From patchwork Wed Dec 6 00:41:51 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 10094357 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 2C7A560329 for ; Wed, 6 Dec 2017 00:48:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1E1D42989A for ; Wed, 6 Dec 2017 00:48:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 12E2129915; Wed, 6 Dec 2017 00:48:38 +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=ham 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 C6D592989A for ; Wed, 6 Dec 2017 00:48:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753401AbdLFAqY (ORCPT ); Tue, 5 Dec 2017 19:46:24 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:55677 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753400AbdLFAmS (ORCPT ); Tue, 5 Dec 2017 19:42:18 -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=jxcHLOxiA4QqUpiowHNo7PL7PKPF7K7FHtc1VFFYRM0=; b=pRTYGJi5uTMca0Pl4jeNSxxkz HIWbmybn/nqVPNOtuFft5nkfsDdUuZ+H3DdEjja8L4Fc5o12XfjP7mGbsNwc5L7rWYublJyWOaII3 Sm8Nf2MMOPGUrcuJZXjOzGfNuNdVNPsXccRlbJ7SgnMI6PVjq8OBSxBPf3sM/fLXxfepOznahiwou dv6cnYY2UCAn3YDW5zrIaTkVrqMRTGQXK/lICN6h/2vYWv9li9OYoly0/VEFsGHAMvp29nHr7cTqs Cx5Pgc3ZZ0PnVSZ7J/5VwVTlV0zWV6Zgj4s2x8jItsa6cmGaLt0HBEb23yMXd/lln/tOu5y1g/eHK NI20rOjvQ==; Received: from willy by bombadil.infradead.org with local (Exim 4.87 #1 (Red Hat Linux)) id 1eMNmv-0001Bw-VO; Wed, 06 Dec 2017 00:42:13 +0000 From: Matthew Wilcox Cc: Matthew Wilcox , Ross Zwisler , Jens Axboe , Rehas Sachdeva , 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-kernel@vger.kernel.org Subject: [PATCH v4 65/73] dax: Fix sparse warning Date: Tue, 5 Dec 2017 16:41:51 -0800 Message-Id: <20171206004159.3755-66-willy@infradead.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20171206004159.3755-1-willy@infradead.org> References: <20171206004159.3755-1-willy@infradead.org> To: unlisted-recipients:; (no To-header on input) Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@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 c663d82e8ba3..7a86ff1153dd 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