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=-9.6 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,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 E5FCEC3A59E for ; Sun, 18 Aug 2019 09:12:42 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A56C62173B for ; Sun, 18 Aug 2019 09:12:42 +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="eHfAZrzi" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A56C62173B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 59B946B000A; Sun, 18 Aug 2019 05:12:42 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 57A546B000C; Sun, 18 Aug 2019 05:12:42 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3F1036B000D; Sun, 18 Aug 2019 05:12:42 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0053.hostedemail.com [216.40.44.53]) by kanga.kvack.org (Postfix) with ESMTP id 1545F6B000A for ; Sun, 18 Aug 2019 05:12:42 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id BFA6E181AC9B4 for ; Sun, 18 Aug 2019 09:12:41 +0000 (UTC) X-FDA: 75834983322.08.hat44_51b2ed99bdf4d X-HE-Tag: hat44_51b2ed99bdf4d X-Filterd-Recvd-Size: 4722 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf42.hostedemail.com (Postfix) with ESMTP for ; Sun, 18 Aug 2019 09:12:41 +0000 (UTC) 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=b+vo0s9N2g9CNDtpIzFfCAQBglRNbGiW9Jp0nnEhxQw=; b=eHfAZrzirDylAXJSWjBhAngNkE 0uPVa8U33BCbFJ5FuyG66U51Aakum7WMSPsQu8Wfy8FtWF0TV0X2I+h7bYAkYMrSdQNkJH1DPcLd1 AUCrVZm7GvKtgCb6HufFhjCISPef39xil1rvUuCQ6U6Q/zz/xfKWaFnmo2U8sUOeT+pBLGI0EaZUq gosjp3NIcr7CS2y1Mx66SSW6KIzhQ+NhaB7/eo6LUE7NN3ZqnX48OCKLEUPaX23oGp9rGCBnrCRb0 cK3fX75riiMU04WEm7SFtiqxtrHul9yOL+OY4TNGn//RmdGLVcwjZBNPp8RSgEpcmoW4JQ61lYXJ+ cvHghz9w==; Received: from [2001:4bb8:188:24ee:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hzHEs-00018e-7E; Sun, 18 Aug 2019 09:12:38 +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, Ira Weiny Subject: [PATCH 3/4] memremap: don't use a separate devm action for devmap_managed_enable_get Date: Sun, 18 Aug 2019 11:05:56 +0200 Message-Id: <20190818090557.17853-4-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 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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 Reviewed-by: Ira Weiny --- kernel/memremap.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index 600a14cbe663..09a087ca30ff 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -21,13 +21,13 @@ DEFINE_STATIC_KEY_FALSE(devmap_managed_key); EXPORT_SYMBOL(devmap_managed_key); static atomic_t devmap_managed_enable; =20 -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); } =20 -static int devmap_managed_enable_get(struct device *dev, struct dev_page= map *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 *d= ev, struct dev_pagemap *pgm =20 if (atomic_inc_return(&devmap_managed_enable) =3D=3D 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_page= map *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 */ =20 static void pgmap_array_delete(struct resource *res) @@ -123,6 +126,7 @@ 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(); } =20 static void dev_pagemap_percpu_release(struct percpu_ref *ref) @@ -212,7 +216,7 @@ void *devm_memremap_pages(struct device *dev, struct = dev_pagemap *pgmap) } =20 if (need_devmap_managed) { - error =3D devmap_managed_enable_get(dev, pgmap); + error =3D devmap_managed_enable_get(pgmap); if (error) return ERR_PTR(error); } @@ -321,6 +325,7 @@ 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); --=20 2.20.1