From patchwork Fri Dec 15 22:04:38 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 10116181 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9E3056019C for ; Fri, 15 Dec 2017 22:11:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9211E29D7C for ; Fri, 15 Dec 2017 22:11:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 86DCD2A1B7; Fri, 15 Dec 2017 22:11:44 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID 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 3B3A029D7C for ; Fri, 15 Dec 2017 22:11:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932429AbdLOWI5 (ORCPT ); Fri, 15 Dec 2017 17:08:57 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:45981 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756412AbdLOWFd (ORCPT ); Fri, 15 Dec 2017 17:05:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=nDYcSE+NuhzGHfCkLxk41aV9zRFTyfrNndBRcB+78Yc=; b=a08n2/dnm13ShJINcOFu/ODoU qKKX3qPYAo3JqUKd0ZxJb9nZ+55Wom7tepit4Ox+tQTBUajgsg30oAy/sgpri2S+0b0JCv+fPhaIP LEdF0BPtUQvq46OV4D7vzDO361/e7ozRPkyKIGNgpby5QdYDfDNk/7/RhAd5YmbfuJpqKAk0MPt7n qC8fSLnDZqfcEZlr/nKELeMwMTcEW2VBKGre1fEtqKyjrdhaiOawspyNIf/0f7PmBpuaPBd5qu8K4 0nz68lYwqfY61yIX5ytZg6WIrI+LTiVEgNR80WdzEqt7a1g1K0uhSe2gXDSEpmfUV+fJMLBvL0HW2 /bWgbhH1w==; Received: from willy by bombadil.infradead.org with local (Exim 4.87 #1 (Red Hat Linux)) id 1ePy6J-0002Ii-8R; Fri, 15 Dec 2017 22:05:03 +0000 From: Matthew Wilcox To: linux-kernel@vger.kernel.org Cc: Matthew Wilcox , Ross Zwisler , David Howells , Shaohua Li , Jens Axboe , Rehas Sachdeva , Marc Zyngier , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-usb@vger.kernel.org, linux-raid@vger.kernel.org Subject: [PATCH v5 66/78] dax: Fix sparse warning Date: Fri, 15 Dec 2017 14:04:38 -0800 Message-Id: <20171215220450.7899-67-willy@infradead.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20171215220450.7899-1-willy@infradead.org> References: <20171215220450.7899-1-willy@infradead.org> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Matthew Wilcox sparse doesn't know that follow_pte_pmd conditionally acquires the ptl, so add an annotation to let it know what's going on. Signed-off-by: Matthew Wilcox --- fs/dax.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/dax.c b/fs/dax.c index f591ab5be590..6ef727af30f0 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -531,6 +531,7 @@ static void dax_mapping_entry_mkclean(struct address_space *mapping, */ if (follow_pte_pmd(vma->vm_mm, address, &start, &end, &ptep, &pmdp, &ptl)) continue; + __acquire(ptl); /* Conditionally acquired above */ /* * No need to call mmu_notifier_invalidate_range() as we are