From patchwork Thu Oct 21 12:44:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12574935 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C6502C433EF for ; Thu, 21 Oct 2021 12:45:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8F9B660F02 for ; Thu, 21 Oct 2021 12:45:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230407AbhJUMrR (ORCPT ); Thu, 21 Oct 2021 08:47:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230379AbhJUMrQ (ORCPT ); Thu, 21 Oct 2021 08:47:16 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68FA3C06161C for ; Thu, 21 Oct 2021 05:45:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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; bh=acZg4wkuvbE9IZmYXfy6RNvUK0RdFUpI4ihnDw7DO/4=; b=23/nBcxqvr25HYTCsBEfXIijFk ELgOpFDemlWuE6yzeZPeI0cnUS3BlCWJ7gtrwjSBYNFmYaGpGrFHVfx8FMCx4FPSQIToNuyvdbWed o9ZDZhZeIIC6vkJqkQbYK55S5jFnixaZIV4qWd/2YKxKWiXtxH3agwhjPr0ksDmwd7RslsfNgE1sr KCBIsRHSv7ZyUmupZ1WGDM8aw1gn7tVAwaq6rPCOADkcaBVK40wCuRKELz+/Up/SRLMIRPoDAffjc /L+pCNsJ2JohFC1GSFMiQJhGDeTJw5Zjml93VDjKBFmW6BWCnDSUb6KmRWaUvzn6PzXolaDiYR/9d 9wHc6NvA==; Received: from [2001:4bb8:180:8777:dd70:8011:36d9:4c23] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mdXRI-007X0C-RZ; Thu, 21 Oct 2021 12:44:57 +0000 From: Christoph Hellwig To: Andrew Morton Cc: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Jan Kara , linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 4/5] mm: don't automatically unregister bdis Date: Thu, 21 Oct 2021 14:44:40 +0200 Message-Id: <20211021124441.668816-5-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211021124441.668816-1-hch@lst.de> References: <20211021124441.668816-1-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 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org All BDI users now unregister explicitly. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara --- mm/backing-dev.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 8a46a0a4b72fa..768e9ae489f66 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -965,8 +965,7 @@ static void release_bdi(struct kref *ref) struct backing_dev_info *bdi = container_of(ref, struct backing_dev_info, refcnt); - if (test_bit(WB_registered, &bdi->wb.state)) - bdi_unregister(bdi); + WARN_ON_ONCE(test_bit(WB_registered, &bdi->wb.state)); WARN_ON_ONCE(bdi->dev); wb_exit(&bdi->wb); kfree(bdi);