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=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, 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 6F61AC3A59C for ; Fri, 16 Aug 2019 06:54:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 436C621655 for ; Fri, 16 Aug 2019 06:54:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="I3T8QraO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727039AbfHPGyz (ORCPT ); Fri, 16 Aug 2019 02:54:55 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:60706 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725945AbfHPGyv (ORCPT ); Fri, 16 Aug 2019 02:54:51 -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=tXcE1XGfAjBldp4qZPqG6onLgHm1jEyfgSiznWOouFY=; b=I3T8QraOQoXLX7b/3Lnh/DGNnY 0Lo8ks5Flw6fLn8VtJSnb6371a63J3dg/ngEtGCdAP3hO3S2xSjjMgjCApwx5dU0AoitlgMZ8BcN1 TNz8sL2XwZ7ZWL6X86A2rGJbcWyOx3OfM5lu4tXtuYa/jgA+rAJcM1oSD2Fpv7cksDCgUJC/fn9Kq nTAiST3Dnx0BeidJNl39SLSRug9Wcm6I4KcVLRaKNMWlFNVLoynlTpYBVLH114vG62z0+eRGKTfvN biBEvbSMgMzXSstGo8fHxOrdnwa/1RwqGz+5oEpCIvgTw0FvnwHhrfWzzmrI3E17qFXjN1l8el6bE tD/zuFow==; Received: from [2001:4bb8:18c:28b5:44f9:d544:957f:32cb] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hyW8O-0008Hc-Qe; Fri, 16 Aug 2019 06:54:49 +0000 From: Christoph Hellwig To: Dan Williams , Jason Gunthorpe Cc: Bharata B Rao , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org Subject: [PATCH 3/4] memremap: don't use a separate devm action for devmap_managed_enable_get Date: Fri, 16 Aug 2019 08:54:33 +0200 Message-Id: <20190816065434.2129-4-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190816065434.2129-1-hch@lst.de> References: <20190816065434.2129-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Just clean up for early failures and then piggy back on devm_memremap_pages_release. This helps with a pending not device managed version of devm_memremap_pages. Signed-off-by: Christoph Hellwig --- mm/memremap.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/mm/memremap.c b/mm/memremap.c index 416b4129acbb..4e11da4ecab9 100644 --- a/mm/memremap.c +++ b/mm/memremap.c @@ -21,13 +21,13 @@ DEFINE_STATIC_KEY_FALSE(devmap_managed_key); EXPORT_SYMBOL(devmap_managed_key); static atomic_t devmap_managed_enable; -static void devmap_managed_enable_put(void *data) +static void devmap_managed_enable_put(void) { if (atomic_dec_and_test(&devmap_managed_enable)) static_branch_disable(&devmap_managed_key); } -static int devmap_managed_enable_get(struct device *dev, struct dev_pagemap *pgmap) +static int devmap_managed_enable_get(struct dev_pagemap *pgmap) { if (!pgmap->ops || !pgmap->ops->page_free) { WARN(1, "Missing page_free method\n"); @@ -36,13 +36,16 @@ static int devmap_managed_enable_get(struct device *dev, struct dev_pagemap *pgm if (atomic_inc_return(&devmap_managed_enable) == 1) static_branch_enable(&devmap_managed_key); - return devm_add_action_or_reset(dev, devmap_managed_enable_put, NULL); + return 0; } #else -static int devmap_managed_enable_get(struct device *dev, struct dev_pagemap *pgmap) +static int devmap_managed_enable_get(struct dev_pagemap *pgmap) { return -EINVAL; } +static void devmap_managed_enable_put(void) +{ +} #endif /* CONFIG_DEV_PAGEMAP_OPS */ static void pgmap_array_delete(struct resource *res) @@ -129,6 +132,7 @@ static void devm_memremap_pages_release(void *data) untrack_pfn(NULL, PHYS_PFN(res->start), resource_size(res)); pgmap_array_delete(res); WARN_ONCE(pgmap->altmap.alloc, "failed to free all reserved pages\n"); + devmap_managed_enable_put(); } static void dev_pagemap_percpu_release(struct percpu_ref *ref) @@ -218,7 +222,7 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap) } if (need_devmap_managed) { - error = devmap_managed_enable_get(dev, pgmap); + error = devmap_managed_enable_get(pgmap); if (error) return ERR_PTR(error); } @@ -327,6 +331,7 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap) err_array: dev_pagemap_kill(pgmap); dev_pagemap_cleanup(pgmap); + devmap_managed_enable_put(); return ERR_PTR(error); } EXPORT_SYMBOL_GPL(devm_memremap_pages); -- 2.20.1