From patchwork Thu Jun 13 09:43:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10992509 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 7412513AD for ; Thu, 13 Jun 2019 15:44:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 64DD526223 for ; Thu, 13 Jun 2019 15:44:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5878820499; Thu, 13 Jun 2019 15:44:57 +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=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 04231204BE for ; Thu, 13 Jun 2019 15:44:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731887AbfFMPor (ORCPT ); Thu, 13 Jun 2019 11:44:47 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:33488 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731816AbfFMJoK (ORCPT ); Thu, 13 Jun 2019 05:44:10 -0400 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=wPaWdCIL9H03r8HySQVqow//0jNnHtt/N2MgQJISZ8s=; b=avKv6xwbjUwP5JnIfmut07FD4E gJPJZ8ZQmWlKJYjAzKHwT0cqU9A36XKIAMssk8gQpq3IhjxldclzNcvSF1zNcI9FEe5J4DrlwynxU BOkf4ZqVPr5yBB+WsSzI5BaGpY9hBxi7Qh2og5bCGOdVDDRSHg1MVKNLMpKkG5YCrQBvTdqcEqdjK BIBwnNK0AKvH4MNtye6T+KQS+ymNK5QfOcLa6VAmU5b2i3i5m5oX14CGYl5bXnH+Ld0nP0t5HEDau tkrt/zZv4j5UrYFMV46EwV5BMV6zPYhoYxnhEc4quUvclTo0SfZwBQ7d4I6wYboawBdk9qACJlW6E gRpSlcmw==; Received: from mpp-cp1-natpool-1-198.ethz.ch ([82.130.71.198] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hbMH8-0001rw-At; Thu, 13 Jun 2019 09:44:06 +0000 From: Christoph Hellwig To: Dan Williams , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Jason Gunthorpe , Ben Skeggs Cc: linux-mm@kvack.org, nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-nvdimm@lists.01.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 13/22] device-dax: use the dev_pagemap internal refcount Date: Thu, 13 Jun 2019 11:43:16 +0200 Message-Id: <20190613094326.24093-14-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190613094326.24093-1-hch@lst.de> References: <20190613094326.24093-1-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 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The functionality is identical to the one currently open coded in device-dax. Signed-off-by: Christoph Hellwig --- drivers/dax/dax-private.h | 4 --- drivers/dax/device.c | 52 +-------------------------------------- 2 files changed, 1 insertion(+), 55 deletions(-) diff --git a/drivers/dax/dax-private.h b/drivers/dax/dax-private.h index a45612148ca0..ed04a18a35be 100644 --- a/drivers/dax/dax-private.h +++ b/drivers/dax/dax-private.h @@ -51,8 +51,6 @@ struct dax_region { * @target_node: effective numa node if dev_dax memory range is onlined * @dev - device core * @pgmap - pgmap for memmap setup / lifetime (driver owned) - * @ref: pgmap reference count (driver owned) - * @cmp: @ref final put completion (driver owned) */ struct dev_dax { struct dax_region *region; @@ -60,8 +58,6 @@ struct dev_dax { int target_node; struct device dev; struct dev_pagemap pgmap; - struct percpu_ref ref; - struct completion cmp; }; static inline struct dev_dax *to_dev_dax(struct device *dev) diff --git a/drivers/dax/device.c b/drivers/dax/device.c index e23fa1bd8c97..a9d7c90ecf1e 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -14,37 +14,6 @@ #include "dax-private.h" #include "bus.h" -static struct dev_dax *ref_to_dev_dax(struct percpu_ref *ref) -{ - return container_of(ref, struct dev_dax, ref); -} - -static void dev_dax_percpu_release(struct percpu_ref *ref) -{ - struct dev_dax *dev_dax = ref_to_dev_dax(ref); - - dev_dbg(&dev_dax->dev, "%s\n", __func__); - complete(&dev_dax->cmp); -} - -static void dev_dax_percpu_exit(void *data) -{ - struct percpu_ref *ref = data; - struct dev_dax *dev_dax = ref_to_dev_dax(ref); - - dev_dbg(&dev_dax->dev, "%s\n", __func__); - wait_for_completion(&dev_dax->cmp); - percpu_ref_exit(ref); -} - -static void dev_dax_percpu_kill(struct dev_pagemap *pgmap) -{ - struct dev_dax *dev_dax = container_of(pgmap, struct dev_dax, pgmap); - - dev_dbg(&dev_dax->dev, "%s\n", __func__); - percpu_ref_kill(pgmap->ref); -} - static int check_vma(struct dev_dax *dev_dax, struct vm_area_struct *vma, const char *func) { @@ -442,10 +411,6 @@ static void dev_dax_kill(void *dev_dax) kill_dev_dax(dev_dax); } -static const struct dev_pagemap_ops dev_dax_pagemap_ops = { - .kill = dev_dax_percpu_kill, -}; - int dev_dax_probe(struct device *dev) { struct dev_dax *dev_dax = to_dev_dax(dev); @@ -463,24 +428,9 @@ int dev_dax_probe(struct device *dev) return -EBUSY; } - init_completion(&dev_dax->cmp); - rc = percpu_ref_init(&dev_dax->ref, dev_dax_percpu_release, 0, - GFP_KERNEL); - if (rc) - return rc; - - rc = devm_add_action_or_reset(dev, dev_dax_percpu_exit, &dev_dax->ref); - if (rc) - return rc; - - dev_dax->pgmap.ref = &dev_dax->ref; - dev_dax->pgmap.ops = &dev_dax_pagemap_ops; addr = devm_memremap_pages(dev, &dev_dax->pgmap); - if (IS_ERR(addr)) { - devm_remove_action(dev, dev_dax_percpu_exit, &dev_dax->ref); - percpu_ref_exit(&dev_dax->ref); + if (IS_ERR(addr)) return PTR_ERR(addr); - } inode = dax_inode(dax_dev); cdev = inode->i_cdev;