +struct resource *request_free_mem_region(struct resource *base, + unsigned long size, const char *name); #endif /* __ASSEMBLY__ */ #endif /* _LINUX_IOPORT_H */ diff --git a/kernel/resource.c b/kernel/resource.c index 7ea4306503c5..74877e9d90ca 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -1644,19 +1644,8 @@ void resource_list_free(struct list_head *head) EXPORT_SYMBOL(resource_list_free); #ifdef CONFIG_DEVICE_PRIVATE -/** - * devm_request_free_mem_region - find free region for device private memory - * - * @dev: device struct to bind the resource to - * @size: size in bytes of the device memory to add - * @base: resource tree to look in - * - * This function tries to find an empty range of physical address big enough to - * contain the new resource, so that it can later be hotplugged as ZONE_DEVICE - * memory, which in turn allocates struct pages. - */ -struct resource *devm_request_free_mem_region(struct device *dev, - struct resource *base, unsigned long size) +static struct resource *__request_free_mem_region(struct device *dev, + struct resource *base, unsigned long size, const char *name) { resource_size_t end, addr; struct resource *res; @@ -1670,7 +1659,10 @@ struct resource *devm_request_free_mem_region(struct device *dev, REGION_DISJOINT) continue; - res = devm_request_mem_region(dev, addr, size, dev_name(dev)); + if (dev) + res = devm_request_mem_region(dev, addr, size, name); + else + res = request_mem_region(addr, size, name); if (!res) return ERR_PTR(-ENOMEM); res->desc = IORES_DESC_DEVICE_PRIVATE_MEMORY; @@ -1679,7 +1671,32 @@ struct resource *devm_request_free_mem_region(struct device *dev, return ERR_PTR(-ERANGE); } + +/** + * devm_request_free_mem_region - find free region for device private memory + * + * @dev: device struct to bind the resource to + * @size: size in bytes of the device memory to add + * @base: resource tree to look in + * + * This function tries to find an empty range of physical address big enough to + * contain the new resource, so that it can later be hotplugged as ZONE_DEVICE + * memory, which in turn allocates struct pages. + */ +struct resource *devm_request_free_mem_region(struct device *dev, + struct resource *base, unsigned long size) +{ + return __request_free_mem_region(dev, base, size, dev_name(dev)); +} EXPORT_SYMBOL_GPL(devm_request_free_mem_region); + +struct resource *request_free_mem_region(struct resource *base, + unsigned long size, const char *name) +{ + return __request_free_mem_region(NULL, base, size, name); +} +EXPORT_SYMBOL_GPL(request_free_mem_region); + #endif /* CONFIG_DEVICE_PRIVATE */ static int __init strict_iomem(char *str)